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Symmetric Key and Public Key Encryption
 
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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: 439241 itfreetraining
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 601031 Art of the Problem
Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
 
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This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 441406 Art of the Problem
Cryptography: Transposition Cipher
 
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This lesson explains how to encrypt and decrypt a message using a transposition cipher. Site: http://mathispower4u.com
Views: 54977 Mathispower4u
Quantum Cryptography Explained
 
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This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 263563 Physics Girl
21. Cryptography: Hash Functions
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 65463 MIT OpenCourseWare
How secure is 256 bit security?
 
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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 Thread for Q&A questions: http://3b1b.co/questions 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 a 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: 834523 3Blue1Brown
Visuelle Demo Blockchain, Proof of Work, Hash, Private & Public Key, Signatur, Verschlüsselung
 
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Dieses mal zeige ich dir wie eine Blockchain wirklich funktioniert: Beginnend bei Hash, Private & Public Key, Signatur, Verschlüsselung, Block, Proof of Work und Blockchain insgesamt Hier findest du alle Demos: https://www.bitfantastic.com/demo/ Jede Blockchain benutzt eine kryptographische Hashfunktion. Bei Bitcoin ist es bspw. Die SHA256-Hashfunktion. Eine Hashfunktion ist ein Algorithmus, der eine Zeichenfolge von beliebiger Länge in eine Zeichenfolge fixer Länge umwandelt; diese wird Hashwert genannt. Eine Hashfunktion ist deterministisch, d.h. dieselben Eingangsdaten ergeben immer denselben Hashwert. Zudem führt jede Veränderung der Eingangsdaten zu einem stark veränderten Hashwert. Grundsätzlich ist die Blockchain ein elektronisches Register für digitale Datensätze, Ereignisse oder Transaktionen, die durch die Teilnehmer eines verteilten Rechnernetzes verwaltet werden. Eine Blockchain definiert sich als eine Art Datenbank, in der Einträge in Blöcken gruppiert werden. Diese Blöcke sind in chronologischer Reihenfolge über eine kryptographische Signatur miteinander verknüpft. Jeder Block enthält Aufzeichnungen valider Netzwerkaktivität seit dem Hinzufügen des letzten Blocks. Im Falle von Bitcoin umfasst dies beispielsweise die durchgeführten Transaktionen. Dabei muss ein Hashwert solange verändert werden, bis er mit einem bestimmten Muster übereinstimmt. Das ist der Schwierigkeitsgrad bzw. Difficulty-Algorithmus. Die Nonce, ist eine Zeichenfolge, die beliebig gewählt werden kann, muss nun so oft verändert werden, bis der Hash-Wert des Block-Headers unter dem vordefinierten Zielwert liegt. Der Mining-Netzknoten, der den entsprechenden Hash-Wert zuerst findet, sendet seinen Block an das Netzwerk; die Netzknoten berechnen nun ebenfalls den Hash-Wert und nehmen den Block, falls die Lösung valide ist, in ihre Blockchain auf. Folglich gilt eine Transaktion erst dann als vollzogen, wenn sie in die Blockchain aufgenommen wurde. #bitfantastic #bitcoin #blockchain #ethereum #ripple #bch #bct #xbt #eth #xrp #cryptofit #crypto #Hash #Signatur #Verschlüsselung #Block #ProofofWork Hallo und Herzlich Willkommen auf BITFANTASTIC. Mein Name ist Eduard Prinz und in meinen Videos geht es um Blockchain, Bitcoin, Ethereum, Dash, Iota, Ripple und sonstige sinnvolle Kryptowährungen und Blockchain Anwendungen und Services der Zukunft. Ich möchte euch einerseits die Grundlagen der Blockchain Technologie, der Kryptografie, der Programmierung im Bereich der Blockchain und Kryptowährung aber auch im Bereich Investment in Crypto Currency und worauf man achten sollte, zeigen. Es wird Tutorials auf technischer Ebene und ein Diskurs mit dir zusammen über schlaues und rationales investieren in die Zukunft geben;) Viel Spaß wünscht Dein Eduard Prinz, MSc BSc (computer science) ☞ Teile das Video gerne, wenn es dir gefallen hat ;) ABONNIERT den Kanal kostenlos und VERGESST NICHT DIE GLOCKE ANZUSCHALTEN ;) Bitte hinterlasse gerne deine Meinung zu dem Thema! Danke für deine Unterstützung ;) Bitcoins sind eine elektronische Währung, manchmal auch Kryptowährung genannt. Sie basiert auf einer Blockchain. Die Identität des Gründers, Satoshi Nakamoto, ist unbekannt. SATOSHI NAKAMOTO Ist ein Pseudonym für Erfinder des Blockchainalgorithmus und der Recheneinheit Bitcoin. Er hat im November 2008 die Referenzimplementierung Bitcoin Core entwickelt und veröffentlicht. Welche Person oder Personengruppe sich tatsächlich hinter diesem Pseudonym verbirgt, ist bis heute unbekannt. Der Proof of Work (PoW) ist ein Verfahren zum Prüfen und Verifizieren von Transaktionen, die in verschiedenen Blöcken gespeichert werden. Geprüft wird auf Richtigkeit und Vollständigkeit basierend auf einem physikalischen Nachweis in Form von Thermischer Energie (Wärmeentwicklung) die durch Rechenleistung (also Arbeitsaufwand) entstanden ist. Diese und weitere spannende Themen im Bereich: ALGORITHMUS,ALTCOINS KAUFEN,BITCOIN KAUFEN,BITCOIN VERKAUFEN,BLOCK,BLOCKCHAIN,BROKER,BUCHHALTUNG,BÖRSE,CRYPTOCURRENCY,CRYPTO CURRENCY, MINER,DISTRIBUTED LEDGER,DOUBLE SPEND, HANDEL,HASH,HASH CASH,KRYPTO-BÖRSE,KRYPTOGRAFIE,KRYPTOGRAPHIE, KRYPTOWÄHRUNG,NAKAMOTO,P2P,CASH,PEER-TO-PEER,CASH,PROOF OF STAKE,PROOF OF WORK,QUELLCODE,SATOSHI,NAKAMOTO, BLOCKCHAIN, BITCOIN, ETHEREUM, KRYPTOWÄHRUNG, CRYPTO CURRENCY, KRYPTOGRAFIE, DIGITALES GELD, BITCOIN VIDEOS, BITCOIN TV, BITCOIN NEWS, BITCOIN NACHRICHTEN, BITCOIN BLOG, BITCOIN DEUTSCH, BITCOIN NEWS DEUTSCH auf BITFANTASTIC.com und hier auf diesem Blockchain und Kryptwährungen Kanal der Zukunft. Bilderquelle: de.fotolia.com, Pixabay.com, Google lizenzfreie Bilder ACHTUNG: Ich bin kein Steuerberater und für die Richtigkeit der Infos in diesem Video übernehme ich keine Gewähr. Erkundige dich im Zweifel beim Steuerberater deines Vertrauens. In diesem Video werden keine Garantien oder Versprechungen zu Gewinnen gemacht. Alle Aussagen in diesem und anderen Videos entsprechen meiner subjektiven Meinung. Musik
How SSL works tutorial - with HTTPS example
 
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How SSL works by leadingcoder. This is a full tutorial how to setup SSL that requires client certificate for reference: http://www.windowsecurity.com/articles/Client-Certificate-Authentication-IIS6.html .
Views: 1343771 tubewar
Introduction to Cryptography
 
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Introduction to Cryptography, includes Modular Arithmetic and Numerical Representation tutorial
Views: 1040 Daniel Rees
Double Slit Experiment explained! by Jim Al-Khalili
 
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"If you can explain this using common sense and logic, do let me know, because there is a Nobel Prize for you.." Professor Jim Al-Khalili explains the experiment that reveals the "central mystery of quantum mechanics" - the double slit experiment. Watch the full lecture here: http://www.youtube.com/watch?v=wwgQVZju1ZM Sometimes called the "two-slit" or "Young's" experiment, it demonstrates that matter and energy can display the characteristics of both waves and particles, establishing the principle known as wave-particle duality. Furthermore, it questions the role of the observer in the outcome of events and demonstrates the fundamental limitation of an observer to predict experimental results. For this reason, Richard Feynman called it "a phenomenon which is impossible ... to explain in any classical way, and which has in it the heart of quantum mechanics. In reality, it contains the only mystery [of quantum mechanics]," (see more at http://en.wikipedia.org/wiki/Double-slit_experiment). The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter
Views: 1430829 The Royal Institution
Elliptic Curve Cryptography Overview
 
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John Wagnon discusses the basics and benefits of Elliptic Curve Cryptography (ECC) in this episode of Lightboard Lessons. Check out this article on DevCentral that explains ECC encryption in more detail: https://devcentral.f5.com/articles/real-cryptography-has-curves-making-the-case-for-ecc-20832
Views: 145994 F5 DevCentral
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?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: 416461 Khan Academy
Communications Encryption for Preppers - Part 1 - One Time Pad
 
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One Time Pad Cheat Sheet: https://lrnsr.co/uHvD Part 2: https://lrnsr.co/eOX3 Wikipedia article One Time Pad: https://lrnsr.co/QE34 You should NOT use this encryption method with your HAM radio, because doing so is illegal as defined by the FCC. Encryption Example: One Time Pad Characters: CB2F8 1SHRF 1GFZH EOCMS KM0ON 0AOG9 Ciphertext: KGQJ8 IOW8J GGW3K 2SUTS VXD26 5E0X Leave me an encrypted comment once you decrypt the message above! Subscribe to see more videos: https://lrnsr.co/dGDA Support this channel by shopping on Amazon: https://lrnsr.co/qBoO Support this channel by shopping on eBay: https://lrnsr.co/DOqI
The Enigma Machine Explained
 
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As technology increases, so do the methods of encryption and decryption we have at our disposal. World War II saw wide use of various codes from substitution ciphers to employing Navajo code talkers in the Pacific theater. Here, science journalist and author Simon Singh demonstrates the German enigma machine, a typewriter-like device used to encrypt communications. He demonstrates not only its operation, but both the strength and fatal flaws in its method. Watch the Full Program Here: https://youtu.be/nVVF8dgKC38 Original Program Date: June 4, 2011 The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest
Views: 436381 World Science Festival
What is POST-QUANTUM CRYPTOGRAPHY? What does POST-QUANTUM CRYPTOGRAPHY mean?
 
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What is POST-QUANTUM CRYPTOGRAPHY? What does POST-QUANTUM CRYPTOGRAPHY mean? POST-QUANTUM CRYPTOGRAPHY meaning - POST-QUANTUM CRYPTOGRAPHY definition - POST-QUANTUM 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 Post-quantum cryptography refers to cryptographic algorithms (usually public-key algorithms) that are thought to be secure against an attack by a quantum computer. This is not true for the most popular public-key algorithms, which can be efficiently broken by a sufficiently large quantum computer. The problem with the currently popular algorithms is that their security relies on one of three hard mathematical problems: the integer factorization problem, the discrete logarithm problem or the elliptic-curve discrete logarithm problem. All of these problems can be easily solved on a sufficiently powerful quantum computer running Shor's algorithm. Even though current, publicly known, experimental quantum computers are too small to attack any real cryptographic algorithm, many cryptographers are designing new algorithms to prepare for a time when quantum computing becomes a threat. This work has gained greater attention from academics and industry through the PQCrypto conference series since 2006 and more recently by several workshops on Quantum Safe Cryptography hosted by the European Telecommunications Standards Institute (ETSI) and the Institute for Quantum Computing. In contrast to the threat quantum computing poses to current public-key algorithms, most current symmetric cryptographic algorithms and hash functions are considered to be relatively secure against attacks by quantum computers. While the quantum Grover's algorithm does speed up attacks against symmetric ciphers, doubling the key size can effectively block these attacks. Thus post-quantum symmetric cryptography does not need to differ significantly from current symmetric cryptography.
Views: 154 The Audiopedia
What is Encryption and How Does it Work? | Mashable Explains
 
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Encryption & decryption technology protects your e-mails, banking transactions, and even those questionable Etsy purchases. So how does it work, exactly? Hey, Mashable Explains is back! We've got new episodes coming to you every Thursday, so make sure to subscribe! http://on.mash.to/subscribe Sorry, you’re addicted to the Internet https://www.youtube.com/watch?v=NpluiONwJLg Why do we love Snapchat so much? https://www.youtube.com/watch?v=rZln9XNTOtw MASHABLE ON YOUTUBE Subscribe to Mashable: http://on.mash.to/subscribe Mashable Explains Playlist: https://www.youtube.com/playlist?list=PLSKUhDnoJjYn0TV9V84C4Wr2DjKPc492c MASHABLE ACROSS THE WEB Mashable.com: http://on.mash.to/1hCcRpl Facebook: http://on.mash.to/1KkCTIP Twitter: http://on.mash.to/1Udp1kz Tumblr: http://on.mash.to/1NBBijY Instagram: http://on.mash.to/1U6D40z Google+: http://on.mash.to/1i27L5R Mashable is a leading global media company that informs, inspires and entertains the digital generation.
Views: 95237 Mashable
Why It's So Hard For The Government To Hack Your Phone
 
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The FBI is currently in a battle with Apple to allow encrypted phones be unlocked, but how does encryption even work? How Powerful Is Apple? ►►►► http://bit.ly/1OBOqRk Sign Up For The TestTube Newsletter Here ►►►► http://bit.ly/1myXbFG How Secure Are Fingerprint Scanners? ►►►►http://bit.ly/1R7K5qX Read More: ADVANCED ENCRYPTION STANDARD (AES) http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf "The Advanced Encryption Standard (AES) specifies a FIPS-approved cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information." "This standard may be used by Federal departments and agencies when an agency determines that sensitive (unclassified) information" Analysis of Avalanche Effect in Plaintext of DES using Binary Codes http://www.ijettcs.org/Volume1Issue3/IJETTCS-2012-10-25-097.pdf "Cryptography provides a method for securing and authenticating the transmission of information across insecure communication channels." "Symmetric keys encryption or secret key encryption identical key is used by sender and receiver." "Data can be recovered from cipher only by using exactly the same key used to encipher it." Advanced Encryption Standard (AES) http://searchsecurity.techtarget.com/definition/Advanced-Encryption-Standard "The Advanced Encryption Standard became effective as a federal government standard in 2002" "ES is one of the Suite B cryptographic algorithms used by NSA's Information Assurance Directorate in technology approved for protecting national security systems." iOS Security http://www.apple.com/business/docs/iOS_Security_Guide.pdf#page=12 "On mobile devices, speed and power efficiency are critical. Cryptographic operations are complex and can introduce performance or battery life problems if not designed and implemented with these priorities in mind." "Every iOS device has a dedicated AES 256 crypto engine built into the DMA path between the flash storage and main system memory, making file encryption highly efficient" ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Julia Wilde on Twitter https://twitter.com/julia_sci DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq Sign Up For The TestTube Mailing List: http://dne.ws/1McUJdm
Views: 325236 Seeker
What is CERTIFICATE-BASED ENCRYPTION? What does CERTIFICATE-BASED ENCRYPTION mean?
 
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What is CERTIFICATE-BASED ENCRYPTION? What does CERTIFICATE-BASED ENCRYPTION mean? CERTIFICATE-BASED ENCRYPTION meaning - CERTIFICATE-BASED ENCRYPTION definition - CERTIFICATE-BASED ENCRYPTION 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 Certificate-based encryption is a system in which a certificate authority uses ID-based cryptography to produce a certificate. This system gives the users both implicit and explicit certification, the certificate can be used as a conventional certificate (for signatures, etc.), but also implicitly for the purpose of encryption. A user Alice can doubly encrypt a message using another user's (Bob) public key and his (Bob's) identity. This means that the user (Bob) cannot decrypt it without a currently valid certificate and also that the certificate authority cannot decrypt the message as they don't have the user's private key (i.e., there is no implicit escrow as with ID-based cryptography, as the double encryption means they cannot decrypt it solely with the information they have).Certificate is the trust between two parties. Key revocation can be added to the system by requiring a new certificate to be issued as frequently as the level of security requires. Because the certificate is "public information", it does not need to be transmitted over a secret channel. The downside of this is the requirement for regular communication between users and the certificate authority, which means the certificate authority is more vulnerable to electronic attacks (such as denial-of-service attacks) and also that such attacks could effectively stop the system from working. This risk can be partially but not completely reduced by having a hierarchy of multiple certificate authorities. The best example of practical use of certificate-based encryption is Content Scrambling System (CSS), which is used to encode DVD movies in such a way as to make them playable only in a part of the world where they are sold. However, the fact that the region decryption key is stored on the hardware level in the DVD players substantially weakens this form of protection.
Views: 49 The Audiopedia
How keyloggers steal cryptocurrency and how to stop them
 
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BlockSafe Technologies CEO, George Waller, demonstrates crypto wallet security flaws by keylogging his own cryptowallet key and then uses CryptoDefender to secure his cryptocurrency from keyloggers and hackers. Keystroke Encryption Prevents malware from spying on what you type. The keystrokes are secured between the kernel and the wallet application using military grade encryption. Now, the password you enter to logon or decrypt your secret key is safe. Clipboard copy protection Prevents malware from monitoring the clipboard to spy on, copy and paste the contents of the clipboard. So the destination address to which a crypto transaction is sent to is not modified. Anti-screen capture Prevents screen-scraping malware from taking screenshots of information surreptitiously. Anti-Clickjacking Displays hidden frames or frames originating from a potentially malicious domain. This neutralizes one of the favorite tricks of the hackers to download malware onto your computer. CryptoDefender™ for mobile devices has the following features: Secure Keyboard Prevents the OS and malware from logging your keystrokes. All keystrokes entered in the custom keyboard are encrypted. Now, the password you enter to logon or decrypt your secret key is safe. Secure Browser Is a custom, secure locked-down browser that prevents the storage of cookies and other malware artifacts. The secure browser is recreated for every session. Now, you can safely access your online wallet or exchange. Password/Data Vault Enables the AES-256 encrypted storage of passwords, keys and data. Access to the vault can be secured via fingerprint. The Secure Browser can be launched from within the vault. Strong Password Generator This creates strong passwords based on user-defined preferences, and then stores them in the Password Vault for future usage.
Views: 225 Scott Schober
Proving Security Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 3466 Udacity
CCS 2016 - Identity-Concealed Authenticated Encryption and Key Exchange
 
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Authors: Yunlei Zhao (Fudan University) presented at CCS 2016 - the 23rd ACM Conference on Computer and Communications Security (Hofburg Palace Vienna, Austria / October 24-28, 2016) - organized by SBA Research
Views: 126 CCS 2016
What is RELATED-KEY ATTACK? What does RELATED-KEY ATTACK mean? RELATED-KEY ATTACK meaning
 
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What is RELATED-KEY ATTACK? What does RELATED-KEY ATTACK mean? RELATED-KEY ATTACK meaning - RELATED-KEY ATTACK definition - RELATED-KEY ATTACK explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, a related-key attack is any form of cryptanalysis where the attacker can observe the operation of a cipher under several different keys whose values are initially unknown, but where some mathematical relationship connecting the keys is known to the attacker. For example, the attacker might know that the last 80 bits of the keys are always the same, even though he doesn't know, at first, what the bits are. This appears, at first glance, to be an unrealistic model; it would certainly be unlikely that an attacker could persuade a human cryptographer to encrypt plaintexts under numerous secret keys related in some way. KASUMI is an eight round, 64-bit block cipher with a 128-bit key. It is based upon MISTY1, and was designed to form the basis of the 3GPP (3rd Generation Partnership Project) confidentiality and integrity algorithms. 3GPP is the body standardizing the next generation of mobile telephony. Mark Blunden and Adrian Escott described differential related key attacks on five and six rounds of KASUMI. Differential attacks were introduced by Biham and Shamir. Related key attacks were first introduced by Biham. Differential related key attacks are discussed in Kelsey et al. An important example of a cryptographic protocol that failed because of a related-key attack is Wired Equivalent Privacy (WEP) used in WiFi wireless networks. Each client Wi-Fi network adapter and wireless access point in a WEP-protected network shares the same WEP key. Encryption uses the RC4 algorithm, a stream cipher. It is essential that the same key never be used twice with a stream cipher. To prevent this from happening, WEP includes a 24-bit initialization vector (IV) in each message packet. The RC4 key for that packet is the IV concatenated with the WEP key. WEP keys have to be changed manually and this typically happens infrequently. An attacker therefore can assume that all the keys used to encrypt packets share a single WEP key. This fact opened up WEP to a series of attacks which proved devastating. The simplest to understand uses the fact that the 24-bit IV only allows a little under 17 million possibilities. Because of the birthday paradox, it is likely that for every 4096 packets, two will share the same IV and hence the same RC4 key, allowing the packets to be attacked. More devastating attacks take advantage of certain weak keys in RC4 and eventually allow the WEP key itself to be recovered. In 2005, agents from the U.S. Federal Bureau of Investigation publicly demonstrated the ability to do this with widely available software tools in about three minutes. One approach to preventing related-key attacks is to design protocols and applications so that encryption keys will never have a simple relationship with each other. For example, each encryption key can be generated from the underlying key material using a cryptographic hash function or other key derivation function. For example, a replacement for WEP, Wi-Fi Protected Access (WPA), uses three levels of keys: master key, working key and RC4 key. The master WPA key is shared with each client and access point and is used in a protocol called TKIP to create new working keys frequently enough to thwart known attack methods. The working keys are then combined with a longer, 48-bit IV to form the RC4 key for each packet. This design mimics the WEP approach enough to allow WPA to be used with first-generation Wi-Fi network cards, some of which implemented portions of WEP in hardware. However, not all first-generation access points can run WPA. Another, more conservative approach is to employ a cipher designed to prevent related-key attacks altogether, usually by incorporating a strong key schedule. A newer version of Wi-Fi Protected Access, WPA2, uses the AES block cipher instead of RC4, in part for this reason. There are related-key attacks against AES, but unlike those against RC4, they're far from practical to implement, and WPA2's key generation functions may provide some security against them. Many older network cards cannot run WPA2.
Views: 115 The Audiopedia
What is PIGGY BANK CRYPTOGRAPHY? What does PIGGY BANK CRYPTOGRAPHY mean?
 
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What is PIGGY BANK CRYPTOGRAPHY? What does PIGGY BANK CRYPTOGRAPHY mean? PIGGY BANK CRYPTOGRAPHY meaning - PIGGY BANK CRYPTOGRAPHY definition - PIGGY BANK 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 Piggy bank cryptography is a digital emulation of a piggy bank. It uses an encrypted message as a carrier into which valuable secrets can be inserted and later recovered by the person who issued the message. A typical protocol works as follows: Bob, who wishes to obtain secret information from Alice, uses public key cryptography to encrypt some random data with his own public key. He sends the result to Alice. Alice creates a single-use key pair. She injects both her secret and her new decryption key into Bob's message. She then writes a signed note that describes what she has injected. She encrypts the note with her new encryption key, and sends the modified message and note to Bob. Bob decrypts the modified message to obtain both the secret and Alice's decryption key. He uses her decryption key to read the note and verify that Alice sent the secret. In this scheme, Bob does not necessarily require a public key from Alice, although he does require her to sign her note in such a way that he can verify her authorship. Piggy bank cryptography has been proposed for authenticating parties to detect man-in-the-middle attack. The piggy bank paradigm can be used to implement asymmetric as well as double-lock cryptography.
Views: 21 The Audiopedia
22. Cryptography: Encryption
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 15420 MIT OpenCourseWare
Theory and Practice of Cryptography
 
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Google Tech Talks November, 28 2007 Topics include: Introduction to Modern Cryptography, Using Cryptography in Practice and at Google, Proofs of Security and Security Definitions and A Special Topic in Cryptography This talk is one in a series hosted by Google University: Wednesdays, 11/28/07 - 12/19/07 from 1-2pm Speaker: Steve Weis Steve Weis received his PhD from the Cryptography and Information Security group at MIT, where he was advised by Ron Rivest. He is a member of Google's Applied Security (AppSec) team and is the technical lead for Google's internal cryptographic library, KeyMaster.
Views: 112088 GoogleTechTalks
What Is The Meaning Of Encryption?
 
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Encryption definition the tech terms computer dictionaryencrypt of encrypt in english what is encryption? Definition and meaning businessdictionary. See more 6 apr 2016 end to encryption is a secure method of communication where what it does mean that will be much difficult for whatsapp definition the process using an algorithm transform information make unreadable unauthorized users. Whatsapp end to encryption how it works and what means encrypted encryption? Internetassociation. This information provided about encryption meaning in hindi get and translation of language with grammar,antonyms is a means securing data using password (key) definition can be defined as the mechanism that aims to protect valuable information, such documents, pictures, or online transactions, from definition, encipher encode. Whatsapp adds end to encryption what is it and does encryption? Definition from techopedia. This includes files and storage devices, as well data transferred over wireless networks the internet in cryptography, encryption is process of encoding a message or information such way 'what does 'active defense' mean? 'retrieved meaning, pronunciation, example sentences, more from oxford dictionaries. Encryption? Definition from whatis searchsecurity 21 nov 2014 encryption is the conversion of electronic data into another form, called ciphertext, which cannot be easily understood by anyone except authorized parties encrypt meaning, definition, what to change information or signals a secret code ( system letters. A definition of data encryption. See more but what exactly does that mean, and importantly, in the world encryption do? Well, to start with, encrypting data is very important because it can encrypt definition if a document or piece of information encrypted, written special code, so. Encrypt meaning in the cambridge english dictionary. Encrypt meaning in hindi encrypt shabdkosh what is encryption? Webopedia definition. Encryption is the most effective way to achieve data security 12 apr 2016 here's what end encryption means and how it will work. Encryption? Definition from whatis searchsecurity. What is encryption? my ip address? Collins english dictionarydefinition of encrypt by merriam webster. Note that the ever changing message key can mean a delay in some encrypted definition, to encipher or encode. It is commonly used to protect sensitive information so that only authorized parties can view it. Meaning, pronunciation, translations and examples define encrypt to change (information) from one form another especially hide its meaning in a sentence 27 jan 2017 data encryption defined protection 101, our series on the fundamentals of security. All calls will be digitally encrypted to make eavesdropping impossible' definition of encryption scrambling sensitive information so that it becomes unreadable everyone except the intended recipient. Encryption meaning in hindi of encryption definition 'encryption' the economic timesdefine at dictionary
Views: 117 Aile Aile
What is NONREPUDIATION? What does NONREPUDIATION mean? NONREPUDIATION meaning & explanation
 
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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: 2745 The Audiopedia
Key Updating for Leakage Resiliency With Application to AES Modes of Operation
 
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Key Updating for Leakage Resiliency With Application to AES Modes of Operation To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83.Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai,Thattanchavady, Puducherry -9.Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690, Email: [email protected], web: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com Side-channel analysis (SCA) exploits the information leaked through unintentional outputs (e.g., power consumption) to reveal the secret key of cryptographic modules. The real threat of SCA lies in the ability to mount attacks over small parts of the key and to aggregate information over different encryptions. The threat of SCA can be thwarted by changing the secret key at every run. Indeed, many contributions in the domain of leakage resilient cryptography tried to achieve this goal. However, the proposed solutions were computationally intensive and were not designed to solve the problem of the current cryptographic schemes. In this paper, we propose a generic framework of lightweight key updating that can protect the current cryptographic standards and evaluate the minimum requirements for heuristic SCA-security. Then, we propose a complete solution to protect the implementation of any standard mode of Advanced Encryption Standard. Our solution maintains the same level of SCA-security (and sometimes better) as the state of the art, at a negligible area overhead while doubling the throughput of the best previous work.
Views: 368 jpinfotechprojects
Swipe lock Disabled by Administrator encryption policy or credential storage - How Fix-Bonus Android
 
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Do you like my works? Do you think I can be a part of your organization in someway? Does your organization require training or project delivery? Feel free to contact me at [email protected] Hello friends, I am Mohammed Shakeel and welcome to howENGINEERSdoit! YouTube channel, Here you can find technical videos related to CAD, especially CATIA, 3ds Max, AutoCAD, Marvelous Designer and also other cool technology videos like Android phone, laptop, desktop tips and tricks, troubleshoot videos, Google product tips and tricks etc Catia V5 is a Mechanical/Aerospace/Architectural/MEP/Electrical Design/Analysis software. There is a lot that you can do with this software. In this tutorial series, I will explain well in detail the important commands used to model different Mechanical/Aerospace/Product/Ship/Building Elements/Parts. It is used in major industries like Boeing,Airbus,Dassault Aviation, Eurofighter,BMW, Porsche, McLaren Automotive,Chrysler, Honda,United States Navy,Alstom Power,ABB Group,Michelin,Nikon,Nokia,Suzlon,Procter & Gamble. CATIA (an acronym of computer aided three-dimensional interactive application) (in English, usually pronounced multi-platform computer-aided design (CAD)/computer-aided manufacturing (CAM)/computer-aided engineering (CAE) software suite developed by the French company Dassault Systèmes. written C++ programming language. 3D Product Lifecycle Management software suite, CATIA supports multiple stages of product development (CAx),including conceptualization,design (CAD),engineering(CAE) manufacturing (CAM).CATIA facilitates collaborative engineering across disciplines around its 3DEXPERIENCE platform, including surfacing & shape design,electrical fluid & electronics systems design, mechanical engineering and systems engineering CATIA facilitates the design electronic,electrical,fluid HVAC systems,production of documentation manufacturing CATIA enables creation of 3D parts,from 3D sketches, sheetmetal,composites,molded,forged or tooling parts up to the definition of mechanical assemblies. The software provides advanced technologies mechanical surfacing & BIW It provides tools complete product definition, including functional tolerances as well as kinematics definition. CATIA provides wide range applications tooling design,for both generic tooling and mold & die CATIA offers a solution to shape design,styling surfacing workflow and visualization to create, modify, and validate complex innovative shapes from industrial design Class-A surfacing with the ICEM surfacing technologies.CATIA supports multiple stages of product design whether started from scratch or 2D sketches.CATIA v5 able read produce STEP format files for reverse engineering surface reuse. CATIA Systems Engineering solution delivers unique extensible systems engineering development platform that fully integrates the cross-discipline modeling, simulation, verification and business process support developing complex ‘cyber-physical’ products. enables organizations evaluate requests for changes or develop products system variants utilizing unified performance based systems engineering approach solution addresses the Model Based Systems Engineering (MBSE) users developing today’s smart products systems comprises the following elements: Requirements Engineering, Systems Architecture Modeling, Systems Behavior Modeling & Simulation, Configuration Management & Lifecycle Traceability Automotive Embedded Systems Development (AUTOSAR Builder) Industrial Automation Systems Development (ControlBuild) CATIA uses the open Modelica language both CATIA Dynamic Behavior Modeling Dymola engineering disciplines. CATIA & Dymola extended through domain specific Modelica libraries simulate wide range of complex systems automotive vehicle dynamics through to aircraft flight dynamics CATIA offers solution facilitate design manufacturing routed tubing,piping,Heating,Ventilating & Air Conditioning(HVAC).Capabilities 2D diagrams for defining hydraulic,pneumatic and HVAC systems used for the 787 series aircraft.Dassault Systèmes 3D PLM FNSS Vought Aircraft Industries Anglo/Italian Helicopter company AgustaWestland CATIA V4 V5 Safran use CATIA,Eurofighter Typhoon,main helicopters U.S Military forces,Sikorsky Aircraft Corp,P3 Voith,Bell Helicopter,Bell Boeing V-22 Osprey, has used CATIA V4,V5 V6,Dassault Aviation using CATIA currently working CATIA V6,BMW,Porsche, McLaren Automotive,Chrysler,Honda,Audi,Jaguar Land Rover,Volkswagen,SEAT,Škoda,Bentley Motors Limited,Volvo,Fiat,Benteler International,PSA Peugeot Citroën,Renault,Toyota, Ford,Scania, Hyundai,Tesla Motors,Rolls Royce Motors,Valmet Automotive,Proton,Elba,Tata motors Mahindra & Mahindra Limited
Views: 634936 howENGINEERSdoit!
Discrete Log Problem - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 12145 Udacity
Redesigning the way you interact with Encryption: Product Demo | ChatMail | PGP | ECC
 
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**View the latest version of ChatMail at https://youtu.be/kEXC6OJ6yko ChatMail 0.7.3 ChatMail provides an integrated end-to-end encrypted messaging protocol. ChatMail’s instant messages are encrypted with CAMP, a protocol that ChatMail custom developed inspired by the world’s leading cryptographers. CAMP stands for "ChatMail Advanced Messaging and Parsing Protocol" CAMP encompasses both our PGP and Elliptical Curve Cryptography. Key Exchange utilizes the Double Ratchet Algorithm which combines the cryptographic ratchet based on the Diffie–Hellman key exchange and a ratchet based on the the key derivation function. • DH Ratchet: Elliptic curve Diffie–Hellman (ECDH) with Curve25519 • Message Authentication Codes: HMAC based on SHA256 • Symmetric Encryption: Advanced Encrypted Standard (AES-256) in Counter Mode (CTR) • Hash Ratchet: HMAC • Identity Verification: Automatic verification is done with your public identity key.
Views: 519 ChatMail
What Is DSA Algorithm?
 
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Digital signature algorithm (zkrcen dsa, doslovn peloeno z anglitiny algoritmus digitlnho podpisu) je standard americk vldy pro digitln podpis the digital (dsa) is a federal information processing for signatures. Digital signature algorithm wikipedie cs. If interested in the elliptic curve variant, dsa is an algorithm for asymmetric key cryptography, defined as a united states federal government standard digital signatures dsa, signature asymetrick ifrovac algoritmus pouvan hlavn pro digitln podpisy. Dsa digital signature algorithm vocal technologies. This section describes the dsa (digital signature algorithm) algorithm, which consists of 2 parts generation a pair public key and private key; Generation vocal's digital algorithm is available with wide range cryptographic solutions in both hardware software form factors (dsa) refers to standard for signatures. B to the k power g, with a couple of other helpful hints (you 25 aug 2013 public key cryptography using discrete logarithms. Digital signature algorithm crypto wiki cryptopp. Digital signature algorithm (dsa) uniface fo. Encryption) 15 may 2010 and see 'what is better for gpg keys rsa or dsa? Dsa a variant on the elgamal schnorr algorithms creates 320 bit signature, 11 2012 dsa stands 'digital signature algorithm' specifically designed to produce digital signatures, not perform encryption crypto algorithm ('encryption key') ('decryption based discrete logarithms i. Chapter 5 gives a final digital signature algorithm (dsa) the dsa was developed by national institute for standards and testing (nist) security p dss standardand michael pace in this paper i will discuss standard (dss) data structures algorithms tutorial beginners learn using c, c java simple easy steps starting from 19 nov 2015 is. Dsa is one of three signature schemes specified in fips 186. Encryption what is the difference between dsa and rsa? Stack rsa why can't be used for encryption? Cryptography stack quora. Part 4 digital signature algorithm (dsa) Digital wikipediedigital wikipedia. Digital signature algorithm (dsa) di management. Googleusercontent search. In august 1991 the national institute of standards and 3leden 2016. Digital signature algorithm wikipedie. What is a digital signature algorithm (dsa)? Definition from what standard (dss)? whatis the (dsa) johannes buchmann network security with dss and dsa. What is dsa algorithm? Youtubewhat (digital signature algorithm)? Herong yang. Wikipedia wiki digital_signature_algorithm url? Q webcache. It was introduced in 1991 by the national institute of standards and technology digital signature standard (dss) is algorithm (dsa) developed u. National security agency (nsa) to generate a digital signatur
Views: 220 Hadassah Hartman
Understand the Blockchain in Two Minutes
 
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Over the past decade, an alternative digital paradigm has slowly been taking shape at the edges of the internet. This new paradigm is the blockchain. After incubating through millions of Bitcoin transactions and a host of developer projects, it is now on the tips of tongues of CEOs and CTOs, startup entrepreneurs, and even governance activists. Though these stakeholders are beginning to understand the disruptive potential of blockchain technology and are experimenting with its most promising applications, few have asked a more fundamental question: What will a world driven by blockchains look like a decade from now? Learn more: http://www.iftf.org/blockchainfutureslab Contact us: http://www.iftf.org/blockchainfutureslab/contact
Hash Functions
 
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0:00-4:15 - A conceptual overview of hash functions and their requirements. 4:15-end - Hash functions in digital signatures use. For review on how RSA signatures work, see: https://www.youtube.com/watch?v=DIfOvWymmP0 Questions? Feel free to post them in the comments and I'll do my best to answer!
Views: 17238 Theoretically
Hashing | Set 3 (Open Addressing) | GeeksforGeeks
 
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Explanation for the article: http://quiz.geeksforgeeks.org/hashing-set-3-open-addressing/ This video is contributed by Illuminati.
Views: 49982 GeeksforGeeks
PGP Encryption Tutorial Part 2: Decryption
 
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Short tutorial that shows a very simple method for decrypting encrypted messages that have been sent to you using Kleopatra. Enjoy! Previous tutorial: https://www.youtube.com/watch?v=U33TbfZInEI ***PLEASE NOTE: If you want to be able to decrypt messages from any computer, you need to export YOUR PGP key pair (meaning both public and private) to somewhere you can access them from any computer, like a flash drive or cloud storage.
Views: 51885 Kevin Cronly
Your Family Tree Explained
 
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Discuss this video: http://www.reddit.com/r/CGPGrey/comments/27a9yn/your_family_tree_explained/ Family chart: http://www.cgpgrey.com/blog/family-tree Footnote * https://www.youtube.com/watch?v=U6ViKuXd5qQ Support: https://subbable.com/cgpgrey/ Website: http://www.cgpgrey.com/ Special thanks: Shaun May Gustavo Maronato Ryan Hendry Dawid van Zyl Tom Bradley Amit Shankar Sander Groenendijk Gabriela Cervantes Celhay Wes Bandemer Michael Head Jordan Smith Ben Smith Andrew Escobar Navarr Barnier
Views: 3290040 CGP Grey
Block Cipher Modes of Operation | ECB mode | Mode of operation of block cipher | Part 1 | Hindi Urdu
 
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#askfaizan | #syedfaizanahmad Block Cipher Modes of Operation | CBC mode | Part 2 https://youtu.be/Q7LKmASkVSU Hill Cipher | Complete Algorithm with Example https://youtu.be/B0Q7w7Fd7ms Playfair Substitution Cipher https://youtu.be/w_xr7pj-O6c Monoalphabetic Substitution Cipher https://youtu.be/Hw1T7GOnVW0 Caesar Cipher | Caesar Substitution Cipher https://youtu.be/2N9GlhysYJw PlayList : Cryptography and Network Security : https://www.youtube.com/playlist?list=PLhwpdymnbXz7hvvqhqjIIG4tEdhAgQqll Block cipher processes the data blocks of fixed size If size of message is larger than block size. Then, the message is divided into a series of sequential message blocks. Multiple blocks of plaintext are encrypted using the same key, security issues arise. To apply a block cipher in a variety of applications, five modes of operation have been defined by NIST 1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode The simplest mode is the electronic codebook (ECB) mode Plaintext is handled one block at a time Each block of plaintext is encrypted using the same key The ECB mode is deterministic If plaintext block P1, P2,…, Pm are encrypted twice under the same key, the output ciphertext blocks will be the same. CBC is technique in which the same plaintext block, if repeated, produces different ciphertext blocks Each plaintext block is XORed with the ciphertext block that was previously produced To produce the first block of ciphertext, an initialization vector (IV) is XORed with the first block of plaintext For decryption, IV data is XORed with first ciphertext block decrypted.
Views: 206 Ask Faizan
Chapter 2, part 6: Crypto Basics --- crypto history, Claude Shannon
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 2: Crypto Basics Section 2.4 crypto history, Claude Shannon Class Lecture, 2011
Views: 3323 Mark Stamp
Polygraphic Part 2 - Hill Ciphers Examples/Encryption/Decryption
 
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A beginner's guide to Polygraphic Ciphers, Part 2. (Hill Ciphers Examples/Encryption/Decryption)
Views: 99969 Daniel Rees
Differential Cryptanalysis
 
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Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 13610 nptelhrd
How Bitcoin Works Under the Hood
 
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A somewhat technical explanation of how Bitcoin works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Shorter 5 min introduction: https://www.youtube.com/watch?v=t5JGQXCTe3c Written version: http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html My Bitcoin address: 13v8NB9ScRa21JDi86GmnZ5d8Z4CjhZMEd Arabic translation by Ahmad Alloush Spanish caption translation by Borja Rodrigo, [email protected], DFJWgXdBCoQqo4noF4fyVhVp8R6V62XdJx Russian caption translation by Alexandra Miklyukova Italian voice over: http://youtu.be/1aEf3qr7UdE Italian captions translated by Simone Falcini, 1H5KdCnBooxfqpXtyQBBAKKRU7MkCZCVCe
Views: 2618555 CuriousInventor
Applied Cryptography: The Permutation Cipher
 
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Previos video: https://youtu.be/nQGh3e_Wa4A Next video: https://youtu.be/BmK2wBMc1mA
Views: 5737 Leandro Junes
Bitcoin 101 - Elliptic Curve Cryptography - Part 4 - Generating the Public Key (in Python)
 
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Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you. This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy. Here's the link to our Python code (Python 2.7.6): https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py Here's the private key and the link to the public address that we use. Do you know why it is famous? Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E Public Address on Blockchain.info https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW Here's the private key we use at the end: 42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB Public Address on Blockchain.info https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe. Thanks, WBN
Views: 20777 CRI
Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English
 
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Hashing Techniques Hash Function, Types of Hashing Techniques in Hindi and English * Direct Hashing * Modulo-Division Hashing * Mid-Square Hashing * Folding Hashing - Fold-Shift Hashing and Fold Boundary Hashing * PseudoRandom Hashing * Subtraction Hashing For Students of B.Tech, B.E, MCA, BCA, B.Sc., M.Sc., Courses - As Per IP University Syllabus and Other Engineering Courses
Views: 170918 Easy Engineering Classes
Vernam Cipher explained step by step !!!
 
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In this video I have explained what vernam cipher is with the help of example.....if you want to understand clearly watch this video upto end..... Please...Like, share and comment if you really gained something from this video...and yes...don't forget to subscribe! Your support really encourages me to do better....Thank you!! :)
Views: 3362 Nimish Munishwar
Learning Symmetric Cryptography:  Transposition Cipher
 
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You can find the entire course here: https://goo.gl/kXwkz6 Learning Symmetric Cryptography: Transposition Cipher In this video Tripti Tanvi has explained the Transposition Cipher. Also, learn rail fence, simple columnar and complex transposition techniques. Download the Unacademy Learning App from the Google Play Store here:- https://goo.gl/02OhYI Download the Unacademy Educator app from the Google Play Store here: https://goo.gl/H4LGHE Do Subscribe and be a part of the community for more such lessons here: https://goo.gl/UGFo7b For more awesome courses on engineering visit: Visit Our Facebook Group on Engineering Curriculum here: https://goo.gl/5EqfqS
How to Use the Keyword Cipher
 
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This video explains how to use my Keyword Cipher tool.
Views: 2724 Brian Veitch

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