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NETWORK SECURITY - PUBLIC KEY DISTRIBUTION
 
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There are four ways to distribute the public keys among the users. 1) Public Announcement 2) Public Key Directory 3) Public Key Authority 4) Certificate Authority
Key Management.
 
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Views: 2287 Internetwork Security
Secret Key Distribution with Public Key Crypto (CSS322, L23, Y14)
 
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Using public key crypto to exchange secret keys. Man-in-the-middle attack on public keys; Public key distribution with authorities. Course material via: http://sandilands.info/sgordon/teaching
Views: 3192 Steven Gordon
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: 417736 itfreetraining
The BEST Way to Secure your Private Keys
 
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👍Thank you so much for watching! 😃Please Like, subscribe and turn on those channel notifications! 🌐Follow on Twitter @cryptocaffeine Support the channel! 💎Become a Patron or Sponsor | https://www.patreon.com/cryptosandcaffeine 💎Donate Bitcoin | 1BSBY8UcmvJMwHdfSbw8C756WXrDA2gi1t 💎Donate Litecoin | LZQK2VwV6YDj7fSUHcYefZBrkcFqgb17ii 💎Donate Ethereum | 0xcb34572fEa5C29119983D749744E0b8498561BF3 💎Donate IOTA | VDEINPV9HW9T9WBUVCTGLUMBRAOJL9ZJJYHAKFWFRXAUHEPWBDWROIMHANLSZCDSGYMMCGRYVZQPAHM9XYLHWUEOQX 🎯Sources ☑http://www.nifast.org/blog/07/do-you-know-what-will-not-burn-in-a-house-fire/ ☑http://www.engineeringtoolbox.com/melting-temperature-metals-d_860.html ☑https://www.dogtagus.com/Dog_Tags.html
Views: 710 Cryptos & Caffeine
Authentication with Symmetric Key Crypto and MACs (CSS322, L17, Y14)
 
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Introduction to authentication. Authentication with symmetric key encryption. Authentication with Message Authentication Codes. Course material via: http://sandilands.info/sgordon/teaching
Views: 1063 Steven Gordon
symmetric key cryptography
 
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https://8gwifi.org/CipherFunctions.jsp Reference book: http://leanpub.com/crypto Cryptographic Algorithms generally fall into one of two different categories, or are a combination of both. Symmetric Fast Only provide confidentiality Examples: DES, AES, Blowfish, RC4, RC5 Asymmetric Large mathematical operations make it slower than symmetric algorithms No need for out of band key distribution (public keys are public!) Scales better since only a single key pair needed per individual Can provide authentication and nonrepudiation Examples: RSA, El Gamal, ECC, Diffie-Hellman problem with symmetric key cryptography DES (Data Encryption Standard) 64 bit key that is effectively 56 bits in strength Actual algorithm is called DEA (Data Encryption Algorithm) DES Modes Electronic Code Book Cipher Block Chaining (most commonly used for general purpose encryption) Cipher Feedback Output Feedback Counter Mode (used in IPSec) 3DES 112-bit effective key length Uses either 2 or 3 different smaller keys in one of several modes Modes EEE2/3 EDE2/3 AES NIST replaced DES in 1997 with this Uses the Rijndael algorithm Supports key/block sizes of 128, 192, and 256 bits Uses 10/12/14 rounds as block size increases IDEA (International Data Encryption Algorithm) Operates on 64 bit blocks in 8 rounds with 128 bit key Considered stronger than DES and is used in PGP Blowfish 64 bit block cipher with up to 448 bit key and 16 rounds Designed by Bruce Schneier RC4 Stream cipher with variable key size created by Ron Rivest RC5 Another Rivest cipher Block cipher with 32/64/128 bit blocks and keys up to 2048 bits RC6 Beefier version of RC5 submitted as AES candidate CAST 64 bit block cipher with keys between 40-128 bits with 12-16 rounds depending on key length CAST-256 used 128-bit blocks and keys from 128-256 bits using 48 rounds SAFER (Secure and Fast Encryption Routine) Set of patent-free algorithms in 64 and 128 bit block variants Variation used in Bluetooth Twofish Adapted version of Blowfish with 128 bit blocks, 128-256 bit keys and 16 rounds AES Finalist Kryptografie mit symmetrischem Schlüssel symmetric key cryptography symmetric key cryptography tutorial symmetric key cryptography example symmetric key cryptography vs asymmetric key cryptography symmetric and asymmetric key cryptography symmetric key cryptography Kryptografie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptografie mit symmetrischem Schlüssel und asymmetrische Schlüsselkryptographie symmetrische und asymmetrische Schlüsselkryptographie Kryptografie mit symmetrischem Schlüssel
Views: 37548 Zariga Tongy
Intro to Asymmetric Key Cryptography
 
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This video is part of a larger online course, "From Barter to Bitcoin: Society, Technology and the Future of Money" run by Prof. Bill Maurer and Prof. Donald J. Patterson In addition to the video on YouTube there is a variety of other content available to students enrolled in the class. "In 2008, a person calling himself or herself or themselves Satoshi Nakamoto released a paper suggesting a system for an anonymous, peer-to-peer alternative money. Bitcoin was born. Although not the first digital currency ever proposed, nor the first challenger to fiat money, bitcoin is the first to have captured the broad imagination of speculators, coders, regulators, criminals and the mass media. This course puts Bitcoin in context: how do we understand money as a social, political and technological phenomenon? From discussions of ancient transactions to the rise of state-issued currencies, we will explore the social and technical aspects of bitcoin, its predecessors and potential successors, and how its features echo aspects of many different historical transaction systems. No prior knowledge of economics or computing is required. There is little academic writing on bitcoin. And this may be the first truly academic class on the topic. We want to put bitcoin in a wider perspective, to reflect on what it means for society, politics and economics, as well as how it helps us think about money both a social and a technical phenomenon. This class is not an advanced seminar on bitcoin--we will not be delving deeply into the inner workings of the system, but instead providing a bird's-eye overview with enough technical detail for you to be able to put media stories, hype and hope around bitcoin in perspective. Similarly, this is not a class in monetary economics--we won't go too deeply into monetary theory or policy, the money supply, or inflation. Instead the class invites you to think more deeply about one of the oldest systems of technology on the planet, and most ubiquitous: money, whether coin, cash, credit card or cryptocurrency, we humans have been making money for most of the past 10,000 years. How we do so in the future is a question bitcoin just maybe helps us answer."
Views: 39132 djp3
Symmetric and Asymmetric Encryption Overview (Private Public Keys)
 
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http://zerotoprotraining.com This video provides and overview of Symmetric and Asymmetric Encryptions including the concepts of public and private keys (PKI)
Views: 102171 HandsonERP
What is Public Key Infrastructure (PKI) by SecureMetric
 
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This video explains to you how PKI works to create a secure environment.
Views: 67390 SecureMetric
2.4.1 RSA Public Key Encryption: Video
 
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MIT 6.042J Mathematics for Computer Science, Spring 2015 View the complete course: http://ocw.mit.edu/6-042JS15 Instructor: Albert R. Meyer License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 14837 MIT OpenCourseWare
Public Key Cryptography and RSA (CSS322, Lecture 10, 2013)
 
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CSS322 Security and Cryptography at Sirindhorn International Institute of Technology, Thammasat University. Given on 24 December 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Course material via: http://sandilands.info/sgordon/teaching
Views: 1031 Steven Gordon
Number Theory 4  Intro to Encryption
 
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Part 3: Introduction to codes and an example or RSA public key encryption.
SSL Certificate Explained
 
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Views: 796495 dtommy1979
Digital Signature - Asymmetric Key , Why used for Authentication & Non Repudiation (Hindi)
 
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Digital Signature - Asymmetric Key Cryptography, Why used for Authentication and Non Repudiation (Hindi) Keywords: Digital Signature Asymmetric Encryption Authentication Non Repudiation
Distribute Secret Keys with KDC (CSS322, L22, Y14)
 
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Using Key Distribution Centre to distribute secret keys. Course material via: http://sandilands.info/sgordon/teaching
Views: 1865 Steven Gordon
IMA Public Lectures : Secrecy, privacy, and deception: the mathematics of cryptography; Jill Pipher
 
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Institute for Mathematics and its Applications (IMA) Public Lecture Series http://www.ima.umn.edu/public-lecture/ Secrecy, privacy, and deception: the mathematics of cryptography 7:00P.M., Wednesday, March 9, 2011, 2011, Willey Hall 175 Jill Pipher (Mathematics Department, Brown University) Every time we go on-line to look up something or to make a purchase, we are exposing ourselves to a certain amount of risk. We risk having our identities hijacked and our private information exploited. How do we protect networks against intruders and keep information safe? We do this with cryptography. This lecture will tour the mathematical ideas behind encryption, public key encryption, digital signatures, and authentication.
Views: 816 IMA UMN
Public & Private Keys Explained (Litecoin/Bitcoin)
 
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By now you have most probably already heard of the term Public & Private keys, but what exactly are they and more to the point what do they even do? Note, 204 Tresvigintillion is the amount of time a standard desktop PC would take to crack a key - via Howseucreismypassword.net Bloomberg Video: http://www.bloomberg.com/news/videos/b/9a33c478-516f-4fc9-8a11-0e9cb7c5b066) 🎧 Music: ♪ Kontinuum - Aware ♪ L'impératrice - Vanille Fraise
Views: 75573 Franklyn [Litecoin]
How asymmetric (public key) encryption works
 
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Easy explanation of "public key encryption". Instead of the usual terms of "public key" and "private key" this tutorial uses "lock" and "key". ================================================== If you want to start protecting you email: get free Privacy Everywhere Beta, http://www.privacyeverywhere.net/
Views: 196279 Veet Vivarto
Encryption and HUGE numbers - Numberphile
 
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Banks, Facebook, Twitter and Google use epic numbers - based on prime factors - to keep our Internet secrets. This is RSA public-key encryption. More links & stuff in full description below ↓↓↓ Gold Vault: https://youtu.be/CTtf5s2HFkA This video features Dr James Grime (http://singingbanana.com/). Message from James: "Thanks to Dr Chris Hughes of the University of York who showed me how to find the RSA public key from my browser, and showed me how awesome they look when you print them out." Regarding the keys used for encryption: x, y prime Encode key E shares no factors with (x-1)(y-1) Decode key is D with E*D - 1 a multiple of (x-1)(y-1) Thanks to Drew Mokris for the animation: http://www.spinnerdisc.com/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile Other merchandise: https://store.dftba.com/collections/numberphile
Views: 985431 Numberphile
Private and Public Key Encryption
 
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Asymmetric Encryption A common craft video I made for my ITGS lesson.
Views: 77209 Nihal Acar
How does public key cryptography work – Gary explains
 
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How keys are distributed is vital to any encryption system. Find out how to do it with the Diffie–Hellman key exchange and using public-key cryptography. Find out more: https://goo.gl/qI6jxZ Download the AndroidAuthority App: https://play.google.com/store/apps/details?id=com.androidauthority.app Subscribe to our YouTube channel: http://www.youtube.com/subscription_center?add_user=androidauthority ---------------------------------------------------- Stay connected to Android Authority: - http://www.androidauthority.com - http://google.com/+androidauthority - http://facebook.com/androidauthority/ - http://twitter.com/androidauth/ - http://instagram.com/androidauthority/ Follow the Team: Josh Vergara: https://plus.google.com/+JoshuaVergara Joe Hindy: https://plus.google.com/+JosephHindy Lanh Nguyen: https://plus.google.com/+LanhNguyenFilms Jayce Broda: https://plus.google.com/+JayceBroda Gary Sims: https://plus.google.com/+GarySims Kris Carlon: http://plus.google.com/+KrisCarlon Nirave Gondhia: http://plus.google.com/+NiraveG John Velasco: http://plus.google.com/+JohnVelasco Bailey Stein: http://plus.google.com/+BaileyStein1
Views: 36455 Android Authority
Diffie-Hellman Key Exchange | Jean Goubault-Larrecq
 
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In communications security, the Diffie-Hellman key exchange, which is the topic of this lesson, is a widely used method for creating symmetric keys. Speaker: Jean GOUBAULT-LARRECQ Editor: El Mahdi EL MHAMDI
Views: 778 Wandida, EPFL
Public Key Cryptography - RSA Encryption Algorithm | El Mahdi El Mhamdi
 
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to react on this video or ask questions: http://wandida.com/en/archives/804 Safely encrypting while publishing a key visible to the public might sound non-intuitive, in this video the principle of public key encryption is exposed. Explanation: El Mahdi EL MHAMDI.
Views: 1428 Wandida, EPFL
Cryptography Lecture-3 RSA,AES,DES ALGORITHM - CBSE NET
 
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Crypography Algorithm helps in making our data secure while transmitting on internet. To do that we can follow number of method. 1. Symmetric key or Secret key DES: Data encryption standard Triple DES AES: Advanced encryption standard 2. Asymmetric key or public key RSA : Divest Shamir and Adleman Duffie- Hellman Solved example: UGC NET July 2013 exam questions
Encrypted Key Exchange - 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: 2956 Udacity
How Internet Encryption Works - Diffie Hellman Public Key Cryptography
 
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In this video, we learn how internet encryption works to secure your data. Diffie Hellman is the most popular form of internet encryption. It allows two or more parties to exchange information securely. We look at how it works, in general, and then we look at the specific equations that are behind it. We also discuss downfalls with Diffie Hellman, which now requires 2048 bit keys, and the potential for Elliptic Curve Cryptography. For all your Global IT Security Needs, in Edmonton, AB and around the world: Call us 24/7 at 1 866 716 8955 / 780 628 1816 Visit us at https://www.hsmitservices.com/network-security We'll take care of you!
Views: 257 HSM IT Services
Private/Public Key Cryptography
 
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A PSA on Private/Public Key Cryptography.
Views: 188 Dave
Public Key Infrastructure Fundamentals - Bart Preneel
 
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The function of a public key infrastructure (PKI) is to ensure secure delivery and management of public keys. Alternative trust models lead to different key architectures. Public keys are published by means of digitally signed certificates. A private key may be compromised, in which case the certificate containing the corresponding public key must be revoked. Many revocation methods are in current use. Publication of Certificate Revocation Lists (CRLs) and checking with an Online Certificate Status Protocol (OCSP) responder are best established. Learning objectives + learn the components of a public key infrastructure. + understand key delivery and management mechanisms. A lecture by Bart Preneel at SecAppDev 2013 in Leuven, Belgium. Professor Bart Preneel of KU Leuven heads the COSIC (COmputer Security and Industrial Cryptography) research group. His main research area is information security with a focus on cryptographic algorithms and protocols as well as their applications to both computer and network security, and mobile communications. He teaches cryptology, network security and coding theory at the K.U.Leuven and was visiting professor at the Ruhr Universitaet Bochum (Germany), the T.U.Graz (Austria), the University of Bergen (Norway), and the Universiteit Gent (Belgium). In '93-'94 he was a research fellow at the University of California at Berkeley. He has taught intensive courses around the world. He undertakes industrial consulting (Mastercard International, S.W.I.F.T., Proton World International,...), and participates in the work of ISO/IEC JTC1/SC27/WG2. Professor Preneel is Vice President of the International Association for Cryptologic Research (IACR) and co-founder and chairman of LSEC vzw (Leuven Security Excellence Consortium).
Views: 50220 secappdev.org
[Hindi] What is Cryptography ? | Kya hai cryptography ? | Explained in simple words
 
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Hello Dosto Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare. Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love #TechnicalSagar LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- For all updates : SUBSCRIBE Us on Technical Sagar : www.youtube.com/technicalsagarindia LIKE us on Facebook https://www.facebook.com/technicalsagarindia Follow us on Twitter : http://www.twitter.com/iamasagar
Views: 73863 Technical Sagar
What is public-key cryptography?
 
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The presentation portion only, as seen in my other video, http://youtu.be/ejppVhOSUmA?hd=1
Views: 1433 xkiller213
what is cryptography and network security
 
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It is a mono-alphabetic cipher wherein each letter of the plaintext is substituted by another letter to form the ciphertext. It is a simplest form of substitution cipher scheme Modern cryptography uses sophisticated mathematical equations (algorithms) and secret keys to encrypt and decrypt data. Today, cryptography is used to provide secrecy and integrity to our data, and both authentication and anonymity to our communications. Network security attacks and services https://youtu.be/-ZHWhaLInik What is network security explained in minutes https://youtu.be/vqavFou2oxk Predefined functions in PHP https://youtu.be/ewmWqm2H-AA Cryptography or cryptology (from Greek κρυπτός kryptós, "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively[1]) is the practice and study of techniques for secure communication in the presence of third parties called adversaries.[2] More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages;[3] various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation[4] are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synonymous with encryption, the conversion of information from a readable state to apparent nonsense. The originator of an encrypted message shared the decoding technique needed to recover the original information only with intended recipients, thereby precluding unwanted persons from doing the same. The cryptography literature often uses the name Alice ("A") for the sender, Bob ("B") for the intended recipient, and Eve ("eavesdropper") for the adversary.[5] Since the development of rotor cipher machines in World War I and the advent of computers in World War II, the methods used to carry out cryptology have become increasingly complex and its application more widespread. Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means. These schemes are therefore termed computationally secure; theoretical advances, e.g., improvements in integer factorization algorithms, and faster computing technology require these solutions to be continually adapted. There exist information-theoretically secure schemes that probably cannot be broken even with unlimited computing power—an example is the one-time pad—but these schemes are more difficult to implement than the best theoretically breakable but computationally secure mechanisms. The growth of cryptographic technology has raised a number of legal issues in the information age. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export.[6] In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation.[7][8] Cryptography also plays a major role in digital rights management and copyright infringement of digital media.[9] -~-~~-~~~-~~-~- interview question and answers https://www.youtube.com/watch?v=8dhBq_elHg8 interview question and answers https://www.youtube.com/watch?v=pC1mVWj9iq8&t=9s interview question and answers https://www.youtube.com/watch?v=3WuliE8Jmt0&t=6s interview question and answers https://www.youtube.com/channel/UCyNJURC5bvqIQ9vO9PBrYrA/videos?view_as=subscriber interview question and answers https://www.youtube.com/watch?v=6Z5OzXzQqUM&t=5s interview question and answers https://www.youtube.com/watch?v=Max8PhFkWtg&t=4s interview question and answers https://www.youtube.com/watch?v=Xd7Yk4vEpuo&t=7s interview question and answers https://www.youtube.com/watch?v=yc3V4pXPEpk Please watch: "Html interview questions and answers for freshers" https://www.youtube.com/watch?v=8dhBq_elHg8 -~-~~-~~~-~~-~-
Views: 199 Computer Study
Public Key Distribution for RSA Algo.
 
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Public Key Distribution for RSA Algo.
Understanding Cryptographic Key Strength
 
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Understanding Cryptographic Key Strength in less than 10 minutes - this short visual explanation describes the difference between 56-bit, 128-bit and 256-bit keys and illustrates how difficult it is to attack these keys - even with a quantum computer. Presented by Terence Spies, CTO of Voltage Security, voltage.com
Views: 6651 VoltageOne
Key Distribution Centre (CSS441, L20, Y15)
 
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Symmetric key distribution using a Key Distribution Centre; attacks on a KDC. Course material via: http://sandilands.info/sgordon/teaching
Views: 3616 Steven Gordon
RSA ASYMMETRIC KEY CRYPTOGRAPHY IN HINDI
 
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RSA ASYMMETRIC KEY CRYPTOGRAPHY IN HINDI
Views: 327 LearnEveryone
633 PKI Assignment help (Crypto Lab – Public-Key Cryptography and PKI)
 
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Extract public key for verification: http://stackoverflow.com/questions/10271197/openssl-how-to-extract-public-key Verify sign : https://raymii.org/s/tutorials/Sign_and_verify_text_files_to_public_keys_via_the_OpenSSL_Command_Line.html Encrpytion : http://askubuntu.com/questions/60712/how-do-i-quickly-encrypt-a-file-with-aes Measure time ; http://askubuntu.com/questions/53444/how-can-i-measure-the-execution-time-of-a-terminal-process Cpp files : (openssl sample code) http://www.cis.syr.edu/~wedu/seed/Labs_12.04/Crypto/Crypto_PublicKey/
Views: 2477 Jae duk Seo
Public Key Crypto and Digital Signatures (ITS335, Lecture 6, 2013)
 
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Public key cryptography and digital signatures. Lecture 6 of ITS335 IT Security at Sirindhorn International Institute of Technology, Thammasat University. Given on 28 November 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Course material via: http://sandilands.info/sgordon/teaching
Views: 1946 Steven Gordon
How does public key encryption work - simplified (AKIO TV)
 
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This is a basic explanation of public key encryption. Public key encryption allows for secure communication over the internet, which is why it's so extremely important these days. I hope you enjoy watching this video!! (AKIO TV) MMXVII
Views: 3928 AKIO TV
Chocolate Key Cryptography: Delicious Way to Send Messages
 
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Mathematics and chocolate: what a combination!
Views: 3091 ResearchChannel
What is KEY DISTRIBUTION? What does KEY DISTRIBUTION mean? KEY DISTRIBUTION meaning & explanation
 
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What is KEY DISTRIBUTION? What does KEY DISTRIBUTION mean? KEY DISTRIBUTION meaning - KEY DISTRIBUTION definition - KEY DISTRIBUTION 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 symmetric key cryptography, both parties must possess a secret key which they must exchange prior to using any encryption. Distribution of secret keys has been problematic until recently, because it involved face-to-face meeting, use of a trusted courier, or sending the key through an existing encryption channel. The first two are often impractical and always unsafe, while the third depends on the security of a previous key exchange. In public key cryptography, the key distribution of public keys is done through public key servers. When a person creates a key-pair, they keep one key private and the other, known as the public-key, is uploaded to a server where it can be accessed by anyone to send the user a private, encrypted, message. Secure Sockets Layer (SSL) uses Diffie–Hellman key exchange if the client does not have a public-private key pair and a published certificate in the public key infrastructure, and Public Key Cryptography if the user does have both the keys and the credential. Key distribution is an important issue in wireless sensor network (WSN) design. There are many key distribution schemes in the literature that are designed to maintain an easy and at the same time secure communication among sensor nodes. The most accepted method of key distribution in WSNs is key predistribution, where secret keys are placed in sensor nodes before deployment. When the nodes are deployed over the target area, the secret keys are used to create the network. For more info see: key distribution in wireless sensor networks. Key distribution and key storage are more problematic in the cloud due to the transitory nature of the agents on it. Secret sharing can be used to store keys at many different servers on the cloud. In secret sharing, a secret is used as a seed to generate a number of distinct secrets, and the pieces are distributed so that some subset of the recipients can jointly authenticate themselves and use the secret information without learning what it is. But rather than store files on different servers, the key is parceled out and its secret shares stored at multiple locations in a manner that a subset of the shares can regenerate the key. Secret sharing is used in cases where one wishes to distribute a secret among N shares so that M N of them (M of N) can regenerate the original secret, but no smaller group up to M - 1 can do so.
Views: 41 The Audiopedia
Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example
 
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