One of the hottest topics in current crypto research is Post-Quantum Cryptography. This branch of cryptography addresses asymmetric crypto systems that are not prone to quantum computers. Virtually all asymmetric crypto systems currently in use (Diffie-Hellman, RSA, DSA, and Elliptic Curve Crypto Systems) are not Post-Quantum. They will be useless, once advanced quantum computers will be available. Quantum computer technology has made considerable progress in recent years, with major organisations, like Google, NSA, and NASA, investing in it. Post-Quantum Cryptography uses advanced mathematical concepts. Even if one knows the basics of current asymmetric cryptography (integer factorisation, discrete logarithms, …), Post-Quantum algorithms are hard to understand. The goal of this presentation is to explain Post-Quantum Cryptography in a way that is comprehensible for non-mathematicians. Five families of crypto systems (as good as all known Post-Quantum algorithms belong to these) will be introduced: Lattice-based systems: The concept of lattice-based asymmetric encryption will be explained with a two-dimensional grid (real-world implementations use 250 dimensions and more). Some lattice-based ciphers (e.g., New Hope) make use of the Learning with Error (LWE) concept. I will demonstrate LWE encryption in a way that is understandable to somebody who knows Gaussian elimination (this is taught at middle school). Other lattice-based systems (especially NTRU) use truncated polynomials, which I will also explain in a simple way. Code-based systems: McEliece and a few other asymmetric ciphers are based on error correction codes. While teaching the whole McEliece algorithm might be too complex for a 44CON presentation, it is certainly possible to explain error correction codes and the main McEliece fundamentals. Non-commutative systems: There are nice ways to explain non-commutative groups and the crypto systems based on these, using everyday-life examples. Especially, twisting a Rubik’s Cube and plaiting a braid are easy-to-understand group operations a crypto system can be built on. Multivariate systems: Multivariate crypto can be explained to somebody who knows Gaussian elimination. Hash-based signatures: If properly explained, Hash-based signatures are easier to understand than any other asymmetric crypto scheme. I will explain these systems with cartoons, drawings, photographs, a Rubik’s Cube and other items. In addition, I will give a short introduction to quantum computers and the current Post-Quantum Crypto Competition (organised by US authority NIST). For more from 44CON and tickets visit 44CON Website: https://44con.com ---=== Contact ===--- YouTube: https://youtube.com/c/44contv Website: https://44con.com Twitter: https://twitter.com/44con LinkedIn: https://www.linkedin.com/groups/44Con-3886577 Facebook: https://www.facebook.com/44CON ---=== Music Credits ===--- Island - by MBB: https://soundcloud.com/mbbofficial (https://twitter.com/mbbmusic) Grind - by Andrew Huang - YouTube Music Library
Views: 115 44CON Information Security Conference
There are 43,252,003,274,489,856,000 ways to arrange a standard 3x3 Rubik's Cube. More links & stuff in full description below ↓↓↓ See our full series of Rubik's Cube videos at: http://www.youtube.com/playlist?list=PLt5AfwLFPxWJNAdHv8TUCOmj7iKqyHZeg This video features Matt Parker, James Grime and Katie Steckles. With thanks to Drew Mokris for doing the animation: http://www.spinnerdisc.com/ With thanks to Feliks Zemdegs for use of one of his many world-record breaking videos: http://www.youtube.com/user/fazrulz1 NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile
Views: 1146188 Numberphile
Application architects need to make informed choices to use cryptography well: + Alternative key architectures have their merits and drawbacks. PKIs, in particular, should be contrasted with symmetric key architectures such as Kerberos. + Network protocol characteristics are pivotal in ensuring distributed applications meet security requirements. Key strength choices impact on security guarantees offered, as do cryptographic algorithm modes. + While strong keys and wise use of cryptographic algorithms may thwart cryptanalytic attack, applications are insecure without prudent key management. In this context, key generation and key storage require particular attention. + The selection of crypto-libraries requires awareness of inherent library qualities and failures. Application developers are advised not to implement their own. Learning objectives + decide if and when cryptography should be used. + make informed key architecture and management decisions. + use appropriate algorithms and parameters. + select an appropriate cryptographic library. + choose network protocols for distributed applications. This lecture was delivered by Bart Preneel at SecAppDev 2013 in Leuven, Belgium. Professor Bart Preneel of KU Leuven heads the COSIC (COmputer Security and Industrial Cryptography) research group. His main research area is information security with a focus on cryptographic algorithms and protocols as well as their applications to both computer and network security, and mobile communications. He teaches cryptology, network security and coding theory at the KU Leuven and was visiting professor at the Ruhr Universitaet Bochum (Germany), the T.U.Graz (Austria), the University of Bergen (Norway), and the Universiteit Gent (Belgium). In '93-'94 he was a research fellow at the University of California at Berkeley. He has taught intensive courses around the world. He undertakes industrial consulting (Mastercard International, S.W.I.F.T., Proton World International,...), and participates in the work of ISO/IEC JTC1/SC27/WG2. Professor Preneel is Vice President of the International Association for Cryptologic Research (IACR) and co-founder and chairman of LSEC vzw (Leuven Security Excellence Consortium).
Views: 2922 secappdev.org
Banks, Facebook, Twitter and Google use epic numbers - based on prime factors - to keep our Internet secrets. This is RSA public-key encryption. More links & stuff in full description below ↓↓↓ Gold Vault: https://youtu.be/CTtf5s2HFkA This video features Dr James Grime (http://singingbanana.com/). Message from James: "Thanks to Dr Chris Hughes of the University of York who showed me how to find the RSA public key from my browser, and showed me how awesome they look when you print them out." Regarding the keys used for encryption: x, y prime Encode key E shares no factors with (x-1)(y-1) Decode key is D with E*D - 1 a multiple of (x-1)(y-1) Thanks to Drew Mokris for the animation: http://www.spinnerdisc.com/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile
Views: 1051861 Numberphile
كيفية تشفير النصوص أو كلمات السر عن طريق عمل دالة ( خوارزية ) التشفير الخاصة بك في الدلفي 42.Make your own Encryption algorithm - Delphi Database course كورس إحتراف برمجة تطبيقات قواعد البيانات بالدلفي مع رؤوف رحيش
Views: 849 رؤوف رحيش - Raouf Rahiche
Modern cryptography depends on the existence of several special kinds of mathematical functions. One important kind is a one-way function. One-way functions are easy to compute but very hard for anyone to invert. Sometimes we refer to these functions as hash functions and their output as a hash. Cryptographic hash functions are a subset of hash functions that have special properties important to their use in cryptography. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 498 internet-class
MIT 6.006 Introduction to Algorithms, Fall 2011 View the complete course: http://ocw.mit.edu/6-006F11 Instructor: Victor Costan License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 18807 MIT OpenCourseWare
This lecture presents an overview of the Snowden revelations and the impact on our understanding of the security of our networks and systems. In particular, we discuss the known ways in which sophisticated attackers can bypass or undermine cryptography. We also speculate on how three-letter agencies could be breaking most encryption on the Internet. We relate this to the latest developments in cryptanalysis and discuss which cryptographic algorithms and implementations to select to stay protected. Learning objectives + Understand how sophisticated opponents agencies can undermine cryptographic protection + Understand how to maximize your chances to resist sophisticated opponents using cryptographic techniques This lecture was delivered by Bart Preneel at SecAppDev 2016, Leuven, Belgium Professor Bart Preneel of KU Leuven heads the iMinds COSIC (COmputer Security and Industrial Cryptography) research group. His main research areas are information security and privacy with a focus on cryptographic algorithms and protocols and efficient and secure implementations. He has authored more than 400 scientific publications and is inventor of five patents. He teaches cryptology, network security and discete algebra at the KU Leuven and was visiting professor at the Ruhr Universitaet Bochum (Germany), the T.U.Graz (Austria), the University of Bergen (Norway), DTU (Denmark) and the Universiteit Gent (Belgium). In '93-'94 he was a research fellow at the University of California at Berkeley. He undertakes industrial consulting for major players in the finance, telco and hardware industry and has co-designed the Belgian eID and e-voting scheme. He is active in international standaridzation . Professor Preneel has served as Director, (1997-present), Vice President (2002-2007) and President (2008-2013) of the International Association for Cryptologic Research (IACR) and is co-founder and chairman of LSEC vzw (Leuven Security Excellence Consortium). He is a fellow of the IACR, a member of the Permanent Stakeholders group of ENISA (European Network and Information Security Agency) and of the Academia Europaea. He has testified for the European and Belgian parliament. He has been invited speaker at more than 150 conferences and schools in 40 countries. In 2014 he received the RSA Award for Excellence in the Field of Mathematics.
Views: 931 secappdev.org
هذا هو الدرس التاسع في دورة شاملة في أمن نظم المعلومات. https://www.facebook.com/pages/%D8%B1%D9%8A%D8%A7%D8%B6-%D8%AE%D9%84%D9%8A%D9%81%D8%A9-Riyad-Khalifeh/686082998130550?ref=hl
Views: 7420 رياض خليفة
Professor Brailsford on why Goto is frowned upon, and yes, we didn't mention Dijkstra this time. Note - the Japanese characters for Eiichi Goto's name should read: 後藤英一 Dijkstra's Algorithm: https://youtu.be/GazC3A4OQTE https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 90873 Computerphile
How many people do you need in a group together before you've got a 50% chance of two people sharing the same birthday? If you've never seen this before, the answer is likely to surprise you. The Birthday Problem is sometimes called the Birthday Paradox, but it's not a paradox in the true sense of the word, but it is an extremely counterintuitive result. In the 2nd half of the video I will demonstrate that the result is correct by using simple probability. Once you've watched this video, next time you're in a group of people of about the right size, why not try and find out if there are any shared birthdays! Social Media: Facebook: http://facebook.com/RichardB1983 Twitter: http://twitter.com/rb357 Instagram: http://instagram.com/RichardB_1983 Google Plus: http://google.com/+RichardB1983
Views: 56806 RichardB1983
CUBE COIN| CUBE Coin Review: Cube Coin - Blockchain-Based Security Platform Website ➤ https://cubeint.io Contacts ➤ [email protected] About the Cube Coin Autonomous cars communicate with different sites which remotely monitor the internal and external state of the car providing regular updates. The different network accesses provide an opening for malicious cyber-attacks on your autonomous vehicle. This is where Cube comes in. Through the use of blockchain technologies, artificial intelligence based as well as quantum hash cryptography, Cube will ensure that the autonomous vehicle is secure from any malicious attack. Cube is likely to disrupt the car security industry by providing an enhanced security system which is based on blockchain technology, a first in the industry. How CUBE Coin Works Ever wondered how an automatic car works? Well, when the car is in operation, there are many IOTs that provide information which direct the vehicle on the next course of action. An attacker seeks access to one of the networks thereby disrupting the smooth communication between the autonomous vehicle and the traffic center. However, using the CUBE Coin will ensure that an attacker is unable to gain access of the networks. In addition, if the attacker gains access, the vehicle will recognize the foreign command and automatically be blocked. The bulk of data that a smart car has to process is nearly ten times higher than the amount that virtual currencies have to execute. So it is obvious that the legacy processes adopted by automotive technology will not work in the coming time. Now, here are some other limitations that automotive tech currently faces. Centralization issue While driving, the total amount of data received from the outside is approximately four terabyte every day. Processing such a mammoth amount of data can cause some serious issues. In simple words, centralization can easily bring down the CPU’s speed. Plus, the entire system can eventually crash should the number or cars rises. Privacy issue Since today’s automotive technology is centralized, the privacy of the drivers is also at stake. If someone manages to break into the centralized server, every piece of critical information will slip away from the ecosystem. This development will cause the loss of data and money, for sure. Safety issues By analyzing all the weaknesses of an existing automotive network, CUBE adopted blockchain technology. The team behind Cube believes that a blockchain is the key to building a sturdy security platform that can streamline and accelerate every autonomous vehicle running on the road. However, deploying a traditional blockchain has its own challenges—let us overview these challenges, now. The challenges faced by a blockchain solution With a blockchain, the primary challenge is that its instantiations suffer from low scalability and high overheads. The consensus algorithm, which the blockchain employs, involves solving very difficult cryptographic puzzles that consume a lot of computational resources. Every transaction and each block are broadcasted to the whole network resulting in a significant increase in overheads. In addition, this move raises the scalability issue just because the total broadcast packets rise quadratically along with the participating nodes. How does Cube solve these challenges? Cube solves each of the limitations found in the conventional blockchain technology by building a hybrid blockchain tech. In a hybrid blockchain, Cube uses both private and public blockchains without any hassles. If the project needs a high level of security, then a public blockchain will help. However, this format of blockchain is very slow. Likewise, if a basic level of security is needed at a fast pace, then a private blockchain is the way to go. Also, when it comes to securing this blockchain’s data, Cube uses the single-signature and multi-signature methodologies—they are really tried-and-tested methods of securing data. The way the information flows to a vehicle depends on the criticality of the information. For example, if the information is related to entertainment, then it may be accepted without any prior confirmation. Nevertheless, if the information is about the level of traffic, then it may need a single-level authentication. CUBE Coin Conclusion It is no doubt that CUBE Coin is the coin to watch. The coin is revolutionary in that it targets to serve a sector that is exponentially growing and has few, if any, competitors. The fact that you’ll use the Cube coin for daily errands makes it even more attractive. However, like with any other investment decision, it is prudent to conduct a thorough fact finding before committing your hard earned dollars to the venture.
Views: 3916 Crypto Academy
Fantasyomatic takes some time on the Whats Your Fantasy podcast to explain the new algorithm used on fantasyomatic.com in 2011. Th concept is based on a mathematical approach called "regression analysis". For more information, see the post: http://www.fantasyomatic.com/?page_id=4312
Views: 5458 fantasyomatic
Institute for Mathematics and its Applications (IMA) Public Lecture Series http://www.ima.umn.edu/public-lecture/ From Rubik to Escher to Security: Symmetry from Scratch 7:00 P.M., Thursday, September 19, 2013 2-650 Moos Tower 515 Delaware St SE East Bank, University of Minnesota, Minneapolis Brian Conrad, Stanford University Symmetry is evident in many forms from ancient architecture to classical art; however, not as obvious is the mathematical theory of symmetry behind modern applications, such as Rubik's Cube, the art of M.C. Escher, and the security of financial transactions on the Internet. These three topics are not as unrelated as they may initially seem to be. During the lecture, the mathematical ideas behind symmetry will be developed from scratch and illustrated with pictures and numerical examples.
Views: 791 IMA UMN
The RSA trapdoor permutation To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 396 intrigano
"What Is DSA Algorithm? How does DSA algorithm work? Using a public key algorithm, such as RSA, one can generate two keys that are mathematically linked: one private and one public. ... The individual who is creating the digital signature uses their own private key to encrypt signature-related data; the only way to decrypt that data is with the signer's public key. What is RSA and DSA algorithm? DSA(Digital Signature Algorithm) can only be used for signing/verification, whereas RSA can be used for encryption/decrypt as well. RSA stands for Ron Rivest, Adi Shamir and Leonard Adleman, who first publicly described it in 1978. What is DSA encryption? DSA stands for ""Digital Signature Algorithm"" - and is specifically designed to produce digital signatures, not perform encryption. ... In RSA, the private key allows decryption; in DSA, the private key allows signature creation."
Views: 429 Hadassah Hartman
Benjamin Fine (Fairfield University). Title: Password Security Using Combinatorial Group Theory Abstract. Joint with: Gilbert Baumslag and Doug Troeger. Over the past decade and a half there has been a concerted effort to apply combinatorial group theoretic methods to cryptographic protocols. In this talk we briefly explain how group theoretic techniques are applied to cryptology and then consider a method to apply group theoretic techniques to password security. Challenge response methods are increasingly used to enhance password security. In particular we present a very secure method for challenge response password verification using combinatorial group theory. This method, which relies on the group randomizer system, a subset of the MAGNUS computer algebra system, handles most of the present problems with challenge response systems. Theoretical security is based on several results in asymptotic group theory and these will be explained as well. For more information regarding the colloquium, please visit: https://sites.google.com/site/nyalg2/
Views: 109 Al Om
(Source code on request. UPDATE: See below) Made an encryption scheme that creates a square (padding random bytes if necessary) and shifts a square based on the password. Given the same password, it will perform the same shifts. Decryption uses the same algorithm but performs the actions backwards. Another version (shown second, starting at 0:53) also does character substitution. This basically adds up the values of each character of the password and each character of the data, modulus the length of the character set of course. After that it still performs shifting. It's not going to be used for anything at all ("rolling your own" is always an extremely bad idea in cryptography, I know that very well), I just enjoyed creating it. Just shifting the square around seems to give a pretty random outcome, and with character substitution you really can't tell what the original was. The algorithm also includes an extremely simple key derivation function which obfuscates the key input for a more random looking output (though the key needs not be fixed-length). It only accepts ASCII input, no accents or euro symbols or anything outside 32-127. It's not meant to be really used anyway. Again, source available on request. Note that I can't comment because then I'd need to make a Google+ profile, but I will read comments (typically within 24 hours, assuming I get an email notification) and simply edit the description to include a link. SOURCE CODE Update June 2018: Wow, I had no idea there were comments on this video at all. Everyone has been asking for years! Sorry! http://lucb1e.com/rp/php/horrible-encryption-square.php I have to warn you, it's not super easy to use. You need to have PHP installed on the command line (Ubuntu/Debian/Mint: apt install php-cli) and run it as shown in the video. To change whether it does substitution, see the third line of the file.
Views: 4647 lucb1e
A CIA analyst has cracked a cryptic code but how useful is it? A Swedish artist builds a city out of bread, and Donald Rumsfeld crawls from out of the woodwork to weigh in on Obama. Thoughts, Rants & Cold Coffee is a daily news segment by Ron Placone. http://www.ronplacone.com A Swedish artist builds a city out of bread and takes photos as it decays, accepts position as the set designer for every future Tim Burton movie CIA analyst cracked three of the four codes on the cryptic sculpture at CIA headquarters, nice to know the CIA is spending time solving its own puzzle, remember, whoever solves the office Rubik's cube gets a free sandwich Donald Rumsfeld said he can't tell if Obama has switched sides in the war on terror, which makes sense because he still hasn't figured out who the war on terror is against
Views: 2282 Ron Placone
Here's something I wrote a few weeks ago and I've been spreading around, and encouraging others to do so as well. The formatted version I put on my DeviantArt journal is linked to below, and I've provided the raw text as well; feel free to copy it and spread it around anywhere you think it'll do good--especially to politicians. The Ten Commandments of Encryption Policy by shanedk on DeviantArt http://shanedk.deviantart.com/journal/The-Ten-Commandments-of-Encryption-Policy-634133886 So many politicians, bureaucrats, and pundits are proposing weakening our crypto to allow searches by law enforcement without understanding the issue, so I thought it'd be good to have a quick reference to explain why this is a bad idea. Feel free to copy this and send to politicians, news reporters, or anyone else you think needs to know this. The Ten Commandments of Encryption Policy 1. In "Applied Cryptography" (2nd Ed., John Wiley & Sons, 1996), Bruce Schneier wrote: "There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading your files, and cryptography that will stop major governments from reading your files." Therefore, anything that allows our government to read our messages will automatically put our crypto into the "kid sister" category. 2. Anything that allows government to read your message will also allow hackers to read your message. Cryptography is just math, and math works the same for everybody. It doesn't distinguish between good people and bad, or who has a warrant and who doesn't. 3. When strong crypto is outlawed, only outlaws will have strong crypto. The encryption genie is already out of its mathematical bottle. Weakening our crypto so our governments can read it will only make us vulnerable to hacker groups and terror organizations like ISIS, who will have no hesitation about breaking the law to use strong crypto themselves. 4. "If you have nothing to hide, you have nothing to worry about" is a very dangerous mantra. Just ask anyone who's had their identity stolen. 5. When people talk about giving law enforcement authorities access to our data, remember that they're talking about the same law enforcement authorities who illegally tapped Martin Luther King Jr.’s phones. 6. Terror attacks, mass shootings, and mass hackings are all proof that we cannot rely on laws to protect us. We need to protect ourselves with math. Protecting our data is too important to be left to governments. 7. Always remember that lawmakers want solutions that are visible, that they can point to and say, "See? It works." But security solutions that ACTUALLY work are invisible. People go about their lives unaware of the attacks they were protected from. People don't notice the days their house DOESN'T get burgled. 8. Don't be caught up in considering how much security you "need." You won't know how much that is until after the worst happens and it's too late. We need to be able to give ourselves every last bit of security that we can. 9. Before you bring up the founders or the Constitution, remember that they themselves often communicated using ciphers. Thomas Jefferson even invented a wheel cipher for this purpose. 10. We need to consider the consequences of constant observation. Every bit of human progress began as an idea that most people opposed. The last thing we want to do is make people afraid to express those ideas.
Views: 790 Shane Killian
Hope u enjoyed. Now you may be able to understand the other cubing videos now that you know the algorithm letters. If I can memorize them, then you can too! 2x2 Tutorial: https://youtu.be/CQxedgIuK8Y
Views: 169 CubeTube
Cryptography Definitions and security (Public Key Encryption from trapdoor permutations) To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 155 intrigano
YT Wont Show You These Videos So I have Them HERE - https://studionewsnetwork.com Stand Up To The Purge Support The Channel And Website Here - https://studionewsnetwork.com/product-category/donations/ · Appreciate What I am Doing? Help Keep Me On The Road By Donating Here - . Appreciate What I am Doing? Help Keep Me On The Road By Donating Here - https://paypal.me/StudioNewsNetwork
Views: 1177 SNN
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1261 Udacity
Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 1198463 Khan Academy Computing
In this video, Prof. Nigel Smart answers interesting questions whether Multiparty Computation (MPC) can be applied to online dating, how games are used in cryptography incl. system breaking, and if we ever solved the P vs. NP problem, could we replace public key cryptography? Check out the video to find out! In the 'Ask the Professor' video series, Professor Nigel Smart, a world-renowned expert in applied cryptography, and professor at the COSIC group at the KU Leuven was Vice President of the International Association for Cryptologic Research and a fellow of the IACR. Prof. Smart answers the internet's' most interesting questions about cryptography. Based on questions from popular blogs, forums, and social media—this series is relevant for both beginners and advanced crypto enthusiasts alike. Based on questions from popular blogs, forums, and social media—this series is relevant for both beginners and advanced crypto enthusiasts alike. Brought to you by Dyadic Security (https://www.dyadicsec.com) world leader in software defined cryptography, has developed a unique technology that combines both the high usability of software with the strong security guarantees that were previously only available through dedicated hardware. This technology is based on decades of research by two of the world’s leading cryptographers who founded Dyadic Security in 2014 together with a team of applied crypto experts.
Views: 212 Unbound Tech
A magic square has every row, column, and diagonal sum to the same number. How many magic squares are there using the numbers 1 to 9? This video shows you all the possibilities and proves there are no others, leading to the surprising result the 3x3 magic square is essentially unique, up to symmetries of a square. Blog post http://wp.me/p6aMk-4nC Relevant Math Stack Exchange http://math.stackexchange.com/questions/636633/how-to-prove-that-a-3-times-3-magic-square-must-have-5-in-its-middle-cell If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social media. I update each site when I have a new video or blog post, so you can follow me on whichever method is most convenient for you. My Blog: http://mindyourdecisions.com/blog/ Twitter: http://twitter.com/preshtalwalkar Facebook: https://www.facebook.com/pages/Mind-Your-Decisions/168446714965 Google+: https://plus.google.com/108336608566588374147/posts Pinterest: https://www.pinterest.com/preshtalwalkar/ Tumblr: http://preshtalwalkar.tumblr.com/ Instagram: https://instagram.com/preshtalwalkar/ Patreon: http://www.patreon.com/mindyourdecisions Newsletter (sent about 2 times a year): http://eepurl.com/KvS0r My Books "The Joy of Game Theory" shows how you can use math to out-think your competition. (rated 4/5 stars on 23 reviews) https://www.amazon.com/gp/product/1500497444 "The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 5/5 stars on 1 review) https://www.amazon.com/gp/product/1523231467/ "Math Puzzles Volume 1" features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.5/5 stars on 11 reviews. https://www.amazon.com/gp/product/1517421624/ "Math Puzzles Volume 2" is a sequel book with more great problems. https://www.amazon.com/gp/product/1517531624/ "Math Puzzles Volume 3" is the third in the series. https://www.amazon.com/gp/product/1517596351/ "40 Paradoxes in Logic, Probability, and Game Theory" contains thought-provoking and counter-intuitive results. (rated 4.9/5 stars on 7 reviews) https://www.amazon.com/gp/product/1517319307/ "The Best Mental Math Tricks" teaches how you can look like a math genius by solving problems in your head (rated 4.7/5 stars on 3 reviews) https://www.amazon.com/gp/product/150779651X/ "Multiply Numbers By Drawing Lines" This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 1 review) https://www.amazon.com/gp/product/1500866148/
Views: 495757 MindYourDecisions
Please give it a thumbs up if you liked the video! Thanks Video project for CIS4930 Special Topics and Algorithms. This video covers the basics of understanding the runtime for algorithms. The question I had when learning this was, "Where is the number coming from that is being compared to the 'n'?... Once I figured out that the number was basically a count of the number of times a for loop actually looped, well, life became much easier for me in regards to understanding runtime. I hope this video helps you have a better understanding of the basics of algorithm runtime. Please feel free to leave a comment for any other computer science related concepts for which you would like to see a video.
Views: 13111 D. Roy
ICON (ICX) review! ICON is a cryptocurrency & platform attempting to hyperconnect the blockchain through the ICON Republic, ICON DEX, nodes, & Nexus using the Loop Fault Tolerance consensus algorithm. ICON is a platform aimed at building one of the world’s largest decentralized networks by creating an ecosystem in which independent blockchains can connect and interact with one another through smart contracts. ICON’s vision is to “Hyperconnect the World” with its loopchain technology. Community within ICON is a protocol or an individual blockchain that has its own governing system. The infrastructure of each community is made up of Community Nodes (or C-Nodes). C-Reps, short for Community Representatives, act like elected officials for their communities, and are a governance component within the ICON Republic. Citizen Nodes are also components of the ICON Republic. Through dapps created on the loopchain, anyone can participate as a Citizen Node. Portals are nodes that allow C-Reps to connect to ICON’s Nexus, which is a loop-based blockchain. Portals connect through the Blockchain Transmission Protocol, or BTP, which ensures that the connected independent blockchains can easily transact with one another. BTP ensures independent governance and only makes mutual connections when needed. Even though each blockchain is free to have its own design and consensus algorithm, consensus in Nexus and the ICON Republic is based on Loop Fault Tolerance, or LFT. ICX (ICON’s native token), is embedded in Nexus and will be used by interconnected blockchains to transfer values between them. Nexus also has reserve channels that allow anyone to issue bonds and purchase ICX issued from Nexus. Notary Channels are what process BTP. Nexus’ Public Channel will be open to anyone who wants to participate in ICX transactions as well to those who want to use or create different dapps. Citizen Nodes will be able to download and use these dapps from ICON’s DAPP store. Nodes on the Public Channel will be divided into Light-Client based nodes—which can register and confirm transactions—and Full Nodes, which are tasked with validating transactions. ICON uses its own Loop Fault Tolerance consensus algorithm, which is based on the Byzantine Fault Tolerance (BFT) consensus algorithm. LFT on the other hand (or Loop Fault Tolerance) ensures finality, thus removing the possibility of network forks. Validation nodes transfer the transactions. The leader node will then create a block from the collected transactions, sign it, and transfer it to all other verification nodes. After each of the verification nodes receives the block, they must confirm the creation of the block, check if the block level and the prior hash are correct, and validate the block data. If all three steps are correct, “vote data” is created and transmitted to every node. SCORE (short for Smart Contract on Reliable Environment) indicates Smart Contracts provided by a loopchain. SCORE doesn’t run on a separate Virtual Machine. Instead, it runs directly in real runtime based on a container separated from the blockchain process. This means that even if there’s an issue with Smart Contracts, the basic blockchain can still operate within set parameters. SCORE also has a repository feature for versioning, which basically means that it doesn’t require data migration with each update, thus making the process quicker & easier. ICON boasts its own decentralized exchange, or DEX. DEX enables automated, anonymous, and trustless transactions. Through DEX, ICON Communities will have another gateway of connecting to the ICON Republic, in addition to the C-Rep portals. DEX will set currency reserves for each blockchain community, allowing for the real-time exchange of value within the ICON Republic, using its coin ICX as the intermediary currency. ICON’s reserve means that community members will be able to trade currencies without using public exchanges. Blockchains connected to the ICON Republic will be able to engage in trades and transactions, and exchange rates will be set by DEX using an Artificial Intelligence Analysis Model. The AI Analysis Model is one of the key features within its DEX, and it can be established based on accumulated information, like transaction frequency, total call volume, or the price involved in different cryptocurrency transactions. AI also determines the ICON Incentives Scoring System (or IISS for short). Each network node's contribution will be rewarded with an amount of ICX calculated through IISS based on factors like the node’s frozen ICX, C-Rep status, ICX exchange volume, ICX exchange value of the whole community, or ICX volume traded through their DEX. Disclaimer: This is not financial advice. I absolve myself of all responsibility (directly or indirectly) for any damage, loss caused, alleged to be caused by, or in connection with the use of or reliance on any content, goods or services mentioned in this article. As usual, do your own research.
Views: 849 Crypto Coin Consultants
تم رفع جميع ملفات المشروع على الرابط التالي : http://muhammedessa.com/cms-with-php-and-mysql/
Views: 631 Muhammed Essa
Thomas Vidick Massachusetts Institute of Technology April 1, 2013 A trusted source of independent and uniform random bits is a basic resource in many computational tasks, such as cryptography, game theoretic protocols, algorithms and physical simulations. Implementing such a source presents an immediate challenge: how can one certify whether one has succeeded? i.e. suppose someone were to claim that a particular device outputs a uniformly random n-bit string; is there a feasible test to verify that claim? This seems like an impossible task: since the device must output each n-bit string with equal probability there is no basis on which to reject any particular output in favor of any other. Ideas originating in the study of nonlocality in quantum mechanics suggest a remarkable solution to this conundrum: a random number generator whose output is certifiably random in the sense that if the output passes a simple statistical test, and a no-signaling condition is met between the two boxes in the randomness generating device, then even a quantum skeptic (viz Einstein's famous quote ``God does not play dice with the Universe''), would be convinced that the output is truly random. Partially dropping the skeptic's hat, I will show how the same ideas can be used to obtain a protocol for key distribution whose security, although it relies on the correctness of quantum mechanics, does not require any assumption on the nature of the quantum mechanical devices used in the protocol. In particular, security of the generated key is guaranteed even if the devices are faulty or even have been handed over to the users by a malicious, computationally unbounded, adversary. These results suggest a powerful paradigm of "device independence" enabling previously impossible tasks under minimal assumptions. Based on joint work with Umesh Vazirani. For more videos, visit http://video.ias.edu
Views: 120 Institute for Advanced Study
One of the most common questions from the Bloom Filter video was "how do I generate all of those hashes?". So.. here's some hints. The details from this presentation were largely inspired and/or stolen from HorrendousRex of reddit - with permission - you can learn a lot more from his super-awesome comment here: http://www.reddit.com/r/programming/comments/213vmk/cube_drone_bloom_filters/cg9ven0
Views: 4301 Curtis
Some quick advice to everyone starting their final project at design school. Pick a project you love, not what you think will get you a good grade! I'd love to see what projects you're working on, let me know the topics in the comments below. Good luck everyone!
Views: 1376 Sam_Does_Design
Views: 4081 Event Handler
This video is part of the Infosec Video Collection at SecurityTube.net: http://www.securitytube.net ConFidence 2010 - Web browser PKI/SSL security policy weaknesses and a potential solution The SSL PKI as currently implemented in web browsers has the property that any one of N trusted CA organizations can certify any TLS endpoint. The past year saw at least three major published circumstances in which CA practices, or their interactions with other systems, would have left browsers vulnerable to practical man-in-the-middle attacks due to the weakness of just 1 of the N CAs. We propose to address the browser PKI problem by modifying the TLS certificate verification algorithm to use more sources of information about a certificate.s trustworthiness. Doing this will greatly improve the browser.s trust user interface by simultaneously reducing the number of false-positives (confusing warnings about certificates that are actually correct) and false-negatives (failures to warn the user when a man-in-the-middle attack occurs).
Views: 306 SecurityTubeCons
Siris king gives a short breakdown of how algorithms control nature and your life. Understanding them helps you understand your place in nature.
Views: 1440 SirisKing