Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 497907 itfreetraining
Visit https://bugcrowd.com/jackktutorials to get started in your security research career! Remember to Like, Comment and Subscribe if you enjoyed the video! Also share if you know someone who would also like this video! Please disable Adblock to help me and other YouTubers out! Want to ask me a question? Post it on my forum thread here: http://bit.ly/AskJackkTutorials - Every Saturday I do Ask Me! In this episode of Explained! we take a look at HTTP, HTTPS & SSL/TLS and learn how the World Wide Web works ▂▃▅▆▇█ Resources used in this video █▇▆▅▃▂ HTTP - https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol SSL - http://info.ssl.com/article.aspx?id=10241 ▂▃▅▆▇█ Contact Details █▇▆▅▃▂ Email (Jackk): [email protected] Website: http://www.jackktutorials.com Forums: http://www.jackktutorials.com/forums ▂▃▅▆▇█Music used in this video █▇▆▅▃ Intro - Mr Robot Opening Theme
Views: 156386 JackkTutorials
What is NONREPUDIATION? What does NONREPUDIATION mean? NONREPUDIATION meaning - NONREPUDIATION pronunciation - NONREPUDIATION definition - NONREPUDIATION explanation - How to pronounce NONREPUDIATION? 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 Non-repudiation refers to a state of affairs where the author of a statement will not be able to successfully challenge the authorship of the statement or validity of an associated contract. The term is often seen in a legal setting wherein the authenticity of a signature is being challenged. In such an instance, the authenticity is being "repudiated". In a general sense non-repudiation involves associating actions or changes to a unique individual. For a secure area, for example, it may be desirable to implement a key card access system. Non-repudiation would be violated if it were not also a strictly enforced policy to prohibit sharing of the key cards and to immediately report lost or stolen cards. Otherwise determining who performed the action of opening the door cannot be trivially determined. Similarly, for computer accounts, the individual owner of the account must not allow others to use that account, especially, for instance, by giving away their account's password, and a policy should be implemented to enforce this. This prevents the owner of the account from denying actions performed by the account. Regarding digital security, the cryptological meaning and application of non-repudiation shifts to mean: A service that provides proof of the integrity and origin of data. An authentication that can be asserted to be genuine with high assurance. Proof of data integrity is typically the easiest of these requirements to accomplish. A data hash, such as SHA2, is usually sufficient to establish that the likelihood of data being undetectably changed is extremely low. Even with this safeguard, it is still possible to tamper with data in transit, either through a man-in-the-middle attack or phishing. Due to this flaw, data integrity is best asserted when the recipient already possesses the necessary verification information. The most common method of asserting the digital origin of data is through digital certificates, a form of public key infrastructure to which digital signatures belong. Note that the public key scheme is not used for encryption in this form; i.e. the goal is not to achieve confidentiality, since a message signed with a private key can be read by anyone using the public key. Verifying the digital origin means that the certified/signed data can be, with reasonable certainty, trusted to be from somebody who possesses the private key corresponding to the signing certificate. If the key is not properly safeguarded by the original owner, digital forgery can become a major concern. The ways in which a party may attempt to repudiate a signature present a challenge to the trustworthiness of the signatures themselves. The standard approach to mitigating these risks is to involve a trusted third party. The two most common TTPs are forensic analysts and notaries. A forensic analyst specializing in handwriting can look at a signature, compare it to a known valid signature, and make a reasonable assessment of the legitimacy of the first signature. A notary provides a witness whose job is to verify the identity of an individual by checking other credentials and affixing their certification that the party signing is who they claim to be. Further, a notary provides the extra benefit of maintaining independent logs of their transactions, complete with the type of credential checked and another signature that can independently be verified by the preceding forensic analyst. For this double security, notaries are the preferred form of verification. On the digital side, the only TTP is the repository for public key certificates. This provides the recipient with the ability to verify the origin of an item even if no direct exchange of the public information has ever been made. The digital signature, however, is forensically identical in both legitimate and forged uses - if someone possesses the private key they can create a "real" signature. The protection of the private key is the idea behind the United States Department of Defense's Common Access Card (CAC), which never allows the key to leave the card and therefore necessitates the possession of the card in addition to the personal identification number (PIN) code necessary to unlock the card for permission to use it for encryption and digital signatures.
Views: 5377 The Audiopedia
If you find our videos helpful you can support us by buying something from amazon. https://www.amazon.com/?tag=wiki-audio-20 International Data Encryption Algorithm In cryptography, the International Data Encryption Algorithm (IDEA), originally called Improved Proposed Encryption Standard (IPES), is a symmetric-key block cipher designed by James Massey of ETH Zurich and Xuejia Lai and was first described in 1991.The algorithm was intended as a replacement for the Data Encryption Standard (DES). =======Image-Copyright-Info======= Image is in public domain Author-Info: Original uploader was Surachit at en.wikipedia Image Source: https://en.wikipedia.org/wiki/File:International_Data_Encryption_Algorithm_InfoBox_Diagram.svg =======Image-Copyright-Info======== -Video is targeted to blind users Attribution: Article text available under CC-BY-SA image source in video https://www.youtube.com/watch?v=WkXCqvHb6DY
Views: 13032 WikiAudio
What is TRANSPORT LAYER SECURITY? What does TRANSPORT LAYER SECURITY mean? TRANSPORT LAYER SECURITY meaning - TRANSPORT LAYER SECURITY definition - TRANSPORT LAYER SECURITY 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 Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), both frequently referred to as "SSL", are cryptographic protocols that provide communications security over a computer network. Several versions of the protocols find widespread use in applications such as web browsing, email, Internet faxing, instant messaging, and voice-over-IP (VoIP). Websites use TLS to secure all communications between their servers and web browsers. The Transport Layer Security protocol aims primarily to provide privacy and data integrity between two communicating computer applications.:3 When secured by TLS, connections between a client (e.g., a web browser) and a server (e.g., wikipedia.org) have one or more of the following properties: The connection is private (or secure) because symmetric cryptography is used to encrypt the data transmitted. The keys for this symmetric encryption are generated uniquely for each connection and are based on a shared secret negotiated at the start of the session (see TLS handshake protocol). The server and client negotiate the details of which encryption algorithm and cryptographic keys to use before the first byte of data is transmitted (see Algorithm below). The negotiation of a shared secret is both secure (the negotiated secret is unavailable to eavesdroppers and cannot be obtained, even by an attacker who places themselves in the middle of the connection) and reliable (no attacker can modify the communications during the negotiation without being detected). The identity of the communicating parties can be authenticated using public-key cryptography. This authentication can be made optional, but is generally required for at least one of the parties (typically the server). The connection ensures integrity because each message transmitted includes a message integrity check using a message authentication code to prevent undetected loss or alteration of the data during transmission.:3 In addition to the properties above, careful configuration of TLS can provide additional privacy-related properties such as forward secrecy, ensuring that any future disclosure of encryption keys cannot be used to decrypt any TLS communications recorded in the past. TLS supports many different methods for exchanging keys, encrypting data, and authenticating message integrity (see Algorithm below). As a result, secure configuration of TLS involves many configurable parameters, and not all choices provide all of the privacy-related properties described in the list above (see authentication and key exchange table, cipher security table, and data integrity table). Attempts have been made to subvert aspects of the communications security that TLS seeks to provide and the protocol has been revised several times to address these security threats (see Security). Developers of web browsers have also revised their products to defend against potential security weaknesses after these were discovered (see TLS/SSL support history of web browsers.) The TLS protocol comprises two layers: the TLS record protocol and the TLS handshake protocol. TLS is a proposed Internet Engineering Task Force (IETF) standard, first defined in 1999 and updated in RFC 5246 (August 2008) and RFC 6176 (March 2011). It builds on the earlier SSL specifications (1994, 1995, 1996) developed by Netscape Communications for adding the HTTPS protocol to their Navigator web browser.
Views: 4264 The Audiopedia
What is CRYPTOSYSTEM? What does CRYPTOSYSTEM mean? CRYPTOSYSTEM meaning -CRYPTOSYSTEM pronunciation - CRYPTOSYSTEM definition - CRYPTOSYSTEM explanation - How to pronounce CRYPTOSYSTEM? 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 cryptosystem is a suite of cryptographic algorithms needed to implement a particular security service, most commonly for achieving confidentiality (encryption). Typically, a cryptosystem consists of three algorithms: one for key generation, one for encryption, and one for decryption. The term cipher (sometimes cypher) is often used to refer to a pair of algorithms, one for encryption and one for decryption. Therefore, the term cryptosystem is most often used when the key generation algorithm is important. For this reason, the term cryptosystem is commonly used to refer to public key techniques; however both "cipher" and "cryptosystem" are used for symmetric key techniques.
Views: 1956 The Audiopedia
What is CHAOTIC CRYPTOLOGY? What does CHAOTIC CRYPTOLOGY mean? CHAOTIC CRYPTOLOGY meaning - CHAOTIC CRYPTOLOGY definition - CHAOTIC CRYPTOLOGY 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 Chaotic cryptography is the application of the mathematical chaos theory to the practice of the cryptography, the study or techniques used to privately and securely transmit information with the presence of a third-party or adversary. The use of chaos or randomness in cryptography has long been sought after by entities wanting a new way to encrypt messages. However, because of the lack of thorough, provable security properties and low acceptable performance, chaotic cryptography has encountered setbacks. In order to use chaos theory efficiently in cryptography, the chaotic maps should be implemented such that the entropy generated by the map can produce required Confusion and diffusion. Properties in chaotic systems and cryptographic primitives share unique characteristics that allow for the chaotic systems to be applied to cryptography. If chaotic parameters, as well as cryptographic keys, can be mapped symmetrically or mapped to produce acceptable and functional outputs, it will make it next to impossible for an adversary to find the outputs without any knowledge of the initial values. Since chaotic maps in a real life scenario require a set of numbers that are limited, they may, in fact, have no real purpose in a cryptosystem if the chaotic behavior can be predicted. One of the most important issues for any cryptographic primitive is the security of the system. However, in numerous cases, chaos-based cryptography algorithms are proved unsecure. The main issue in many of the cryptanalyzed algorithms is the inadequacy of the chaotic maps implemented in the system. The concept of chaos cryptography or in the other words chaos-based cryptography can be divided into two major groups: the asymmetric and symmetric chaos-based cryptography. The majority of the symmetric chaos-based algorithms are based on the application of discrete chaotic maps in their process. Bourbakis and Alexopoulos in 1991 proposed supposedly the earliest fully intended digital image encryption scheme which was based on SCAN language. Later on, with the emergence of chaos-based cryptography hundreds of new image encryption algorithms, all with the aim of improving the security of digital images were proposed. However, there were three main aspects of the design of an image encryption that was usually modified in different algorithms (chaotic map, application of the map and structure of algorithm). The initial and perhaps most crucial point was the chaotic map applied in the design of the algorithms. The speed of the cryptosystem is always an important parameter in the evaluation of the efficiency of a cryptography algorithm, therefore, the designers were initially interested in using simple chaotic maps such as tent map, and the logistic map. However, in 2006 and 2007, the new image encryption algorithms based on more sophisticated chaotic maps proved that application of chaotic map with higher dimension could improve the quality and security of the cryptosystems. The unpredictable behavior of the chaotic maps can be used in the generation of random numbers. Some of the earliest chaos-based random number generators try to directly generate random numbers form the logistic map.
Views: 2484 The Audiopedia
RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 583589 Art of the Problem
What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean? PUBLIC-KEY CRYPTOGRAPHY meaning - PUBLIC-KEY CRYPTOGRAPHY definition - PUBLIC-KEY CRYPTOGRAPHY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys that may be disseminated widely paired with private keys which are known only to the owner. There are two functions that can be achieved: using a public key to authenticate that a message originated with a holder of the paired private key; or encrypting a message with a public key to ensure that only the holder of the paired private key can decrypt it. In a public-key encryption system, any person can encrypt a message using the public key of the receiver, but such a message can be decrypted only with the receiver's private key. For this to work it must be computationally easy for a user to generate a public and private key-pair to be used for encryption and decryption. The strength of a public-key cryptography system relies on the degree of difficulty (computational impracticality) for a properly generated private key to be determined from its corresponding public key. Security then depends only on keeping the private key private, and the public key may be published without compromising security. Public-key cryptography systems often rely on cryptographic algorithms based on mathematical problems that currently admit no efficient solution—particularly those inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Public key algorithms, unlike symmetric key algorithms, do not require a secure channel for the initial exchange of one (or more) secret keys between the parties. Because of the computational complexity of asymmetric encryption, it is usually used only for small blocks of data, typically the transfer of a symmetric encryption key (e.g. a session key). This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster. Message authentication involves hashing the message to produce a "digest," and encrypting the digest with the private key to produce a digital signature. Thereafter anyone can verify this signature by (1) computing the hash of the message, (2) decrypting the signature with the signer's public key, and (3) comparing the computed digest with the decrypted digest. Equality between the digests confirms the message is unmodified since it was signed, and that the signer, and no one else, intentionally performed the signature operation — presuming the signer's private key has remained secret. The security of such procedure depends on a hash algorithm of such quality that it is computationally impossible to alter or find a substitute message that produces the same digest - but studies have shown that even with the MD5 and SHA-1 algorithms, producing an altered or substitute message is not impossible. The current hashing standard for encryption is SHA-2. The message itself can also be used in place of the digest. Public-key algorithms are fundamental security ingredients in cryptosystems, applications and protocols. They underpin various Internet standards, such as Transport Layer Security (TLS), S/MIME, PGP, and GPG. Some public key algorithms provide key distribution and secrecy (e.g., Diffie–Hellman key exchange), some provide digital signatures (e.g., Digital Signature Algorithm), and some provide both (e.g., RSA). Public-key cryptography finds application in, among others, the information technology security discipline, information security. Information security (IS) is concerned with all aspects of protecting electronic information assets against security threats. Public-key cryptography is used as a method of assuring the confidentiality, authenticity and non-repudiability of electronic communications and data storage.
Views: 850 The Audiopedia
Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Home page: https://www.3blue1brown.com/ Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives the desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 1059769 3Blue1Brown
What is KEY STRETCHING? What does KEY STRETCHING mean? KEY STRETCHING meaning - KEY STRETCHING definition - KEY STRETCHING 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, key stretching techniques are used to make a possibly weak key, typically a password or passphrase, more secure against a brute force attack by increasing the time it takes to test each possible key. Passwords or passphrases created by humans are often short or predictable enough to allow password cracking. Key stretching makes such attacks more difficult. Key stretching techniques generally work as follows. The initial key is fed into an algorithm that outputs an enhanced key. The enhanced key should be of sufficient size to make it infeasible to break by brute force (e.g. at least 128 bits). The overall algorithm used should be secure in the sense that there should be no known way of taking a shortcut that would make it possible to calculate the enhanced key with less processor work than by using the key stretching algorithm itself. The key stretching process leaves the attacker with two options: either try every possible combination of the enhanced key (infeasible if the enhanced key is long enough), or else try likely combinations of the initial key. In the latter approach, if the initial key is a password or a passphrase, then the attacker would first try every word in a dictionary or common password list and then try all character combinations for longer passwords. Key stretching does not prevent this approach, but the attacker has to spend much more time on each attempt. If the attacker uses the same class of hardware as the user, each guess will take the same amount of time to process as it took the user (for example, one second). Even if the attacker has much greater computing resources than the user, the key stretching will still slow the attacker down, since the user's computer only has to compute the stretching function once upon the user entering their password, whereas the attacker must compute it for every guess in the attack. There are several ways to perform key stretching. A cryptographic hash function or a block cipher may be repeatedly applied in a loop. In applications where the key is used for a cipher, the key schedule in the cipher may be modified so that it takes a specific length of time to perform. A related technique, salting, protects against time-memory tradeoff attacks and is often used in conjunction with key stretching.
Views: 304 The Audiopedia
Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with "frequency analysis" Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous 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 is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. 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: 601338 Khan Academy
The Birthday Paradox says that only 23 people are needed for there to be a 50% chance a birthday is shared. Let's learn how! Last week's video https://youtu.be/CAif0urwsz4 Extra video on Everything Else https://youtu.be/o0nAQfJwE0g ~~~Sources and Music~~~ Wikipedia Page - https://en.wikipedia.org/wiki/Birthday_problem Scientific American - https://www.scientificamerican.com/article/bring-science-home-probability-birthday-paradox/# Music - Kawai Kitsune, Kevin MacLeod (incompetech.com) [Licensed under Creative Commons, Attribution 3.0]
Views: 2147 Conjecture
✔ Free Crypto-Coins: https://crypto-airdrops.de ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ . ✔ Free Crypto-Coins: https://crypto-airdrops.de ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ lll➤ Free Video-Chat: http://18cam.net ) More about Hash Functions Requirements and Security in this new IT Lecture. That´s what you will learn in this lesson. Also have a look at the other parts of the course, and thanks for watching. A hash function is any function that maps data of arbitrary length to data of a fixed length. The values returned by a hash function are called hash values, hash codes, hash sums, checksums or simply hashes. Recent development of internet payment networks also uses a form of 'hashing' for checksums, and has brought additional attention to the term. http://en.wikipedia.org/wiki/Hash_Functions This video was made by another YouTube user and made available for the use under the Creative Commons licence "CC-BY". His channel can be found here: https://www.youtube.com/user/StevesLectures
Views: 181 Lernvideos und Vorträge
How to hide any file/data in an image-Steganography Explained - Sending Secret Messages in Images Command : copy /b imagefile.jpg+documentfile.zip WIN RAR : http://www.rarlab.com/download.htm How to hide document in image-Steganography Steganography by wikipedia Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos (στεγανός), meaning "covered, concealed, or protected", and graphein (γράφειν) meaning "writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are forms of security through obscurity, whereas key-dependent steganographic schemes adhere to Kerckhoffs's principle. The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages—no matter how unbreakable—arouse interest, and may in themselves be incriminating in countries where encryption is illegal. Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message. Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it. #steganography #imagesteganography #cryptography
Views: 17963 Techie SDS
What is CRYPTOGRAPHIC SPLITTING? What does CRYPTOGRAPHIC SPLITTING mean? CRYPTOGRAPHIC SPLITTING definition - CRYPTOGRAPHIC SPLITTING 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 Cryptographic splitting, also known as cryptographic bit splitting or cryptographic data splitting, is a technique for securing data over a computer network. The technique involves encrypting data, splitting the encrypted data into smaller data units, distributing those smaller units to different storage locations, and then further encrypting the data at its new location. With this process, the data is protected from security breaches, because even if an intruder is able to retrieve and decrypt one data unit, the information would be useless unless it can be combined with decrypted data units from the other locations. The technology was filed for patent consideration in June 2003, and the patent was granted in June 2008. Cryptographic splitting utilizes a combination of different algorithms to provide the data protection. A block of data is first encrypted using the AES-256 government encryption standard. The encrypted bits are then split into different shares and then each share is hashed using the National Security Agency's SHA-256 algorithm. One application of cryptographic splitting is to provide security for cloud computing. The encrypted data subsets can be stored on different clouds, with the information required to restore the data being held on a private cloud for additional security. Security vendor Security First Corp uses this technology for its Secure Parser Extended (SPx) product line. In 2009, technology services company Unisys gave a presentation about using cryptographic splitting with storage area networks. By splitting the data into different parts of the storage area network, this technique provided data redundancy in addition to security. Computer giant IBM has written about using the technology as part of its Cloud Data Encryption Services (ICDES). The technology has also been written about in the context of more effectively using sensitive corporate information, by entrusting different individuals within a company (trustees) with different parts of the information.
Views: 249 The Audiopedia
In this video we will discuss about encryption and decryption. How these things works and why we need these. Watch the full video to know more about this topic. Like the video and please share with your friends. Subscribe to my channel for more video like this and to support my effort. Catch me on Social Networking Websites Like my Facebook Page: https://www.facebook.com/technicalsagarindia Twitter: https://twitter.com/iamasagar
Views: 128347 Technical Sagar
What is STEGANOGRAPHY? What does STEGANOGRAPHY mean? STEGANOGRAPHY meaning - STEGANOGRAPHY pronunciation - STEGANOGRAPHY definition - STEGANOGRAPHY explanation - How to pronounce STEGANOGRAPHY? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos, meaning "covered, concealed, or protected", and graphein, meaning "writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are forms of security through obscurity, whereas key-dependent steganographic schemes adhere to Kerckhoffs's principle. The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages—no matter how unbreakable—arouse interest, and may in themselves be incriminating in countries where encryption is illegal. Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message. Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it. Discussions of steganography generally use terminology analogous to (and consistent with) conventional radio and communications technology. However, some terms show up in software specifically, and are easily confused. These are most relevant to digital steganographic systems. The payload is the data covertly communicated. The carrier is the signal, stream, or data file that hides the payload—which differs from the channel (which typically means the type of input, such as a JPEG image). The resulting signal, stream, or data file with the encoded payload is sometimes called the package, stego file, or covert message. The percentage of bytes, samples, or other signal elements modified to encode the payload is called the encoding density, and is typically expressed as a number between 0 and 1. In a set of files, those files considered likely to contain a payload are suspects. A suspect identified through some type of statistical analysis might be referred to as a candidate.
Views: 5756 The Audiopedia
totally clickbait. but also not clickbait. I don't know where to start hacking, there is no guide to learn this stuff. But I hope you still have a plan now! How to learn hacking - https://www.youtube.com/watch?v=iKXd9zW1OuI The ultimate guide, everything you need to know - https://google.com Stuff that looks cool: crypto challenges - https://cryptopals.com/ wargames - https://overthewire.org other exploit challenges - http://pwnable.kr/ basics of exploitation (+ my playlists) - https://exploit-exercises.com/protostar/ math puzzles with programming - https://projecteuler.net break ethereum smart contracts - https://ethernaut.zeppelin.solutions/ Try something new: create an android app - https://developer.android.com/training/basics/firstapp/index.html create a website with python - http://flask.pocoo.org/ do some nice animations - https://processing.org/tutorials/ make some LEDs blink - https://www.arduino.cc/en/Guide/HomePage Other Channels: GynvaelEN - https://www.youtube.com/channel/UCCkVMojdBWS-JtH7TliWkVg MurmusCTF - https://www.youtube.com/channel/UCUB9vOGEUpw7IKJRoR4PK-A MalwareAnalysisForHedgehogs - https://www.youtube.com/channel/UCVFXrUwuWxNlm6UNZtBLJ-A hasherezade - https://www.youtube.com/channel/UCNWVswPNgn5kutPNa5sprkg IppSec - https://www.youtube.com/channel/UCa6eh7gCkpPo5XXUDfygQQA John Hammond - https://www.youtube.com/user/RootOfTheNull -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm.
Views: 716441 LiveOverflow
What is MESSAGE AUTHENTICATION? What does MESSAGE AUTHENTICATION mean? MESSAGE AUTHENTICATION meaning - MESSAGE AUTHENTICATION definition - MESSAGE AUTHENTICATION 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 information security, message authentication or data origin authentication is a property that a message has not been modified while in transit (data integrity) and that the receiving party can verify the source of the message. Message authentication does not necessarily include the property of non-repudiation. Message authentication is typically achieved by using message authentication codes (MACs), authenticated encryption (AE) or digital signatures. Some cryptographers distinguish between "message authentication without secrecy" systems -- which allow the intended receiver to verify the source of the message, but don't bother hiding the plaintext contents of the message -- from authenticated encryption systems. A few cryptographers have researched subliminal channel systems that send messages that appear to use a "message authentication without secrecy" system, but in fact also transmit a secret message.
Views: 794 The Audiopedia
What is FINANCIAL CRYPTOGRAPHY? What does FINANCIAL CRYPTOGRAPHY mean? FINANCIAL CRYPTOGRAPHY meaning - FINANCIAL CRYPTOGRAPHY definition - FINANCIAL CRYPTOGRAPHY 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 Financial cryptography (FC) is the use of cryptography in applications in which financial loss could result from subversion of the message system. Financial cryptography is distinguished from traditional cryptography in that for most of recorded history, cryptography has been used almost entirely for military and diplomatic purposes. Financial cryptography includes the mechanisms and algorithms necessary for the protection of financial transfers, in addition to the creation of new forms of money. Proof of work and various auction protocols fall under the umbrella of Financial Cryptography. Hashcash is being used to limit spam. Financial cryptography has been seen to have a very broad scope of application. Ian Grigg sees financial cryptography in seven layers, being the combination of seven distinct disciplines: cryptography, software engineering, rights, accounting, governance, value, and financial applications. Business failures can often be traced to the absence of one or more of these disciplines, or to poor application of them. This views Financial Cryptography as an appropriately cross-discipline subject. Indeed, inevitably so, given that finance and cryptography are each built upon multiple disciplines. Cryptographers think of the field as originating in the work of Dr David Chaum who invented the blinded signature. This special form of a cryptographic signature permitted a virtual coin to be signed without the signer seeing the actual coin, and permitted a form of digital token money that offered untraceability. This form is sometimes known as Digital currency. A system that was widely used during the 1970s-1990s and previously developed cryptographic mechanism is the Data Encryption Standard, which was used primarily for the protection of electronic funds transfers. However, it was the work of David Chaum that excited the cryptography community about the potential of encrypted messages as actual financial instruments. As part of a business model, Financial Cryptography followed the guide of cryptography and only the simplest ideas were adopted. Account money systems protected by SSL such as PayPal and e-gold were relatively successful, but more innovative mechanisms, including blinded token money, were not. Financial cryptography is to some extent organized around the annual meeting of the International Financial Cryptography Association, which is held each year in a different location.
Views: 114 The Audiopedia
Views: 8506 Dhrubajyoti Dey
U.S. intelligence agencies accuse Russia of hacking the 2016 presidential election, a Ben Ferguson travels to Tel Aviv to find out how Israel is on its way to becoming the world's top cyber superpower. Subscribe to VICE News here: http://bit.ly/Subscribe-to-VICE-News Check out VICE News for more: http://vicenews.com Follow VICE News here: Facebook: https://www.facebook.com/vicenews Twitter: https://twitter.com/vicenews Tumblr: http://vicenews.tumblr.com/ Instagram: http://instagram.com/vicenews More videos from the VICE network: https://www.fb.com/vicevideo #VICEonHBO
Views: 3648133 VICE News
Whether or not it's worth investing in, the math behind Bitcoin is an elegant solution to some complex problems. Hosted by: Michael Aranda Special Thanks: Dalton Hubble Learn more about Cryptography: https://www.youtube.com/watch?v=-yFZGF8FHSg ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Bella Nash, Kevin Bealer, Mark Terrio-Cameron, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Will and Sonja Marple, Philippe von Bergen, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://bitinfocharts.com/ https://chrispacia.wordpress.com/2013/09/02/bitcoin-mining-explained-like-youre-five-part-2-mechanics/ https://www.youtube.com/watch?v=Lx9zgZCMqXE https://www.youtube.com/watch?v=nQZUi24TrdI https://bitcoin.org/en/how-it-works http://www.forbes.com/sites/investopedia/2013/08/01/how-bitcoin-works/#36bd8b2d25ee http://www.makeuseof.com/tag/how-does-bitcoin-work/ https://blockchain.info/charts/total-bitcoins https://en.bitcoin.it/wiki/Controlled_supply https://www.bitcoinmining.com/ http://bitamplify.com/mobile/?a=news Image Sources: https://commons.wikimedia.org/wiki/File:Cryptocurrency_Mining_Farm.jpg
Views: 2729385 SciShow
US President Trump issued an executive order Wednesday declaring a national emergency and prohibiting US companies from using equipment from foreign telecoms if they are believed to pose a national security risk. Although no specific companies was singled out Huawei among other Chinese tech companies are understood to be the target. What will this mean for big tech companies of China and will the Chinese government retaliate in kind? Starring Tom Merritt, Sarah Lane, Roger Chang and Justin Robert Young. Support Daily Tech News Show! https://www.dailytechnewsshow.com/support Quick Hits: https://asia.nikkei.com/Business/Companies/Samsung-and-Huawei-drop-lawsuits-in-latest-smartphone-truce https://9to5mac.com/2019/05/15/steam-link-ios-launch/ https://venturebeat.com/2019/05/16/amazon-launches-upgraded-amazon-fire-7-tablet-with-full-alexa-hands-free-mode/ https://techcrunch.com/2019/05/16/rip-instagram-direct-app/ Top Stories: https://www.reuters.com/article/us-microsoft-sony/microsoft-sony-partner-on-streaming-games-chips-and-ai-idUSKCN1SM24E?feedType=RSS&feedName=technologyNews https://www.theverge.com/2019/5/16/18627719/google-works-with-nest-shutdown-clarification-statement-update https://techcrunch.com/2019/05/15/google-recalls-its-bluetooth-titan-security-keys-because-of-a-security-bug/ https://www.japantimes.co.jp/news/2019/05/15/national/japan-plans-create-10-billion-14-digit-phone-numbers-5g-era-approaching/#.XN1INo5KiUm https://eng.umd.edu/release/helping-robots-remember-hyperdimensional-computing-theory-could-change-the-way-ai-works http://dailytechheadlines.com Discussion Story: https://techcrunch.com/2019/05/15/trump-declares-national-emergency-to-protect-u-s-networks-from-foreign-espionage/ https://www.washingtonpost.com/world/national-security/trump-signs-order-to-protect-us-networks-from-foreign-espionage-a-move-that-appears-to-target-china/2019/05/15/d982ec50-7727-11e9-bd25-c989555e7766_story.html?utm_term=.e21cd20016a6 https://www.commerce.gov/news/press-releases/2019/05/president-trump-declares-national-emergency-secure-information-and https://www.bbc.com/news/world-us-canada-48289550 https://www.reuters.com/article/us-usa-trade-china-huawei-analysis/blacklist-mess-huaweis-105-billion-business-at-stake-after-u-s-broadside-idUSKCN1SM123?feedType=RSS&feedName=technologyNews https://www.bbc.com/news/world-us-canada-48299522 https://www.reuters.com/article/us-usa-china-huawei-tech/huawei-to-challenge-u-s-export-sanction-which-it-says-will-harm-america-idUSKCN1SM23I?feedType=RSS&feedName=technologyNews https://techcrunch.com/2019/05/15/us-blacklist-huawei-70-affiliates/ https://www.reuters.com/article/us-huawei-security-france/macron-says-it-is-not-frances-aim-to-block-huawei-idUSKCN1SM0UU?feedType=RSS&feedName=technologyNews https://www.reuters.com/article/us-usa-cyber-china/amid-trade-huawei-furors-u-s-house-panel-launches-china-deep-dive-idUSKCN1SM1PV?feedType=RSS&feedName=technologyNews https://www.reuters.com/article/us-netherlands-huawei-tech/dutch-spy-agency-investigating-alleged-huawei-backdoor-volkskrant-idUSKCN1SM0UY?feedType=RSS&feedName=technologyNews https://www.reuters.com/article/us-germany-huawei/europe-must-maintain-own-course-after-u-s-blacklisting-of-huawei-germany-idUSKC News from you: http://dailytechnewsshow.reddit.com Today’s guest: Justin Robert Young http://nightattack.tv/album http://freepoliticalnewsletter.com https://actionnewsgame.com http://twitch.tv/justinryoung http://thecontender.us http://www.politicspoliticspolitics.com http://stickersordiaf.com http://nightattack.tv @JustinRYoung Next guest: Ant Pruitt http://www.patreon.com/antpruitt https://antpruitt.com https://www.techrepublic.com/meet-the-team/us/ant-pruitt/ @ant_pruitt http://dtns.bigcartel.com http://www.dailytechnewsshow.com/support http://www.technology.fm/dtns http://dtns.tv/wiki http://sarahlane.com https://twitter.com/sarahlane https://medium.com/@sarahlane http://tommerrittbooks.com/blog/2018/6/22/gallium http://swordandlaser.com/store http://frogpants.com/currentgeek http://www.cordkillers.com http://www.damnfinepodcast.com
Views: 1309 Daily Tech News Show
Read by Maithi from the English language Wikipedia. Source: http://en.wikipedia.org/wiki/IPsec Correct on: 26/11/14
Views: 458 WikiReadings
Using EA and EEA to solve inverse mod.
Views: 416279 Emily Jane
What is EAVESDROPPING? What does EAVESDROPPING mean? EAVESDROPPING meaning - EAVESDROPPING definition - EAVESDROPPING 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 Eavesdropping is secretly listening to the private conversation of others without their consent, as defined by Black's Law Dictionary. The practice is commonly believed to be unethical. The verb eavesdrop is a back-formation from the noun eavesdropper ("a person who eavesdrops"), which was formed from the unrelated noun eavesdrop ("the dripping of water from the eaves of a house; the ground on which such water falls"). An eavesdropper was someone who stands at the eavesdrop (where the water drops, i.e., next to the house) so as to hear what is said within. The PBS documentaries, Inside the Court of Henry VIII (April 8, 2015) and Secrets of Henry VIII’s Palace (June 30, 2013) include segments that display and discuss "eavedrops", carved wooden figures Henry VIII had built into the eaves (overhanging edges of the beams in the ceiling) of Hampton Court to discourage unwanted gossip or dissension from the King's wishes and rule, to foment paranoia and fear, and demonstrate that everything said there was being overheard; literally, that the walls had ears. Eavesdropping can also be done over telephone lines, email, and other methods of instant messaging considered private. (If a message is broadcast, it is not considered eavesdropping.) VoIP communications software is also vulnerable to electronic eavesdropping via infections such as trojans. Network eavesdropping is a network layer attack that focuses on capturing small packets from the network transmitted by other computers and reading the data content in search of any type of information. This type of network attack is generally one of the most effective as a lack of encryption services are used. It is also linked to the collection of metadata. Those who perform this type of attack are generally black hat hackers; however, government agencies, such as the National Security Agency, have also been connected.
Views: 2076 The Audiopedia
Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Home page: https://www.3blue1brown.com/ Brought to you by you: http://3b1b.co/btc-thanks And by Protocol Labs: https://protocol.ai/join/ Some people have asked if this channel accepts contributions in cryptocurrency form. Indeed! http://3b1b.co/crypto 2^256 video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT ------------------ Animations largely made using manim, a scrappy open source python library. https://github.com/3b1b/manim If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and has many other quirks you might expect in a library someone wrote with only their own use in mind. Music by Vincent Rubinetti. Download the music on Bandcamp: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown Stream the music on Spotify: https://open.spotify.com/album/1dVyjwS8FBqXhRunaG5W5u If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people. ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 2554934 3Blue1Brown
Honey Pot Systems are decoy servers or systems setup to gather information regarding an attacker or intruder into your system. It is important to remember that Honey Pots do not replace other traditional Internet security systems; they are an additional level or system. Honey Pots can be setup inside, outside or in the DMZ of a firewall design or even in all of the locations although they are most often deployed inside of a firewall for control purposes. In a sense, they are variants of standard Intruder Detection Systems (IDS) but with more of a focus on information gathering and deception.
Views: 12448 TechnologyFirst
What is SECURE SHELL? What does SECURE SHELL mean? SECURE SHELL meaning - SECURE SHELL definition - SECURE SHELL 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 Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH. The protocol specification distinguishes between two major versions, referred to as SSH-1 and SSH-2. The most visible application of the protocol is for access to shell accounts on Unix-like operating systems, but it sees some limited use on Windows as well. In 2015, Microsoft announced that they would include native support for SSH in a future release. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols such as the Berkeley rlogin, rsh, and rexec protocols. Those protocols send information, notably passwords, in plaintext, rendering them susceptible to interception and disclosure using packet analysis. The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet, although files leaked by Edward Snowden indicate that the National Security Agency can sometimes decrypt SSH, allowing them to read the contents of SSH sessions. On 6 July 2017 the government transparency organization WikiLeaks confirmed that the US Central Intelligence Agency had developed hacking tools to crack the SSH protocols used by the Microsoft Windows and Linux operating systems by publishing the official "User Guides" for those tools.
Views: 287 The Audiopedia
RECOMMENDED INTRUSION DETECTION SYSTEM PRODUCTS: ✪✪✪✪✪ Fortress Security Store S03 WiFi and Landline Security Alarm System Classic Kit Wireless Home Security System Compatible with Alexa and App Controlled. BUY FROM AMAZON - https://amzn.to/2S5Xxas ✪✪✪✪✪ ✪✪✪✪✪ Fortinet FortiGate 30E Network Security/Firewall Appliance. BUY FROM AMAZON - https://amzn.to/2SdTFnK ✪✪✪✪✪ ✪✪✪✪✪ GRYPHON - High Grade Mesh WiFi Security Parental Control Router - Hack Protection w/AI-Intrusion Detection & ESET Malware Protection, AC3000 Tri-Band, Smart Mesh Wireless System w/App. BUY FROM AMAZON - https://amzn.to/2WnkHZh ✪✪✪✪✪ What is INTRUSION DETECTION SYSTEM? What does INTRUSION DETECTION SYSTEM mean? INTRUSION DETECTION SYSTEM meaning - INTRUSION DETECTION SYSTEM definition - INTRUSION DETECTION SYSTEM explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. An intrusion detection system (IDS) is a device or software application that monitors a network or systems for malicious activity or policy violations. Any detected activity or violation is typically reported either to an administrator or collected centrally using a security information and event management (SIEM) system. A SIEM system combines outputs from multiple sources, and uses alarm filtering techniques to distinguish malicious activity from false alarms. There is a wide spectrum of IDS, varying from antivirus software to hierarchical systems that monitor the traffic of an entire backbone network. The most common classifications are network intrusion detection systems (NIDS) and host-based intrusion detection systems (HIDS). A system that monitors important operating system files is an example of a HIDS, while a system that analyzes incoming network traffic is an example of a NIDS. It is also possible to classify IDS by detection approach: the most well-known variants are signature-based detection (recognizing bad patterns, such as malware) and anomaly-based detection (detecting deviations from a model of "good" traffic, which often relies on machine learning). Some IDS have the ability to respond to detected intrusions. Systems with response capabilities are typically referred to as an intrusion prevention system. Though they both relate to network security, an IDS differs from a firewall in that a firewall looks outwardly for intrusions in order to stop them from happening. Firewalls limit access between networks to prevent intrusion and do not signal an attack from inside the network. An IDS evaluates a suspected intrusion once it has taken place and signals an alarm. An IDS also watches for attacks that originate from within a system. This is traditionally achieved by examining network communications, identifying heuristics and patterns (often known as signatures) of common computer attacks, and taking action to alert operators. A system that terminates connections is called an intrusion prevention system, and is another form of an application layer firewall. Some systems may attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system. Intrusion detection and prevention systems (IDPS) are primarily focused on identifying possible incidents, logging information about them, and reporting attempts. In addition, organizations use IDPSes for other purposes, such as identifying problems with security policies, documenting existing threats and deterring individuals from violating security policies. IDPSes have become a necessary addition to the security infrastructure of nearly every organization. IDPSes typically record information related to observed events, notify security administrators of important observed events and produce reports. Many IDPSes can also respond to a detected threat by attempting to prevent it from succeeding. They use several response techniques, which involve the IDPS stopping the attack itself, changing the security environment (e.g. reconfiguring a firewall) or changing the attack's content. Intrusion prevention systems (IPS), also known as intrusion detection and prevention systems (IDPS), are network security appliances that monitor network or system activities for malicious activity. The main functions of intrusion prevention systems are to identify malicious activity, log information about this activity, report it and attempt to block or stop it.. Intrusion prevention systems are considered extensions of intrusion detection systems because they both monitor network traffic and/or system activities for malicious activity. The main differences are, unlike intrusion detection systems, intrusion prevention systems are placed in-line and are able to actively prevent or block intrusions that are detected. IPS can take such actions as sending an alarm, dropping detected malicious packets, resetting a connection or blocking traffic from the offending IP address.
Views: 11443 The Audiopedia
This is an audio version of the Wikipedia Article: https://en.wikipedia.org/wiki/Privacy-Enhanced_Mail 00:02:20 Examples 00:08:31 Privacy-enhanced mail Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago. Learning by listening is a great way to: - increases imagination and understanding - improves your listening skills - improves your own spoken accent - learn while on the move - reduce eye strain Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone. Listen on Google Assistant through Extra Audio: https://assistant.google.com/services/invoke/uid/0000001a130b3f91 Other Wikipedia audio articles at: https://www.youtube.com/results?search_query=wikipedia+tts Upload your own Wikipedia articles through: https://github.com/nodef/wikipedia-tts Speaking Rate: 0.9123547330438969 Voice name: en-US-Wavenet-E "I cannot teach anybody anything, I can only make them think." - Socrates SUMMARY ======= Privacy-Enhanced Mail (PEM) is a de facto file format for storing and sending cryptographic keys, certificates, and other data, based on a set of 1993 IETF standards defining "privacy-enhanced mail." While the original standards were never broadly adopted, and were supplanted by PGP and S/MIME, the textual encoding they defined became very popular. The PEM format was eventually formalized by the IETF in RFC 7468. Many cryptography standards use ASN.1 to define their data structures, and Distinguished Encoding Rules (DER) to serialize those structures. Because DER produces binary output, it can be challenging to transmit the resulting files through systems, like electronic mail, that only support ASCII. The PEM format solves this problem by encoding the binary data using base64. PEM also defines a one-line header, consisting of "-----BEGIN ", a label, and "-----", and a one-line footer, consisting of "-----END ", a label, and "-----". The label determines the type of message encoded. Common labels include "CERTIFICATE", "CERTIFICATE REQUEST", and "PRIVATE KEY". PEM data is commonly stored in files with a ".pem" suffix, a ".cer" or ".crt" suffix (for certificates), or a ".key" suffix (for public or private keys). The label inside a PEM file represents the type of the data more accurately than the file suffix, since many different types of data can be saved in a ".pem" file. A PEM file may contain multiple instances. For instance, an operating system might provide a file containing a list of trusted CA certificates, or a web server might be configured with a "chain" file containing an end-entity certificate plus a list of intermediate certificates.
Views: 24 wikipedia tts
~~~ Encryption ~~~ Title: What is Encryption? Explain Encryption, Define Encryption, Meaning of Encryption Created on: 2018-08-22 Source Link: https://en.wikipedia.org/wiki/Encryption ------ Description: In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot. Encryption does not itself prevent interference, but denies the intelligible content to a would-be interceptor. In an encryption scheme, the intended information or message, referred to as plaintext, is encrypted using an encryption algorithm – a cipher – generating ciphertext that can be read only if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. It is in principle possible to decrypt the message without possessing the key, but, for a well-designed encryption scheme, considerable computational resources and skills are required. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients but not to unauthorized users. ------ To see your favorite topic here, fill out this request form: https://docs.google.com/forms/d/e/1FAIpQLScU0dLbeWsc01IC0AaO8sgaSgxMFtvBL31c_pjnwEZUiq99Fw/viewform ------ Source: Wikipedia.org articles, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Support: Donations can be made from https://wikimediafoundation.org/wiki/Ways_to_Give to support Wikimedia Foundation and knowledge sharing.
Views: 26 Audioversity
MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Nickolai Zeldovich In this lecture, Professor Zeldovich gives a brief overview of the class, summarizing class organization and the concept of threat models. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 395699 MIT OpenCourseWare
A Network Authentication Protocol authenticate the identity claim of a client once it wants to connect to a Network. In this video, I have discussed 3 x network authentication protocols i.e. Password Authentication Protocol (PAP), Challenge handshake authentication protocol (CHAP), extensible authentication protocol (EAP). PAP https://en.m.wikipedia.org/wiki/Password_Authentication_Protocol CHAP https://en.m.wikipedia.org/wiki/Challenge-Handshake_Authentication_Protocol EAP https://en.m.wikipedia.org/wiki/Extensible_Authentication_Protocol
Views: 582 Cyber Security Entertainment
At the headquarters of Cloudflare, in San Francisco, there's a wall of lava lamps: the Entropy Wall. They're used to generate random numbers and keep a good bit of the internet secure: here's how. Thanks to the team at Cloudflare - this is not a sponsored video, they just had interesting lava lamps! There's a technical rundown of the system on their blog here: https://blog.cloudflare.com/lavarand-in-production-the-nitty-gritty-technical-details Edited by Michelle Martin, @mrsmmartin I'm at http://tomscott.com on Twitter at http://twitter.com/tomscott on Facebook at http://facebook.com/tomscott and on Snapchat and Instagram as tomscottgo
Views: 1370745 Tom Scott
✔ Free Crypto-Coins: https://crypto-airdrops.de ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ . ✔ Free Crypto-Coins: https://crypto-airdrops.de ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄ lll➤ Free Video-Chat: http://18cam.net ) More about Brute force attacks on MACs and Hash Function concepts in this Informatics lecture. This is what you will learn in this lesson. Also have a look at the other parts of the course, and thanks for watching. In cryptography, a message authentication code (often MAC) is a short piece of information used to authenticate a message and to provide integrity and authenticity assurances on the message. Integrity assurances detect accidental and intentional message changes, while authenticity assurances affirm the message's origin. http://en.wikipedia.org/wiki/Message_authentication_code This video was made by another YouTube user and made available for the use under the Creative Commons licence "CC-BY". His channel can be found here: https://www.youtube.com/user/StevesLectures
Views: 878 Lernvideos und Vorträge
Like my T-Shirt? Here's a link to purchase it. https://amzn.to/2ILxv94 IT Dojo offers free CISSP study questions for those who are preparing for their certification every day. In today's CISSP questions of the day from IT Dojo, Colin Weaver asks and answers questions related to Access Control. Colin also teaches 5 Day CISSP classes regularly in Virginia Beach, VA. If you are interested in attending one of his courses, please visit our website to inquire for more details. www.itdojo.com #CISSPquestions, #CISSPpreparation, #CISSPinstructor, #CISSPcourse, #CISSPresources, #cybersecurity, #informationassurance Relevant Links https://en.wikipedia.org/wiki/Trade_secret https://www.tradesecretsinsider.com/protecting-trade-secrets-furnished-to-the-government/ - https://www.slideshare.net/fitceo/using-motive-opportunity-and-means-mom-and-iso-27001-as-cyber-crime-prevention-methods - https://www.perform.illinois.edu/Papers/USAN_papers/10VAN01.pdf
Views: 969 IT Dojo
Israel's Prime Minister has kicked off his re-election campaign, with a well-funded operation, much of which is coming from abroad. More than 230,000 dollars has come in from various donors in the United States. It makes up almost 90% of Benjamin Netanyahu's re-election funds, most of it coming just from three American families. But even all that money can't buy popularity - Bibi's ratings are languishing, as voters look to alternatives, as Paula Slier reports. RT LIVE http://rt.com/on-air Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday Like us on Facebook http://www.facebook.com/RTnews Follow us on Twitter http://twitter.com/RT_com Follow us on Instagram http://instagram.com/rt Follow us on Google+ http://plus.google.com/+RT Listen to us on Soundcloud: https://soundcloud.com/rttv RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.
Views: 15959 RT
12-02-2018 Were you listening to me, Neo? Or were you looking at the woman in the red dress? 0:10 Intro 0:54 Competition 5:15 Problems They Solve 7:30 Aims 10:30 Market 13:13 Blockchain 14:29 Tech 16:29 Token Use 18:09 ICO Details 21:15 Bounty 22:02 Roadmap 24:29 Team 26:24 Partners 27:05 Community 28:27 Verdict Morpheus Network. The Morpheus.Network was designed in consultation with some of the world’s largest shipping, customs & banking firms to create a full-service, global, automated, supply chain platform with an integrated cryptocurrency payment system utilizing blockchain technology. https://morpheus.network Morpheus Network Whitepaper https://morpheus.network/whitepaper Morpheus Network Bounty Campaign https://bitcointalk.org/index.php?topic=2818233.0 5 companies using blockchain to drive their supply chain https://www.techrepublic.com/article/5-companies-using-blockchain-to-drive-their-supply-chain/ SWIFT profits slump following string of cyber-attacks on banks https://www.v3.co.uk/v3-uk/news/3011760/swift-profits-slump-after-string-of-cyber-attacks-on-banks Global supply-chain finance refers to the set of solutions available for financing specific goods and/or products as they move from origin to destination along the supply chain. https://en.wikipedia.org/wiki/Global_supply-chain_finance Supply chain management (SCM) software (including procurement) market revenue worldwide, from 2008 to 2021 (in million U.S. dollars) https://www.statista.com/statistics/271214/global-supply-chain-management-software-market-revenue/ The ICO I am advising is here: https://www.sureindustrial.com/ Please subscribe for the latest news and updates. It's early days but we are going to announce some major partnerships and team members in due course! I was not paid or sponsored to do this video, this is my own opinion and as I am not a financial adviser, this video should not be taken as financial advice. Always invest at your own risk and never invest more than you can afford to lose. Donations are very much appreciated if you like my content and want to support my channel. BTC: 1J4ifExyozP66KPMMZApMWQLrxHrs3hEDJ LTC: LhHuLC1AJCZGGbc6cL9wnJmqgBQNxLRiyU ETH: 0x00a7c5e2f95B0d79d8F5FddFCa85dBBd098b8A9d For a 3% discount on Genesis Mining please use my code 2J5yMr https://www.genesis-mining.com/a/960181 Hashflare cloud mining: https://hashflare.io/r/DB4A0EE6 Follow me on Twitter @cryptonomatron https://twitter.com/Cryptonomatron Follow me on InvestFeed: http://www.investfeed.com/Cryptonomatron Follow me on Steem https://steemit.com/@bangkokhearts Follow me on Facebook: https://www.facebook.com/Cryptonomatron/
Views: 3968 The Cryptonomatron
Michael Aranda explains five of the worst computer viruses that have hit the net! Hosted by: Michael Aranda ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters -- we couldn't make SciShow without them! Shout out to Justin Ove, Andreas Heydeck, Justin Lentz, Will and Sonja Marple, Benny, Chris Peters, Tim Curwick, Philippe von Bergen, Patrick, Fatima Iqbal, Lucy McGlasson, Mark Terrio-Cameron, Accalia Elementia, Kathy & Tim Philip, charles george, Kevin Bealer, Thomas J., and Patrick D. Ashmore. ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: Melissa: http://www.networkworld.com/article/2235008/data-center/melissa-virus-turning-10------age-of-the-stripper-unknown-.html https://www.sans.org/security-resources/idfaq/what-was-the-melissa-virus-and-what-can-we-learn-from-it/5/3 http://www.pandasecurity.com/mediacenter/malware/most-famous-virus-history-melissa/ https://www.f-secure.com/v-descs/melissa.shtml http://www.cnn.com/TECH/computing/9904/02/melissa.arrest.03/index.html?eref=yahoo http://www.nytimes.com/2002/05/02/nyregion/creator-of-melissa-virus-gets-20-months-in-jail.html ILOVEYOU: http://www.pcmag.com/article2/0,2817,2363172,00.asp http://www.bbc.com/news/10095957 http://money.cnn.com/2000/05/05/technology/loveyou/ http://motherboard.vice.com/read/love-bug-the-virus-that-hit-50-million-people-turns-15 Slammer: http://www.wired.com/2003/07/slammer/ https://www.f-secure.com/v-descs/mssqlm.shtml http://www.icsi.berkeley.edu/pubs/networking/insidetheslammerworm03.pdf Storm Worm: https://www.symantec.com/security_response/writeup.jsp?docid=2001-060615-1534-99&tabid=2 http://www.informationweek.com/storm-worm-erupts-into-worst-virus-attack-in-2-years/d/d-id/1057418 http://krebsonsecurity.com/2010/04/infamous-storm-worm-stages-a-comeback/ https://www.schneier.com/blog/archives/2007/10/the_storm_worm.html Mebroot/Torpig: https://seclab.cs.ucsb.edu/media/uploads/papers/torpig.pdf https://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/your_computer_is_now_stoned.pdf https://www.secureworks.com/research/top-banking-botnets-of-2013 http://news.bbc.co.uk/2/hi/technology/7701227.stm https://css.csail.mit.edu/6.858/2009/readings/torpig.pdf Images: Servers: https://commons.wikimedia.org/wiki/File:Wikimedia_Servers-0051_18.jpg
Views: 5058591 SciShow