Search results “Time stamping protocol in cryptography definition”
Timestamp Ordering Protocol in Hindi and English with all Rules
Timestamp Ordering Protocol in Hindi and English with all Rules For Students of B.Tech, B.E, MCA, BCA, B.Sc., M.Sc., Courses - As Per IP University Syllabus and Other Engineering Courses
Blockchain 101 Ep 47 - What is a Timestamp?
Timestamps show that the blocks are connected in a chronological order. It marks the time for each transaction on the blockchain. Simply put, the timestamp proves when and what has happened on the blockchain, and it’s tamper-proof. Timestamp plays to role of a notary, and it’s more credible than a traditional one. Because nobody can alter the information on the blockchain. Given the timestamp feature, blockchain technology is suitable for areas such as intellectual property protection. For instance, when you have written a thesis, You want to consult an industry expert before publishing, but you are afraid the expert might steal your work. Under such a scenario, you only need to save it on the blockchain to easily prove your ownership over the article. Huobi Global Exchange: https://www.huobi.com Follow us on: Blog: https://blog.huobi.com/ Facebook: https://www.facebook.com/huobiglobalofficial Instagram: https://www.instagram.com/huobiglobalofficial Medium: https://medium.com/@huobiglobal Telegram: https://t.me/huobiglobalofficial Twitter: https://twitter.com/HuobiGlobal Youtube: https://www.youtube.com/HuobiGlobal
Views: 967 Huobi Global
Module 7: Replay Attack
A replay attack occurs when an unauthorized user captures network traffic and then sends the communication to its original destination, acting as the original sender. To prevent replay attacks you can implement timestamps and sequence numbers. References: Dunkerley, D., & Samuelle, T. (2014). Secure Network Administration. In Mike Meyers' CompTIA Security Certification passport, fourth edition (exam SY0-401) (4th ed., p. 300). New York: McGraw-Hill Education.
Views: 20192 Simple Security
Chapter 10, part 1, Information Security: Principles and Practice
Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 10: Real-World Security Protocols Sections 10.1-10.2 intro, SSH Class Lecture, 2011
Views: 6615 Mark Stamp
What is CRYPTOGRAPHIC MESSAGE SYNTAX? What does CRYPTOGRAPHIC MESSAGE SYNTAX mean? CRYPTOGRAPHIC MESSAGE SYNTAX meaning - CRYPTOGRAPHIC MESSAGE SYNTAX definition - CRYPTOGRAPHIC MESSAGE SYNTAX explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ The Cryptographic Message Syntax (CMS) is the IETF's standard for cryptographically protected messages. It can be used to digitally sign, digest, authenticate or encrypt any form of digital data. CMS is based on the syntax of PKCS#7, which in turn is based on the Privacy-Enhanced Mail standard. The newest version of CMS (as of 2009) is specified in RFC 5652 (but see also RFC 5911 for updated ASN.1 modules conforming to ASN.1 2002). The architecture of CMS is built around certificate-based key management, such as the profile defined by the PKIX working group. CMS is used as the key cryptographic component of many other cryptographic standards, such as S/MIME, PKCS #12 and the RFC 3161 Digital timestamping protocol. OpenSSL is open source software that can encrypt, decrypt, sign and verify, compress and uncompress CMS documents.
Views: 596 The Audiopedia
What is CRYPTO PHONE? What does CRYPTO PHONE mean? CRYPTO PHONE meaning & explanation
What is CRYPTO PHONE? What does CRYPTO PHONE mean? CRYPTO PHONE meaning - CRYPTO PHONE definition - CRYPTO PHONE explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Crypto phones are mobile telephones that provide security against eavesdropping and electronic surveillance. The interception of telecommunications has become a major industry. Most of the world's intelligence agencies and many private organisations intercept telephone communications to obtain military, economic and political information. The price of simple mobile phone surveillance devices has become so low that many individuals can afford to use them. Advances in technology have made it difficult to determine who is intercepting and recording private communications. Crypto phones can protect calls from interception by using algorithms to encrypt the signals. The phones have a cryptographic chip that handles encryption and decryption. Two algorithms are programmed into the chip: A key-exchange algorithm for the key agreement protocol and a symmetric-key algorithm for voice encryption. For the system to work, both users must have crypto phones logged into crypto mode. As with other phones, the signal is encrypted by GSM but it is also encrypted by the cryptographic chip. When the IMSI-catcher performs a man-in-the-middle attack and disables the GSM encryption, the crypto phone encryption remains intact. Therefore, while the signal is still being intercepted, it can no longer be decoded and fake SMS messages can't be sent as the IMSI-catcher does not have the correct code. At the beginning of the call, both users get the same session key by using the hash function. Then the session key becomes a confirm code. The confirm code could be 3 letters or 4 numbers, depending on the phone's manufacturer. In the crypto mode, the user reads the confirm code over the encrypted line to his communication partner and verifies the confirm code his partner reads back. If there is a discrepancy in the confirm code, a man-in-the-middle attack has been detected. The "session code" that has been established is used only for that specific call. At termination, all the parameters are wiped from memory, and there is no way to reconstruct the code. Intercepted and stored encrypted material can be kept for later analysis, but there is no way to break the code except, possibly, by the time consuming trial-and-error method.
Views: 708 The Audiopedia
What is CRYPTOGRAPHIC NONCE? What does CRYPTOGRAPHIC NONCE mean? CRYPTOGRAPHIC NONCE meaning - CRYPTOGRAPHIC NONCE definition - CRYPTOGRAPHIC NONCE explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, a nonce is an arbitrary number that may only be used once. It is similar in spirit to a nonce word, hence the name. It is often a random or pseudo-random number issued in an authentication protocol to ensure that old communications cannot be reused in replay attacks. They can also be useful as initialization vectors and in cryptographic hash function. A nonce is an arbitrary number used only once in a cryptographic communication, in the spirit of a nonce word. They are often random or pseudo-random numbers. Many nonces also include a timestamp to ensure exact timeliness, though this requires clock synchronization between organizations. The addition of a client nonce ("cnonce") helps to improve the security in some ways as implemented in digest access authentication. To ensure that a nonce is used only once, it should be time-variant (including a suitably fine-grained timestamp in its value), or generated with enough random bits to ensure a probabilistically insignificant chance of repeating a previously generated value. Some authors define pseudo-randomness (or unpredictability) as a requirement for a nonce. Authentication protocols may use nonces to ensure that old communications cannot be reused in replay attacks. For instance, nonces are used in HTTP digest access authentication to calculate an MD5 digest of the password. The nonces are different each time the 401 authentication challenge response code is presented, thus making replay attacks virtually impossible. The scenario of ordering products over the Internet can provide an example of the usefulness of nonces in replay attacks. An attacker could take the encrypted information and—without needing to decrypt—could continue to send a particular order to the supplier, thereby ordering products over and over again under the same name and purchase information. The nonce is used to give 'originality' to a given message so that if the company receives any other orders from the same person with the same nonce, it will discard those as invalid orders. A nonce may be used to ensure security for a stream cipher. Where the same key is used for more than one message and then a different nonce is used to ensure that the keystream is different for different messages encrypted with that key; often the message number is used. Secret nonce values are used by the Lamport signature scheme as a signer-side secret which can be selectively revealed for comparison to public hashes for signature creation and verification. Initialization vectors may be referred to as nonces, as they are typically random or pseudo-random. Nonces are used in proof-of-work systems to vary the input to a cryptographic hash function so as to obtain a hash for a certain input that fulfills certain arbitrary conditions. In doing so, it becomes far more difficult to create a "desirable" hash than to verify it, shifting the burden of work onto one side of a transaction or system. For example, proof of work, using hash functions, was considered as a means to combat email spam by forcing email senders to find a hash value for the email (which included a timestamp to prevent pre-computation of useful hashes for later use) that had an arbitrary number of leading zeroes, by hashing the same input with a large number of nonce values until a "desirable" hash was obtained. Similarly, the bitcoin block-chain hashing algorithm can be tuned to an arbitrary difficulty by changing the required minimum/maximum value of the hash so that the number of bitcoins awarded for new blocks does not increase linearly with increased network computation power as new users join. This is likewise achieved by forcing bitcoin miners to add nonce values to the value being hashed to change the hash algorithm output. Because cryptographic hash algorithms cannot easily be predicted based on their inputs, this makes the act of blockchain hashing and the possibility of being awarded bitcoins something of a lottery, where the first "miner" to find a nonce that delivers a desirable hash is awarded valuable bitcoins.
Views: 6287 The Audiopedia
Role-Based and Mandatory Access Control (ITS335, L11, Y14)
Compare Discretionary, Role-based and Mandatory Access Control. Course material via: http://sandilands.info/sgordon/teaching
Views: 10168 Steven Gordon
How does a blockchain work - Simply Explained
What is a blockchain and how do they work? I'll explain why blockchains are so special in simple and plain English! 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 📚 Sources can be found on my website: https://www.savjee.be/videos/simply-explained/how-does-a-blockchain-work/ 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 2747548 Simply Explained - Savjee
Internet Security Protocols Specification and Modeling
Internet Security Protocols Specification and Modeling
Views: 82 TechnologyFirst
Mod-09 Lec-35 Message Ordering
Storage Systems by Dr. K. Gopinath,Department of Computer Science and Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 3057 nptelhrd
Inside Zuckerberg's plan to dominate the world | Facebook, Instagram, WhatsApp integration
Mark Zuckerberg announced a plan to integrate messaging platforms of WhatsApp, Instagram, and Facebook Messenger. Behind promises of more convenience and growth is a plan to dominate the world of data and social media. If you like to protect yourself on the web and want to support my channel, sign up for NordVPN at https://nordvpn.org/thehatedone or use my coupon code 'thehatedone' at the checkout to save 75% on the 3-year plan! Bitcoin: 1C7UkndgpQqjTrUkk8pY1rRpmddwHaEEuf Dash Xm4Mc5gXhcpWXKN84c7YRD4GSb1fpKFmrc Litecoin LMhiVJdFhYPejMPJE7r9ooP3nm3DrX4eBT Ethereum 0x6F8bb890E122B9914989D861444Fa492B8520575 All of Facebook’s IT department, thousands of developers, are going to devote the next year or so to merge the backbone of the three platforms into one, so that their users can seamlessly send messages to each other across all three apps. The job won’t be done until it’s possible for WhatsApp users to send messages to Instagram users even if they don’t have Instagram accounts at all. Facebook has a long track record of violating and invading users privacy. From opening up access to their data to third party developers and advertisers, through sharing user data without their explicit consent, to tracking non-Facebook users and targeting them with ads. The move to integrate all three platforms into one seems that much more bizarre, as the integration could open up the ecosystem to even more security vulnerabilities and information manipulation. Sources The Facebook, Instagram, WhatsApp integration https://www.nytimes.com/2019/01/25/technology/facebook-instagram-whatsapp-messenger.html The New York Times coverage of Facebook's privacy cases https://www.nytimes.com/interactive/2018/06/03/technology/facebook-device-partners-users-friends-data.html https://www.nytimes.com/2018/12/18/technology/facebook-privacy.html Other coverage https://www.slashgear.com/why-facebook-whatsapp-instagram-cross-service-encryption-cant-happen-25563705/ https://www.wired.com/story/facebook-messenger-whatsapp-instagram-chat-combined-encryption-identity/ https://slate.com/technology/2019/01/facebook-messenger-instagram-whatsapp-encryption.html?via=gdpr-consent https://www.ibtimes.com/facebook-instagram-whatsapp-integration-project-creates-challenges-opportunities-2758430 Advertisers are all happy for this https://mobilemonkey.com/blog/2019/01/facebook-messenger-instagram-whatsapp-need-to-know https://www.wired.com/story/facebook-messenger-whatsapp-instagram-chat-combined-encryption-identity/ Credits: CO.AG Musichttps://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA Chuki Beats https://www.youtube.com/user/CHUKImusic Follow me: https://twitter.com/The_HatedOne_ https://www.bitchute.com/TheHatedOne/ https://www.reddit.com/r/thehatedone https://www.minds.com/The_HatedOne The footage and images featured in the video were for critical analysis, commentary and parody, which are protected under the Fair Use laws of the United States Copyright act of 1976.
Views: 14854 The Hated One
Byzantine Agreement
Google Tech Talks August 3, 2007 ABSTRACT Byzantine Agreement is a fundamental problem in distributed computing, that is--design a protocol to bring processors to agreementon a bit despite a fraction of bad processors behaving to disrupt the outcome. First proposed in 1980, it was proved impossible to solve deterministically which launched some of the early work on randomized algorithms. As the only (randomized) solutions for synchronous and asynchronous environments were resp., nearly linear time or exponential time, or required assumptions of private channels, this spurred the field of cryptography to develop concepts like multiparty secure computation. We have designed a distributed...
Views: 11344 GoogleTechTalks
What is DNS Spoofing? | Explained with Practical
Hello Guys, in this video I am gonna show u what is DNS Spoofing... I have covered the definition along with Practical. 02:49 -Time Stamp of Practical. Link to My Blog:- http://techdjdey.blogspot.in/ My Facebook Page:- https://www.facebook.com/Dhrubajyoti-dey-593780087403430/ Follow me on Twitter:- https://twitter.com/dhrubadey222 Video Editor used:- HitFilm 4 Express. https://hitfilm.com/ Screen Recorder used:- iSpring Free Cam 8. https://www.ispringsolutions.com/ispring-free-cam Music:- Elektronomia-Sky High. https://www.youtube.com/watch?v=TW9d8vYrVFQ PLEASE LIKE AND SHARE THIS VIDEO. SUBSCRIBE to my Channel here:- https://www.youtube.com/channel/UCFKcqq9IOdwHdgfq6GEL8gw?sub_confirmation=1 My other videos:- https://www.youtube.com/channel/UCFKcqq9IOdwHdgfq6GEL8gw/videos IGNORE THESE BELOW: what is dns spoofing, what is dns spoofing attack
Views: 471 Dhrubajyoti Dey
Discovering Satoshi: Dr. Adam Back
Thinking about purchasing a Ledger Nano Hardware Wallet? Browse their official website: https://www.ledgerwallet.com/r/67ef Want to join coinbase to begin your crypto journey? Here’s a link to get free $10: https://www.coinbase.com/join/558828dc34383271a500003b Step up your game and Check Out Binance too: https://www.binance.com/?ref=10080191 Join the Robinhood app and invite your friends to Robinhood and win free stock. Here's my invite: http://share.robinhood.com/heidic1 Find me on Steemit: www.steemit.com/@heiditravels Twitter: @blockchainchick Instagram: @hheidiann If you’re looking for an app that tracks the price of BTC & ETH and many other coins, check out the CoinView App: https://play.google.com/store/apps/details?id=br.com.freeflowt.coinview LINKS FOR ADDITIONAL READING FOR THIS VIDEO & ALL INFO IN TEXT DOWN BELOW “Hashcash a Denial of Service Counter-Measure” by Adam Back: http://www.hashcash.org/papers/hashcash.pdf 5-Part Interview with Trace Mayer: https://www.weusecoins.com/adam-back-cypherpunks/ Join the Cypherpunks Email list: http://www.cypherspace.org/adam/cp.html As we continue our journey of learning about the individuals who were influential in the time leading up to the creation of Bitcoin, we have now come to learn about Dr. Adam Back. He is another one of those cypherpunks who developed systems that are now being used in the Bitcoin network. He was mentioned in the Bitcoin white paper and also the Tor white paper for the work he did on a similar, prior network called Freedom Network. Dr. Back contributed a big one for Bitcoin, hashcash. If that name doesn’t ring a bell, I bet proof-of-work does, in fact, Satoshi Nakamoto gave him credit for his contributions in the Bitcoin white paper. Dr. Back developed hashcash back in 1997, about 11 years before bitcoin. It was initially used to prevent email spam. The hashcash system for email use would create stamps that would be attached to emails and establish a micropayment type of system which would help to deter spam. I will be going into greater detail about hashcash, defining what a hash is and how proof-of-work actually works in my next video so if that’s something you’ve been curious to learn more about be sure to hit subscribe and click on that bell thing to get notified when that video comes out in the next couple days. In the meantime, there is a really interesting 5-part interview series that Trace Mayer hosted with Dr. Back I’ll include links down below so you can check them out for yourself, but in it he describes his time spent in college and how it was around the time that PGP, or “Pretty Good Privacy” had been released by Phil Zimmerman. This is was when the cypherpunks really started to kick things into gear. The realization that they can bring about social change in a much more direct way must have been a powerful moment. As Dr. Back explains in this interview, the Constitution was written to protect many rights, the first of which is the freedom of speech. Back in the day, the modes for speaking and communicating with one another were much more intimate, and perhaps easier to protect in this way. Now, in this new era of technology, speech and communication is more commonly done in a remote way. This in turn requires new methods of protecting our freedom. Dr. Back recalls how many different countries were attempting to control or even prohibit the use of encryption by individuals. Which of course is a great way to ensure your ability to speak freely across these new types of channels of communication. The old way of doing things, the political way, means you lobby to those in power and hope that you’ve paid enough to satisfy them. You hope that the political system will work in your favor. The cypherpunks way removed all of that B.S. They write code. They don’t ask for permission, they release it to the public and let society realize that there are human rights that need to be protected. In this way there is at least a chance for real social change. He says, “…what ultimately changes the game is the deployment of technology.” And boy do they ever deploy technology. The amount of work and collaboration that had taken place, and still takes place on these anonymous email lists is enough to renew your hope for the future. Again, this interview series is a great way to get a better feel for what it was like in the early days with these innovators like Dr. Adam Back, Wei Dai, Satoshi Nakamoto, Hal Finney, Nick Szabo and a number of others.
Views: 1994 Crypto Tips
Crypto Currency | Blockchain | Bitcoins
A cryptocurrency (or crypto currency) is digital asset designed to work as a medium of exchange that uses strong cryptography to secure financial transactions, control the creation of additional units, and verify the transfer of assets. Cryptocurrency is a kind of digital currency, virtual currency or alternative currency. Cryptocurrencies use decentralized control[4] as opposed to centralized electronic money and central banking systems.The decentralized control of each cryptocurrency works through distributed ledger technology, typically a blockchain, that serves as a public financial transaction database. Bitcoin, first released as open-source software in 2009, is generally considered the first decentralized cryptocurrency.Since then, over 4,000 altcoin (alternative coin) variants of bitcoin have been created. According to Jan Lansky, a cryptocurrency is a system that meets six conditions: The system does not require a central authority, distributed achieve consensus on its state [sic]. The system keeps an overview of cryptocurrency units and their ownership. The system defines whether new cryptocurrency units can be created. If new cryptocurrency units can be created, the system defines the circumstances of their origin and how to determine the ownership of these new units. Ownership of cryptocurrency units can be proved exclusively cryptographically. The system allows transactions to be performed in which ownership of the cryptographic units is changed. A transaction statement can only be issued by an entity proving the current ownership of these units. If two different instructions for changing the ownership of the same cryptographic units are simultaneously entered, the system performs at most one of them. Altcoin The term altcoin has various similar definitions. Stephanie Yang of The Wall Street Journal defined altcoins as "alternative digital currencies,"while Paul Vigna, also of The Wall Street Journal, described altcoins as alternative versions of bitcoin.Aaron Hankins of the MarketWatch refers to any cryptocurrency other than bitcoin as altcoins. Blockchain Main article: Blockchain The validity of each cryptocurrency's coins is provided by a blockchain. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography.Each block typically contains a hash pointer as a link to a previous block,a timestamp and transaction data. By design, blockchains are inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority. Blockchains are secure by design and are an example of a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been achieved with a blockchain. It solves the double spending problem without the need of a trusted authority or central server. The block time is the average time it takes for the network to generate one extra block in the blockchain.Some blockchains create a new block as frequently as every five seconds.By the time of block completion, the included data becomes verifiable. This is practically when the money transaction takes place, so a shorter block time means faster transactions.[citation needed] Timestamping Cryptocurrencies use various timestamping schemes to avoid the need for a trusted third party to timestamp transactions added to the blockchain ledger. Proof-of-work schemes The first timestamping scheme invented was the proof-of-work scheme. The most widely used proof-of-work schemes are based on SHA-256 and scrypt. The latter now dominates over the world of cryptocurrencies, with at least 480 confirmed implementations.
Views: 22 G-QUBE Tweak
What Is A Secure Socket Layer?
https://goo.gl/6U6t22 - Subscribe For more Videos ! For more Health Tips | Like | Comment | Share : ▷ CONNECT with us!! #HealthDiaries ► YOUTUBE - https://goo.gl/6U6t22 ► Facebook - https://goo.gl/uTP7zG ► Twitter - https://twitter.com/JuliyaLucy ► G+ Community - https://goo.gl/AfUDpR ► Google + - https://goo.gl/3rcniv ► Visit us - http://healthaware.in/ ► Blogger - https://juliyalucy.blogspot.in/ Watch for more Health Videos: ► How To Avoid Unwanted Pregnancy Naturally: https://goo.gl/hRy93e ► Period Hacks || How To Stop Your Periods Early: https://goo.gl/dSmFgi ► Cold and Flu Home Remedies: https://goo.gl/biPp8b ► Homemade Facial Packs: https://goo.gl/NwV5zj ► How To Lose Belly Fat In 7 Days: https://goo.gl/EHN879 ► Powerfull Foods for Control #Diabetes: https://goo.gl/9SdaLY ► Natural Hand Care Tips At Home That Work: https://goo.gl/YF3Exa ► How to Tighten #SaggingBreast: https://goo.gl/ENnb6b ► Natural Face Pack For Instant Glowing Skin: https://goo.gl/gvd5mM ► Get Rid of Stretch Marks Fast & Permanently: https://goo.gl/ZVYvQZ ► Eating Bananas with Black Spots: https://goo.gl/gXuri6 ► Drink this Juice every day to Cure #Thyroid in 3 Days: https://goo.gl/L3537H ► How Garlic Improves Sexual Stamina? https://goo.gl/GNcbYU ► Benefits of using Egg Shells: https://goo.gl/hAUyUS ► Home Remedies to Gain Weight Fast: https://goo.gl/jBVVQh ► Amazing Benefits of Olive Oil for Health: https://goo.gl/R3583v ► Rapid Relief of Chest Pain (Angina): https://goo.gl/idAFZR ► Home Remedies for Joint & Arthritis Pains Relief: https://goo.gl/jRbNkh ► SHOCKING TRICKs For #Diabetes Control: https://goo.gl/ATDDsV ► Doctors Are Shocked! #Diabetics: https://goo.gl/ZeQddJ ► Home Remedies for Gastric Troubles: https://goo.gl/72VR1b ► Juice for #Diabetics Type 2: https://goo.gl/3vDMqR --------- Ssl uses a cryptographic system that two keys to encrypt data. Usually, when you are asked to 'log in' on a website, the resulting page is secured by ssl. As organizations provide more mar 19, 2014. Outlook) ssl (secure sockets layer) is the standard security technology for establishing an encrypted link between a web server and browser. Secure sockets layer (ssl)? Definition from techopedia. Why ssl? The purpose of using ssl certificates shopper. What is secure sockets how does socket layer (ssl or tls) work? Luxsci. To enable ssl on a website, you will need to get an certificate that identifies and install it your web server. An ssl session always begins with an exchange of (secure sockets layer) is a protocol that provides secure communications on the internet for such things as web browsing, e mail, instant messaging, and other data transfers. Digicert secure sockets layer (ssl) is a standard security technology for establishing an encrypted link between server and client typically web (website) browser, or mail (e. Ssl is a secure protocol developed for sending information securely over the internet. Ssl (secure sockets layer)? What is ssl? Ssl information and faq. This link ensures that all data passed between the web server and browsers remain private integral nov 16, 2016 secure sockets layer (ssl) protocol authenticates encrypts application transmissions clients servers over internet was most widely deployed cryptographic to provide security communications before it preceded by tls (transport security) in 1999. Ssl uses transport control protocol (tcp) for ssl is the backbone of our secure internet and it protects your sensitive information as travels across world's computer networks. The usage of ssl technology ensures that all data transmitted between the web server and browser remains encrypted (secure sockets layer) certificates are an integral part website security. It is used by many websites to protect the online transactions of their secure sockets layer (ssl) a protocol for transmitting private documents via internet. Moving your business online provides the convenience and accessibility customers partners demand, helping you to stand out from competition. Ssl is the predecessor to transport layer security (tls) secure sockets (ssl) a standard protocol used for transmission of documents over network. What is secure sockets what layer (ssl)? Webopedia definition. What is secure sockets layer (ssl)? Definition from whatis what ssl? . Ssl is available for email, chat. It is used by many websites to protect the online transactions of their jul 22, 2013 ssl (secure socket layer) standard secure internet communications. When you visit a website with ssl, the site's ssl certificate enables to encrypt data send such as credit card information, names or addresses so it can't be accessed by hackers transport layer security (tls) and its predecessor, secure sockets (ssl), are cryptographic protocols that provide communications over compu
Views: 16 Fredda Winkleman
The IPS Compiler: Optimizations, Variants and Concrete Efficiency (Crypto 2011)
Yehuda Lindell, Eli Oxman, and Benny Pinkas Dept. of Computer Science, Bar Ilan University, Ramat Gan, Israel Abstract. In recent work, Ishai, Prabhakaran and Sahai (CRYPTO 2008) presented a new compiler (hereafter the IPS compiler) for constructing protocols that are secure in the presence of malicious adversaries without an honest majority, from protocols that are only secure in the presence of semi-honest adversaries. The IPS compiler has many important properties: it provides a radically different way of obtaining security in the presence of malicious adversaries with no honest majority, it is black-box in the underlying semi-honest protocol, and it has excellent asymptotic efficiency. In this paper, we study the IPS compiler from a number of different angles. We present an efficiency improvement of the "watchlist setup phase" of the compiler that also facilitates a simpler and tighter analysis of the cheating probability. In addition, we present a conceptually simpler variant that uses protocols that are secure in the presence of covert adversaries as its basic building block. This variant can be used to achieve more efficient asymptotic security, as we show regarding black-box constructions of malicious oblivious transfer from semi-honest oblivious transfer. Finally, we analyze the IPS compiler from a concrete efficiency perspective and demonstrate that in some cases it can be competitive with the best efficient protocols currently known.
Views: 292 TheIACR
All About Cryptocurrencies & Bitcoins | In 5 Minutes
In this 5 minutes, you are going to know pretty much all about Crypto Currencies and Bitcoins. What are Bitcoins? How do they work? Their Past to their future, everything! ---------------------------------------------------------------------------------------------------------------- TIMESTAMPS:- Introduction To Bitcoins: 00:45 Definition Of Crypto Currencies: 01:23 Working & Difference With Other Currencies: 01:43 Security Aspect Of Bitcoins: 03:04 Making Of Bitcoins: 03:22 Protocols By Satoshi Naka Moto: 04:03 Value Of Bitcoins: 04:31 Conclusion: 05:08 ---------------------------------------------------------------------------------------------------------------- Links:- The article related to Cryptocurrencies & Bitcoins: https://suggestmetech.wordpress.com/2018/02/11/all-about-crypto-currencies-bitcoins/ Controlled Supply: https://goo.gl/eXjChS Detailed Article About Bitcoin Mining: https://goo.gl/JJNX1Q ---------------------------------------------------------------------------------------------------------------- Credits:- Script: Souvik Ganguly Editing: Souvik Ganguly Voice: Souvik Ganguly Subtitles: Sourodip Bose Music: 1) Finding the Balance by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100708 Artist: http://incompetech.com/ 2) Home Base Groove by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100563 Artist: http://incompetech.com/ 3) Pooka- Kevin MacLeod Source: Youtube Audio Library Video Clippings: Pixabay [ Link: https://pixabay.com/ ] ----------------------------------------------------------------------------------------------------------- Reach Us on :- Facebook: https://www.facebook.com/smtlovers/ Twitter: https://twitter.com/suggestmetech S.M.T Web Page:- https://suggestmetech.wordpress.com/ ---------------------------------------------------------------------------------------------------------------- THANKS FOR WATCHING ----------------------------------------
Views: 188 Suggest Me Tech
David Mazières: "The Stellar Consensus Protocol" | Talks at Google
David Mazières: "The Stellar Consensus Protocol: A Federated Model for Internet-level Consensus" This talk presents federated Byzantine agreement (FBA), a generalization of the standard Byzantine agreement problem. Unlike traditional Byzantine agreement--which presupposes unanimous agreement on system membership--the FBA model grants organizations individual control over whom to trust, allowing membership to grow organically out of pairwise relationships between participants. Compared to proof-of-work and proof-of-stake, two other decentralized alternatives to Byzantine agreement, FBA enables far more efficient constructions with greater margins of computational security. The talk further presents the Stellar consensus protocol (SCP), the first FBA protocol. SCP forms the backbone of the Stellar payment network, where it secures financial transactions. Other potential applications include secure timestamping and strengthening certificate transparency.
Views: 32279 Talks at Google
One-time Password Algorithms - CompTIA Security+ SY0-401: 5.2
Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - A useful security authentication technique is the use of one-time passwords. In this video, you’ll learn how one-time passwords are implemented and the differences between the HOTP and TOTP algorithms. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 31256 Professor Messer
RSTV Exclusive- Timestamping Modelling Tuska
Exclusive from the RSTV Twitch Stream on the 27th January, TimeStamping- Modelling Tuska for the upcoming RuneScape World Event.
Views: 96 DXgaming
What is DIGITAL SIGNATURE? What does DIGITAL SIGNATURE mean? DIGITAL SIGNATURE explanation. A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or documents. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, that the sender cannot deny having sent the message (authentication and non-repudiation), and that the message was not altered in transit (integrity). Digital signatures are a standard element of most cryptographic protocol suites, and are commonly used for software distribution, financial transactions, contract management software, and in other cases where it is important to detect forgery or tampering. Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature, but not all electronic signatures use digital signatures. In some countries, including the United States, India, Brazil, Saudi Arabia, Switzerland and the countries of the European Union, electronic signatures have legal significance. Digital signatures employ asymmetric cryptography. In many instances they provide a layer of validation and security to messages sent through a nonsecure channel: Properly implemented, a digital signature gives the receiver reason to believe the message was sent by the claimed sender. Digital seals and signatures are equivalent to handwritten signatures and stamped seals. Digital signatures are equivalent to traditional handwritten signatures in many respects, but properly implemented digital signatures are more difficult to forge than the handwritten type. Digital signature schemes, in the sense used here, are cryptographically based, and must be implemented properly to be effective. Digital signatures can also provide non-repudiation, meaning that the signer cannot successfully claim they did not sign a message, while also claiming their private key remains secret; further, some non-repudiation schemes offer a time stamp for the digital signature, so that even if the private key is exposed, the signature is valid. Digitally signed messages may be anything representable as a bitstring: examples include electronic mail, contracts, or a message sent via some other cryptographic protocol.
Views: 1822 The Audiopedia
The Future of Crypto - Interview with Mario Pazos of Security Token Partners
Thanks to the advice of Mario Pazos, industry expert and founder of Security Token Partners, this is going to be one of the most important videos on security tokens and the future of the crypto markets that you'll ever watch. Here are clickable time stamps to important sections of the interview: Roadmap to Mario Pazos -- 1:02 Do you only invest in ICOs or also post-launch token projects? -- 5:25 How security tokens will affect institutional/retail traders & exchanges -- 9:47 One of Mario's standout projects -- 13:11 Potential issues with security tokens and the SEC -- 21:19 Final comments -- 26:22 During our last video, I touched upon the importance of security tokens. Mario Pazos has become a commanding figure in the security token space, helping blockchain companies like Kairos structure both security and utility token offerings. Here are some of the questions and answers from the interview: How did you end up here? On November 2016, he became an angel investor and his initial participation was in the cannabis industry. This allowed him [via an equity investment] to get involved with a company that was trying to solve the traditional payment problem cannabis companies face using block chain technology. That company was Metal, and eventually Mario was also granted tokens as a result (token symbol: MTL). After that, he started managing a small angel investment fund of about $150,000, which eventually grew to close to $5 million. Do you strictly invest in ICOs or do you also buy tokens post-launch for projects you believe in? Pazos investment strategy was initially focused on Dapps and is now focused on protocols. Nevertheless, he still invests in both ICOs and existing industry-disruptive projects. Mario is a strong believer in security tokens disrupting the capital markets, because for a first time in history we're going to be able to have private equity markets liquid [on a funny note highlighting the crypto market's need for liquidity, I mentioned my experience as a day trader when I moved the market on PACcoin with just a $5,000 order!]. What are your thoughts on how security tokens will not just affect institutional traders, but also the exchanges and the retail market? Mario Pazos believes that we're currently experiencing “Wall Street 2.0” and that there are three principal changes that will make it happen: 1) A new set of investors (new institutional money coming in), 2) new set of projects (both blockchain and non-blockchain related), and 3) new crypto exchanges and sources of liquidity (the real game changer in the space). Which was one of your standout projects, what drew you in on it, and what was your thought process? Mario's moment of awakening took place 8-9 months ago when he read an article from Spice VC's founder Carlos Domingo on how tokenizing VC funds would disrupt the venture capitalist market forever. That allowed him to leverage off Spice VC to bring his first major security token deal involving facial recognition firm Kairos to market, which is raising $30 million with over $1.5 billion in reservations. Kairos actually was one of the first dual-token offerings in the world, with both a security token and a utility token. Do you see any issues with security tokens and the SEC? Mario acknowledges that it's very difficult to navigate the compliance waters in the crypto token space, but when it comes to security tokens, you can currently use the exemptions under the JOBS Act of 2012 to issue the securities. Nevertheless, it's difficult to know if the SEC will create a new framework for the asset class going forward or be extremely restrictive and not allow US investors to participate in the crypto market. Nevertheless, regardless of the direction the SEC goes, there will definitely be a shift towards security tokens. Any final comments or projects that you're excited about that you may want to wrap up with? Mario Pazos expressed the importance of being very selective when working with companies in the security token space, since they are in this market for the long term and want to see the market flourish and develop in the right direction. Focusing on the get-rich-quick mentality of 2017 is a mistake and investors need to look at what's ahead and focus on that instead. What do you think of the security token space in 2018 and what the position that the SEC takes will be? Comment below. If you have any questions for Mario Pazos, make sure to list them as well. Use Some of These Links to Help you Get Started: Open an Account and Start Trading Cryptos on Binance: https://goo.gl/8GYe82 Protect Your Cryptos with a Trezor Wallet: https://goo.gl/XtrCJv Access the Pro Version of the Tradingview Platform: https://goo.gl/5E3j6h Our Trading Analysis on Tradingview: https://www.tradingview.com/u/cryptoplayhouse/ Follow us on Instagram: https://www.instagram.com/cryptoplayhouse/ Follow us on Facebook: https://www.facebook.com/cryptoplayhouse/
Views: 470 Crypto Playhouse
Irrecoverable Vs Recoverable Schedules in Transactions | DBMS
#RecoverablevsIrrecoverable#DBMS#freeEducationGATE Difference between recoverable and irrecoverable schedules with example. Imp for GATE, UGC NET and other competitive exams.
Views: 4374 Gate Smashers
Blockchain smart contracts explained - Bitbond #TOA17
https://www.bitbond.com Blockchain smart contracts tutorial Blockchain Smart Contracts explained - presented by Bitbond CEO Radoslav Albrecht at this years Tech Open Air Festival in Berlin. This event was hosted by The Place. Table of content: A Primer on Blockchain Technology @ 1:55 An introduction to Smart Contracts @ 12:50 Use cases of Smart Contracts @ 26:43 Q&A @ 43:54 A Primer on Blockchain Technology @ 1:55 The concept of Blockchain was first discussed in Satoshi Nakomoto’s whitepaper called, Bitcoin: A Peer to Peer Electronic Cash System. In this whitepaper Nakomoto discusses the need for a cryptographically secured form of digital cash. Up until then, all forms of digital money had faltered due to the ‘double spend’ problem. This described how all digital assets could be infinitely copied and are therefore rendered worthless. By creating the Blockchain, Nakomoto solved this problem. Blockchain in its simplest form, is a record of transactions sorted into blocks. These transactions are time-stamped within the blocks which are each immutably linked to the preceding block. By creating this link, the blocks are made tamper-proof, as changing one transaction in one of the blocks would require all preceding blocks to be changed as well. The Blockchain therefore leverages the power of the internet to facilitate the exchange of value across borders. Companies like Bitbond use this to facilitate both international fixed income investments (https://www.bitbond.com/fixed-income-investments), and small business loans (https://www.bitbond.com/small-business-loans). What are Smart Contracts? 12:50 Smart Contracts are “If this, then that” statements written into the blockchain. They allow for the exchange of money, properties, shares and anything else of value, without the use of an intermediary. Perhaps the easiest way to understand the function of a Smart Contract, is to compare it to the way a vending machine works. If you choose an item from the vending machine for example and input money, then the item falls into the grate and becomes available to you. It does not become available to you until you input the money, which in this case, is the event that triggers the action (the item falling into the grate). Similarly, a Smart Contract is an immutable agreement between two parties to trigger a certain action at a predefined event. If for example, you paid into a disaster relief fund designed to help those affected by earthquakes, you could create a Smart Contract which pays out the money when a certain predefined level of tectonic movement is measured which is indicative of an earthquake. This has several important advantages, chief among them being the removal of intermediaries and the automation of processes which otherwise may be expensive or open to fraud. As a result, individuals can take further control of their assets through the Blockchain. How do Smart Contracts work? Smart Contracts currently work primarily on the Ethereum Blockchain. In fact, founder Vitalik Buterin, wrote the Ethereum Blockchain in a programming language called Solidity which is explicitly designed for Smart Contracts. In this video, we provide the outlines of a Smart Contract tutorial to help you get started with the technology. Specifically, Smart Contracts work in three steps: 1. Two parties agree on terms 2. A predefined event occurs 3. The event triggers and action (payout) With these three steps in mind, it becomes that smart contracts not only define the rules of an agreement in the same way that a traditional contract does, but also automatically enforces those obligations through the execution of code. How can I use a Smart Contract? 21:10 In this presentation, Radoslav Albrecht provides a detailed explanation of not only what a Smart Contract is, but also how a layperson may set one up on his own. Specifically, he mentions three browser plugins: 1. Parity 2. Metamask 3. Mist These three plugins are probably the easiest way for people, who may not be developers, to interact with, and learn about Smart Contracts on the Blockchain. To set up your own Smart Contract, you can visit dealmate.io. This website is a relatively light-weight solution which will let you set up your first basic Smart Contract for free and without the need for code. Simply enter your desired parameters and have dealmate generate the code for you. You will need the Metamask plugin to use dealmate. Developers can also create Smart Contracts on the Ethereum Blockchain directly by learning a programming language called Solidity. ----------------------- Relevant links: https://www.bitbond.com https://toa.berlin/ http://theplaceberlin.com/ https://parity.io/ https://metamask.io/ https://github.com/ethereum/mist https://en.wikipedia.org/wiki/Solidity https://ethereumbuilders.gitbooks.io/guide/content/en/solidity_tutorials.html http://dealmate.io/
Views: 1134 Bitbond
Bitcoin Q&A: The out-of-sync hype around "blockchain"
Keywords/phrases: The hype around "blockchain" is out of sync with the actual implementations. There is one exception: Bitcoin (maybe two, Ethereum). The hype stems from the general economic conditions of free money, stimulus, and low-interest rates. We have a lot of money chasing very little yield where people chase investment exuberances. The blockchains worth the hype are the ones setting the stage for real-world applications. Open, transnational, borderless, open access, permissionless blockchains. There is a lot of hype but there is also a seven-year experiment that refuses to die.
Views: 1544 aantonop
Cryptographic Hash Functions
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 12704 nptelhrd
Blockchain tutorial 6: Digital signature
This is part 6 of the Blockchain tutorial explaining what a digital signature is. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 16485 Mobilefish.com
What is a Digital Signature?
This channel introduces the "e-Estonia" - a term commonly used to describe Estonia's emergence as one of the most advanced e-societies in the world. You can learn more about Estonian ICT and technology by watching the videos, visiting our homepage http://e-estonia.com or follow us on FB e-Estonia .You can also book a visit and live demo at Estonian ICT Demo Center in Tallinn and establish business contacts with Estonian ICT companies.
Views: 224980 e-estonia
How Bitcoin Works in 5 Minutes (Technical)
A short introduction to how Bitcoin Works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Written Version: http://www.imponderablethings.com/2014/04/how-bitcoin-works-in-5-minutes.html Less technical version: https://www.youtube.com/watch?v=t5JGQXCTe3c Donation address: 1K7A6wsyxj6fThtMYcNu6X8bLbnNKovgtP Germain caption translation provided by adi331 : 19s6rqRfHa19w7wcgwtCumPs1vdLDj1VVo (thanks!!)
Views: 5666695 CuriousInventor
Online CryptoCurrency Calculator with multi-Cryptocurrencies Simple Bitcoin Converter
Simple Bitcoin Converter http://preev.com/ https://gobitcoin.io/tools/lite/ https://coinmarketcap.com/converter/ https://www.xe.com/currencyconverter/ Crypto exchange rate calculator helps you convert prices online between two currencies in real-time. Online CryptoCurrency Calculator with multi-Cryptocurrencies. Cryptocurrency converter, calculator. Convert cryptocurrencies to fiat currencies, know the values. Real time cryptocurrency converter let you convert all. Online currency & cryptocurrencies exchange rates calculator helps you convert anything in real-time. The Universal Currency Converter allows you to convert any fiat or crypto currency into any other currency instantly. CRYPTOCURRENCY CONVERTER. List and live prices. Convert Bitcoin and all Altcoin in US dollars. Cryptocurrency Converter and Calculator Tool| CoinMarketCap Currency converter with live rates for all currencies. Free exchange rates. Saves settings for next use. Currency converter , money converter, See the live Bitcoin price. Convert amounts to or from USD and other currencies with this simple Bitcoin calculator. Currency Converter | Foreign Exchange Rates bitcoin calculator, bitcoin converter, bitcoin cost, bitcoin exchange rate, bitcoin price, bitcoin rate, bitcoin value, bitcoin worth What is Bitcoin? Bitcoin Bitcoin is a cryptocurrency, a form of electronic cash. It is a decentralized digital currency without a central bank or single administrator that can be sent from user-to-user on the peer-to-peer bitcoin network without the need for intermediaries. What is Ripple? Ripple Ripple is a real-time gross settlement system, currency exchange and remittance network created by Ripple Labs Inc., a US-based technology company. What is Ethereum? Ethereum Ethereum is an open-source, public, blockchain-based distributed computing platform and operating system featuring smart contract functionality. It supports a modified version of Nakamoto consensus via transaction-based state transitions. What is Blockchain? Blockchain A blockchain, originally block chain, is a growing list of records, called blocks, which are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. By design, a blockchain is resistant to modification of the data. What is Dogecoin? Dogecoin Dogecoin is a cryptocurrency featuring a likeness of the Shiba Inu dog from the "Doge" Internet meme as its logo. Introduced as a "joke currency" on 6 December 2013, Dogecoin quickly developed its own online community and reached a capitalization of US$60 million in January 2014 What is Litecoin? Litecoin Litecoin is a peer-to-peer cryptocurrency and open source software project released under the MIT/X11 license. Creation and transfer of coins is based on an open source cryptographic protocol and is not managed by any central authority. Litecoin was an early bitcoin spinoff or altcoin, starting in October 2011. What is Steem? Steem Steam is a digital distribution platform developed by Valve Corporation for purchasing and playing video games. Steam offers digital rights management, matchmaking servers, video streaming, and social networking services. litecoin mining blockchain for dummies buy litecoin litecoin wallet litecoin value litecoin predictions litecoin price history litecoin reddit litecoin vs bitcoin bitcoin account how to get bitcoins bitcoin login bitcoin buy how to use bitcoin bitcoin mining bitcoin chart bitcoin wiki ethereum value ethereum wallet ethereum coin ethereum wiki ethereum meaning ethereum mining ethereum price predictions ethereum buy blockchain login blockchain definition blockchain wiki blockchain tutorial blockchain explained blockchain app blockchain technology wiki steem wallet steem dollars steem coin news steem dollar price steem coin price steemit sign up steem to usd steem meaning Cryptocurrency Converter Calculator cryptocurrency calculator profit convert cryptocurrency to cash cryptocurrency converter app cryptocurrency calculator app crypto calculator online cryptocurrency exchange rate crypto profit calculator cryptocurrency prices currency converter calculator currency exchange rate currency exchange rates currency converter app btc to usd exact btc to usd 0.01 btc to usd .0024 btc to usd simple bitcoin calculator coinbase Popular Cryptocurrency Conversions BTC to USD BTC to AUD BTC to BRL BTC to CNY BTC to GBP BTC to INR BTC to JPY BTC to KRW BTC to RUB ETH to USD ETH to AUD ETH to BRL ETH to CNY ETH to GBP ETH to INR ETH to JPY ETH to KRW ETH to RUB XRP to USD XRP to AUD XRP to BRL XRP to CNY XRP to GBP XRP to INR XRP to JPY XRP to KRW XRP to RUB BCH to USD BCH to AUD BCH to BRL BCH to CNY BCH to GBP BCH to INR BCH to JPY BCH to KRW BCH to RUB https://www.youtube.com/channel/UCdqcK3K7r5SNt1X9xxjLf8Q/sub_confirmation=1
Views: 161 aikm28
BLOCKCHAIN - WikiVidi Documentary
A blockchain, originally block chain, is a growing list of records, called blocks, which are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data . By design, a blockchain is resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for inter-node communication and validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without alteration of all subsequent blocks, which requires consensus of the network majority. Although blockchain records are not unalterable, blockchains may be considered secure by design and exemplify a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been... http://www.wikividi.com ____________________________________ Shortcuts to chapters: 00:02:00 History 00:05:08 Structure 00:06:24 Blocks 00:08:13 Block time 00:08:48 Decentralization 00:10:33 Openness 00:11:56 Permissionless 00:13:07 Permissioned (private) blockchain 00:13:46 Disadvantages of private blockchain 00:14:59 Uses 00:15:33 Smart contracts 00:16:06 Banks ____________________________________ Copyright WikiVidi. Licensed under Creative Commons. Wikipedia link: https://en.wikipedia.org/wiki/Blockchain
Bitcoin White Paper Explained | Study Session | TruStory (2018)
Preethi Kasireddy, Founder and CEO of TruStory, explains TruStory’s mission and hosts a study session reviewing Bitcoin’s White Paper. Join the TruStory Expert Community today https://boards.greenhouse.io/trustory... Part 1: TruStory's Mission TruStory’s Mission [2:18] How a story works in TruStory [3:36] Examples of stories not suited for TruStory [5:09] What makes a story valid on TruStory’s platform [7:25] Fundamental goals of the Experts Program [8:06] Part 2: Bitcoin White Paper Review Nonreversible transactions [11:12] Definition of an electronic coins; process of transactions explained [13:39] What are nodes? [16:39] What’s the purpose of timestamps? [16:52] How the Proof of Work puzzle works [18:16] What are the odds that two nodes broadcasting different versions of the next block simultaneously?[22:33] How much would a 51% attack cost? [27:47] What happens when there are no more block rewards? [29:32] The usefulness of Merkle trees [35:23] Block header calculation [36:52] How is blockchain a specific instance of a distributed ledger? [39:05] Should you generate new address for your private key for every transaction [43:00] Why the probability of an an attacker attacking the bitcoin system is negligible [45:13] Combining and splitting value [47:50] Sybil resistance explained [50:28] _______________________________________________________________________ For more study sessions with TruStory, check out these links: Distributed Systems and Consensus: https://www.youtube.com/watch?v=WndYl3wUzYM Critiquing Stories and Evidence: https://www.youtube.com/watch?v=9iiRR9FqrJo&t=828s Connect with us: If you have questions, post em to our Discourse: https://discourse.trustory.io/ If you find false claims, @ us on Twitter: https://twitter.com/isTrustory If you wanna get updates on TruStory, check out our website: https://www.trustory.io/
Views: 359 Experts @ TruStory
How Bitcoin Works Under the Hood
A somewhat technical explanation of how Bitcoin works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Shorter 5 min introduction: https://www.youtube.com/watch?v=t5JGQXCTe3c Written version: http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html My Bitcoin address: 13v8NB9ScRa21JDi86GmnZ5d8Z4CjhZMEd Arabic translation by Ahmad Alloush Spanish caption translation by Borja Rodrigo, [email protected], DFJWgXdBCoQqo4noF4fyVhVp8R6V62XdJx Russian caption translation by Alexandra Miklyukova Italian voice over: http://youtu.be/1aEf3qr7UdE Italian captions translated by Simone Falcini, 1H5KdCnBooxfqpXtyQBBAKKRU7MkCZCVCe
Views: 2657334 CuriousInventor
2014-11-12 CERIAS - You can hack, but you can't hide: Using log analysis to detect APTs
Recorded: 11/12/2014 CERIAS Security Seminar at Purdue University You can hack, but you can't hide: Using log analysis to detect APTs Kevin Bowers, RSA In my talk I will be describing new techniques developed at RSA Labs to analyze massive log data commonly collected by large enterprises to detect and identify suspicious activity. Unlike common signature-based detection mechanisms used today, our approach leverages behavior patterns that persist across different infection vectors, and is thus more resilient to attacker evasion. Moreover, our techniques are unique in their ability to detect stealthy campaigns in which only a single host sporadically communicates with malicious sites controlled by attackers. Through effective data reduction and algorithms inspired from the graph-theoretic belief propagation model we identify the most suspicious domains contacted by hosts in an organization in different stages of an APT campaign (e.g., initial delivery, infection, command-and-control, etc.). We demonstrate the effectiveness of our techniques against two datasets. The first, a public dataset made available by Los Alamos National Laboratory includes the simulations of APT campaigns overlaid on their DNS traffic. We successfully detect 94% of the campaigns with only a 1% false positive rate. We then apply the techniques to 38TB of web proxy logs collected by a large enterprise to discover hundreds of malicious domains that had bypassed other installed security tools. Kevin Bowers is a Senior Research Scientist and Manager of RSA Laboratories, the security research group at RSA, the Security Division of EMC. He holds a B.S. in Electrical, Computer and Systems Engineering and Computer Science, and a B.S. in Mathematics, both from Rensselaer Polytechnic Institute, as well as an M.S. in Computer Science from Carnegie Mellon University. Kevin has been with RSA Labs since 2007 and his current research is focused on user authentication, breach resilience, and data science for security applications. Kevin�s publication history covers many diverse topics including numerous cryptographic protocols for remote verification of integrity and resilience, time stamping, secure chain-of-custody, as well as advanced authentication techniques and steganography. (Visit: www.cerias.purdue.edu)
Views: 201 ceriaspurdue
Overview on Modern Cryptography
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 35922 nptelhrd
Software Security Tools - CompTIA Security+ SY0-501 - 2.2
Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - A security professional will need to use a large list of software tools. In this video, you’ll learn which tools can be a useful addition to your security toolbag. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 38303 Professor Messer
OpenLaw - "Smart" Token Purchase Agreement
OpenLaw has built a “smart” token purchase agreement, which creates a legally binding agreement to transfer an ERC20 token.
Views: 1919 Aaron Wright
NEO DevCon 2019 DAY 1 Live Streaming 2019/02/16
NEO DevCon 2019 DAY 1 Live Streaming 2019/02/16 Timestamps: 6:42 The Promise of the Smart Economy - Da Hongfei, Founder 42:35 Possible Improvements in NEO 3.0 - Erik Zhang, Founder 1:04:25 NEO Global Growth - Zhao Chen, General Manager, NGD --- Break --- 1:44:44 Blockchain for Digital Transformation - Drew Gude, Managing Director, Microsoft Digital Worldwide 2:06:48 Big Trend in Blockchain - Miha Kralj, Managing Director, Accenture 2:23:42 Regulator’s Perspective in Blockchain - Dr. Joseph Williams, ICT Industry Sector Lead 2:37:00 Blockchain Use Cases and Enterprise Needs on the Microsoft Platform - Pablo Junco, Director, Worldwide Apps Solutions Strategy, Microsoft --- Break --- 4:01:43 NEO Protocol Quality Assurance - Peter Lin, R&D Director, NGD 4:23:35 NEO Developer Guide - Longfei Wang - Software Developer, NGD 4:35:25 Seraph ID – Self-sovereign Identity on NEO - Waldemar Scherer, Head of Enterprise Blockchain 4:54:50 Panel: About Decentralization - Waldemar Scherer; Fabio C.Canesin; Peter Lin; Douwe van de Ruit 5:18:00 Many Ways to Double Spend Your Cryptocurrency - Dr. Zhiniang Peng, Security Researcher, Qihoo 360 5:34:40 Building Trustworthy Blockchain Ecosystems - Dr. Ronghui Gu, Certik, CEO 6:09:51 XLang - Harry Pierson, Program Manager for Xlang, Microsoft 6:30:08 Panel: How to Expand Developer Communities - Brett Rhodes ("Edgegasm") et al. 6:55:00 Cryptoeconomics and the Future of the Global Economy - Dr. Chris Berg, Senior Research fellow, RMIT 7:12:40 NEO.GAME - Blockchain Game One Stop Solution - John Wang, Ecosystem Growth Manager, NGD 7:26:52 NEO Friends Initiative - Tamar Salant, Ecosystem Growth Manager, NGD For more info, please visit: https://devcon.neo.org/
Views: 9293 NEO Smart Economy
How Blockchain Technology is Changing Business
Sam Penfield, Advisory Product Manager at SAS and Joe Green, Associate Chair of the Department of Management and Entrepreneurship, provide an introduction to Blockchain technology and its impact on business. Blockchain was first described in 1991 by Stuart Haber and Scott Stornetta as a methodology to timestamp documents, and only became popular with the introduction of cryptocurrency in 2008. Blockchain technology promises a major disruption to well-established intermediaries including banks, insurance companies, and digital adverting corporations (e.g. Google). In this presentation we will explore what block technology is and how it is expected to change businesses moving forward. Sam Penfield is on a mission to connect, integrate, develop, build, architect solutions that combine SAS technologies, user driven requirements, open-source technologies, and external system amalgamation. With 20+ years’ experience as a consultant and 30+ years developing software Penfield has a true passion for programming languages and problem solving. Recently, Penfield has worked in an emerging technologies group helping with integrating Spark with SAS, prototyping SAS product enhancements and over the last 2+ years has focused on Blockchain technologies and the integration of SAS from a regulatory, data management, and real-time analytics perspective including AI and deep learning. Joe Green, in addition to his university responsibilities, maintains consulting engagements around Big Data; Enterprise Architecture; IT Strategy; and emerging technologies. Green has spent over fourteen years in senior leadership positions within financial services for Bank of America, Capital One, and Wells Fargo. In addition to financial services, he has served in consulting for the last five years with the following organizations: McKinsey & Company, SunTrust Banks, and J.P. Morgan. Currently, Green is serving on a three-year commitment on a joint task force student-level data (enrollment, degree, and course). This project will result in validating the SAT/ACT scores as an early indicator to college success and machine learning around factors of student success and post-graduation outcomes. Research is underway to allow students access to their comprehensive education record, which will be hosted through Blockchain technologies.
Views: 97 Elon TLT
NoizChain ICO review - The future of Advertising😱 AI + Blockhain🤖 | Interview with CEO, Andy Ann 🤓🤓
📢 Name correction 20:18 "Kelvin Cheung - Chief R&D" 🎓NOIZ is the first and only decentralized ad network in the world where participants can engage directly with brands through an AI-enabled cognitive ad system within online and mobile ads. 😱😱😱😱😱😱 ⏰Timestamps ◆ Background/Problem 0:00 ◆ Solution 08:02 ◆ Architecture/Token Utility 08:38 ◆ Roadmap 12:59 ◆ Team review 16:47 ◆ Advisers review 24:17 ◆ Token Metrics 27:54 ◆ Awareness and Hype 29:52 ◆ Final thoughts (1) 30:35 ◆ Interview with Andy Ann (CEO) 33:24 ◆ Final thoughts (2) 45:01 📝Sources Website: https://noizchain.com/ Whitepaper: https://tinyurl.com/yana5397 Telegram: https://t.me/noizchainenglish ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🕺🏻 About Me: ◆Telegram Community!: https://t.me/DecentralisedChain ◆ Twitter: https://twitter.com/Decentralised_C ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 💰 Buy Bitcoin through Coinbase: https://goo.gl/axj2wv 🤑 Binance Exchange: https://goo.gl/hBkdgG 🔐 Recommended wallet - Ledger Nano S: https://goo.gl/R94xLL ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● ⚡ No donations accepted, but if you'd like to support me, please Subscribe, Like and Share the video. ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 💬 I am not a financial adviser and this is not financial advice. I’m just a big fan of all things blockchain and Lego
Views: 422 Decentralised Chain
NEO DevCon 2019 DAY 2 Live Streaming 2019/02/17
NEO DevCon 2019 DAY 2 Live Streaming 2019/02/17 Timestamps: 14:29 Cryptoeconomics and Data Metrics for the Next Market Cycle - Nolan Bauerle, Director of Research,Coindesk 39:20 NEL - bring NEO One Step Closer to Users - Liu Yongxin, Founder, NEL and NNS 50:00 Perspectives on Cryptography, Consensus Mechanisms & High-Performance Computing for NEO 3.0 - Sergei Liubich, Anatoly Bogatyrev --- Break --- 1:35:29 Secure Development in Cryptocurrencies - Fernando Díaz Toledano; Diego Jurado Pallarés 1:49:08 Panel: User Experience and Security Enhancements of NEO Wallets - Merten; Lasky; Knight; DiCarlo 2:11:15 Celer Network: Bring Internet-Scale Adoption to Every Blockchain - Dr. Junda Liu, Co-founder, Celer Network 2:31:56 ONI - A Sharing Infrastructure & Platform - Fu Xiang, Senior System Engineer, Onchain --- Break --- 4:06:58 Distributing Finance for Everyone - Fabio C.Canesin, Co-founder, CoZ and Nash 4:22:16 RegTech for the Smart Economy - Stephen Hyduchak; Alex Guba 4:36:28 The Moonlight Project and Its Future - Alan Fong, Co-Founder, Moonlight.io 4:53:33 Build & Publish Blockchain Game with BlaCat - Sean Chen, Founder, Blacat 5:14:22 Panel: About Blockchain Game - Peterson; Deshpande; Rong; Chen; Rayman 5:34:33 Guardian Circle - Mark Jeffrey, Co-Founder and CEO, Guardian Circle 5:47:10 Owning Your Data - Jonathan Meiri -CEO and Founder, Barrel Protocol --- Break --- 6:20:55 Embrace the New Economy - Joe Zhou, Co-founder, Jarvis+ 6:38:00 Designing a Blockchain-based File Storage System for NEO - Eric Wang, Co-founder, Archon 6:49:55 Stable Coin, an Infrastructure of Blockchain - Chris Qi, CTO, Alchemint 7:17:10 Panel:What You Should Know about STO - Beedham; Myint; Salant; Ng; Tong 7:41:17 How Regtech Prevents Cybercrime with Enhanced Visibility - Alek Tan, CEO, InnoDT Inc. 7:52:27 NEO Health Medical Encyclopedia - Dr. Brad Mattson, Founder, NEO Health For more info, please visit: https://devcon.neo.org/
Views: 6748 NEO Smart Economy
28C3: Electronic money: The road to Bitcoin and a glimpse forward (en)
For more information visit: http://bit.ly/28C3_information To download the video visit: http://bit.ly/28C3_videos Playlist 28C3: http://bit.ly/28C3_playlist Speaker: Peio Popov How the e-money systems can be made better The proposed talk provides a definition of the problem of creating e-money and after a review of the state of the art points out possible solutions and proposes questions for discussion for the properties of electronic money system. Electronic money: The road to Bitcoin and a glimpse ahead Abstract: The proposed talk provides a definition of the problem of creating e-money and after a review of the state of the art points out possible solutions and proposes questions for discussion for the properties of electronic money system. 1. What is electronic money and different means of currency Definition of electronic money and distinction from similar means of exchange. Electronic money is defined as monetary value which is: stored on an electronic device; issued on receipt of funds; and accepted as a means of payment by persons other than the issuer. Working e-money examples: PayPal and MoneyBookers Other means of exchange, similar to e-money: Alternative/Social/Timeshare/Community currencies; Loyalty and Voucher systems. Working examples: WIR and Ven currencies (Bitcoin) What makes them different from e-money? (convertible only one-way, not a legal tender, mostly backed by trust only, etc) Optional: Pros and cons of the abovementioned means of exchange. 2. Defining the e-money problem: What electronic money should do? Risks and requirements to the solution for electronic money from technical, legal and business standpoint. The basic human problem of reaching a consensus and trust in a group. General system risks: Credit Liability Credit Abuse Counterfeiting Unauthorized Withdrawal Purchase Order Modification Double Spending Failure to Credit Payment Denial of Service Repudiation Failure to deliver Framing Secrecy Legal and accounting: Dispute resolution Money laundering and finance of terrorism Tax evasion prevention Consumer protection requirements Ways to negotiate and conclude a contract Auditability Reverse and chargeback transactions How the burden of proof is distributed Business: Costs for: Registration Operation Support Marketing Customer and merchant negotiation Accent on the most important human problems: Identification and authorization (which is the required minimum?) Achieving consensus and easy dispute resolution in a group. Determine the state of the system at any given moment Trust (between the peer users or trust in the central authority) 3. How the risks and requirements have been traditionally addressed? Review of the cryptographic, legal and procedural methods from the existing e-money protocols. Еmphasis on anonymity and privacy problems. The review of the existing systems will be a distinction between: Online and offline systems Example: PayPal and Blind signature/PayWord based systems Centralized and decentralized systems Example: Liberty Reserve and Ripple/BitCoin Hard and Soft systems Example: BitCoin and Credit card based money and payment protocols How do they solve the problems of trust and consensus in a certain group? How they provide anonymous transactions and keep user privacy? Are independent jurisdictions a (contribution to) the solution? Calculated risk, insurance and responsibility/role delegation as patches to the existing problems. Which of the above systems may be deemed "legal"? (what do the central banks think) Optional: Few words for Blind signature and PayWord techniques and the protocols around them 4. The great step forward. The contribution of Bitcoin Emphasis on decentralization and (relative) anonymity features of Bitcoin. How the combination of a way to create(mint) coins and to timestamp the state of their distribtion created the first working non-centralised currency. What, in my opinion, contributed for the Bitcoin popularity. 5. The problems of Bitcoin What Bitcoin doesn't provide or doesn't provide in an effective manner: Cost of creating money Method of reaching a consensus, based on computing power No "real value" to back it Settlement risk not covered Scalability issues All the lacking features of a "soft" currency Is it decentralized or distributed system? (having in mind the introduction of "trust points") 6. A Glimpse forward How can anonymous e-money be made better (more effective and accessible). Proposal (and discussion) of the possible enchancements. How to issue e-money in more effective manner?
Views: 1068 Christiaan008
BlockChain Technology Use in the Commercial Sector
BlockChain is applicable in the following fields of human activity: • Automotive Track truthful, full history of vehicle from pre-production to sale Supply chain parts management • Banking, Financial, Fintech Streamline payments processing with high efficiency, fast and secure transactions Empower global transactions, tearing down national currency borders Minimize auditing complexity for any financial ledger • Charity Tracking donation allocation, accountability, integrity Reduce overhead and complexity of donation payment processing • Cloud Storage Increased security with a shift from centralized data security to decentralized network Lower transactional costs within a decentralized network Crowdsourcing unused cloud storage • Commercial Vehicle and Transportation Tracking journey stops; paired with IoT to create an immutable ledger of trip data • Credit History Make credit reports more accurate, transparent, and accessible • Cybersecurity Fight hacking with immutability to ledger Guarantee validity with data integrity No Single Point of Failure (decrease in IP-based DDoS attack success) • Donations Provide auditable trail for donations to prevent fraud Ensure crowdfunded campaigns receive donations and contributions are compensated • Education Digitizing, verifying academic credentials Federated repository of academic information specific to class, professor, and student • Energy Bypass public grids to allow for cheaper, peer to peer energy transfer Smart utility metering • Forecasting Combined with machine learning algorithms, blockchain can provide a decentralized forecasting tool • Government and Voting Reduce voter fraud, inefficiencies with verifiable audit trails Minimize government fraud, digitize most processes Increase accountability and compliance for government officials Identity validation, integrity of citizen registry data • Gun Safety Tracking gun ownership and possession related information Tracking criminal ID history and attempts to purchase • Human Resources Background checks: Verification of identity, employment history Payment and benefits process validation – smart contracts • Insurance Improve multi-party contracts Streamline risk contract efficiency Streamline claims adjudication Reduce disputes with transparency of shared data • IOT Ability for IoT applications to contribute transactional data to blockchains Implications across Industries (trucking/transportation, supply chain integrity) • Law Enforcement Integrity of evidence, resistance to falsification of case data Documentation of time-stamped, chronological chain of facts • Legal Smart contracts with defined rules, expiration and accessibility for relevant parties • Marketing Bypass intermediaries, providing more cost-effective advertising • Media Control of ownership rights Anti-piracy / copyright infringement Use of smart contracts for artist compensation/legal proceedings Payment processing – cryptographic, secure, and anti-3rd party (this opens up content availability internationally) • Medical / Healthcare Drug Supply Chain Integrity Patient Databases/Indexes on blockchain Claims Adjudication Medical Supply Chain Management Transparency and Automation within the patient-to-hospital or patient-to-doctor transactions Clinical trial provenance – integrity with an auditable trail of data exchange Efficiency, privacy, and ownership of patient health data • Music Streaming Prevent illegal downloading of music Provide proper compensation for purchased songs to artists • Public Transportation/Ride Sharing Streamline public transportation Provide more accurate payment for ride, gas, and wear and tear • Real Estate Transparency within agreements Verify Property Information, update and decentralize records Reduce paperwork, digitize transactional processes Record, track, transfer land titles • Travel Passenger Identification, boarding, passport, payment, and other documentation digitized and verified Loyalty programs digitization and tracking • Wills and Inheritances Smart contracts to determine validity of will and allocation of inheritances
Views: 170 GectaCoin
What is Blockchain | How does blockchain work | Blockchain in Hindi
Explained What is Blockchain technology, how it solves the Money Transfer Problem as well as Double Spending Problem. It also covers principal of Distributed Ledger Technology and Proof of Work(51% honest node). It also has one blockchain example in detail. Blockchain technology works on Distributed Ledger Technology. Blockchain formation. The main chain (black) consists of the longest series of blocks from the genesis block (green) to the current block. Orphan blocks (purple) exist outside of the main chain. Bitcoin network data A blockchain,originally block chain, is a growing list of records, called blocks, which are linked using cryptography.[1][6] Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a merkle tree root hash). By design, a blockchain is resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for inter-node communication and validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without alteration of all subsequent blocks, which requires consensus of the network majority. Although blockchain records are not unalterable, blockchains may be considered secure by design and exemplify a distributed computing system with high Byzantine fault tolerance. Decentralized consensus has therefore been claimed with a blockchain. Blockchain was invented by Satoshi Nakamoto in 2008 to serve as the public transaction ledger of the cryptocurrency bitcoin. The invention of the blockchain for bitcoin made it the first digital currency to solve the double-spending problem without the need of a trusted authority or central server. The bitcoin design has inspired other applications, and blockchains which are readable by the public are widely used by cryptocurrencies. Private blockchains have been proposed for business use. Sources such as the Computerworld called the marketing of such blockchains without a proper security model "snake oil".
Views: 30 Kavya Academy
Information Technology: Lecture 1 Part 2-2 (6/5/2014)
Information Technology: Professor Vasarhelyi Lecture #1 Part 2-2 Introduction and WebLife Please visit our website at http://raw.rutgers.edu Time Stamps: 00:00:07 Continuation of Smart Electronization 00:01:27 How Technology is Changing your Brains 00:10:47 Artificial Intelligence and the Singularity 00:15:29 Big Data 00:25:24 E-Commerce, CRM, Supply Chain 00:25:49 Competing on analytics 00:26:20 Audit Analytics 00:27:26 Audit Ecosystem 00:27:35 NSA Snooping, Security, Cyberwar, and Privacy 00:34:03 Basic Technology and the Cloud 00:43:00 Communications 01:31:01 Internet Elements 01:43:53 Definitions 01:51:13 Corporate Internet Access This video begins with the professor's continued discussion of smart electronization. He goes on to explain the rest of the lecture outline which consists of artificial intelligence, singularity, big data, e-commerce, audit analytics, and more. The professor goes on to talk about basic technology and the cloud. Following this discussion, he speaks about communications and internet elements. The professor concludes the lecture by going over definitions and a brief discussion about corporate internet access. Please subscribe to our YouTube channel and get the latest updates on the RU digital library. To receive additional updates regarding our library please subscribe to our mailing list using the following link: http://rbx.business.rutgers.edu/subscribe.html
Bitcoin - Proof of useful work
Proof of useful work - Bitcoin and Cryptocurrency Technologies Part 8 - Alternative Mining Puzzles Not everyone is happy about how Bitcoin mining works: its energy consumption and the fact that it requires specialized hardware are major sticking points. This week we'll look at how mining can be re-designed in alternative cryptocurrencies.
Views: 266 intrigano