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Search results “Quantum public key cryptosystems” for the 2013
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: 463631 itfreetraining
Other Public Key Cryptosystems: Part 2
 
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Fundamental concepts of Diffie-Hellman Key exchange are discussed. ElGamal Cryptosystem is presented. Elliptic curves are Analyzed.
Views: 443 Scholartica Channel
David Kahn on recent developments in cryptography and stealing code keys
 
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David Kahn, author of The Codebreakers - The Story of Secret Writing on: the lack of information on current codes; the tactical advantages from stealing code keys; Quantum cryptography; and the virtual unbreakability of one-time pad codes.
Views: 1813 SmartMonkeyTV
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: 204106 Veet Vivarto
Quantum Encryption Loopholes by ṤⱧǠᴆŐƜ
 
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Quantum Encryption Loopholes
Views: 1975 ṤⱧǠ ᴆŐƜ
Quantum Key Review
 
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http://www.ubermanbook.com - Can the secrets of the Quantum Key really change your life? This is one of the most popular self improvement / mind power guides available anywhere. Check it out!
Views: 7988 J M
The physics of cryptography - Renato Renner
 
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Renato Renner of ETH Zürich presented an invited talk: The physics of cryptography at the 2013 QCrypt Conference in August. http://2013.qcrypt.net Find out more about IQC! Website - https://uwaterloo.ca/institute-for-quantum-computing/ Facebook - https://www.facebook.com/QuantumIQC Twitter - https://twitter.com/QuantumIQC
:3rd BIU Winter School on Cryptography: Anonymous Credentials and eCash - Anna Lysyanskaya
 
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The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1065 barilanuniversity
3rd BIU Winter School on Cryptography:The Basics of Pairings - Dan Boneh
 
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The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 7817 barilanuniversity
Digital Signatures: Part 1
 
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Fundamental concepts of Digital Signatures are discussed. ElGamal and Schnorr Digital Signature schemes are analyzed. Digital signature standard is presented.
Views: 3809 Scholartica Channel
What is Encryption?
 
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Want to know how long it will take for one hundred thousand computers to crack one encryption key? Watch our video to find out! For more about encryption, visit cryptomill.com
05 Jeff Hoffstein on NTRU and Lattice-Based Signatures
 
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Jeff Hoffstein's August 13, 2013 lecture at the UCI Workshop on Lattices with Symmetry.
Developer's Guide to JavaScript and Web Cryptography
 
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The increasing capabilities and performance of the web platform allow for more feature-rich user experiences. How can JavaScript based applications utilize information security and cryptography principles? This session will explore the current state of JavaScript and Web Cryptography. We will review some basic concepts and definitions, discuss the role of TLS/SSL, show some working examples that apply cryptography to real-world use cases and take a peek at the upcoming W3C WebCryptoAPI. Code samples will use CryptoJS in the browser and the Node.js Crypto module on the server. An extended example will secure the popular TodoMVC project using PBKDF2 for key generation, HMAC for data integrity and AES for encryption. Slides available on Google Docs: https://docs.google.com/presentation/d/1Sx5ODjh_4lgfYgPNY3RqFzL4snvBbcGZ6byOn78K2ME/edit?usp=sharing
Views: 2965 Kevin Hakanson
Cryptography: State of the science
 
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Author: Adi Shamir Delivered by ACM A.M. Turing Laureate Adi Shamir (2002) Citation: Together with Leonard M. Adleman and Ronald Rivest, for their ingenious contribution to making public-key cryptography useful in practice.
End-to-end encryption, code security & JavaScript cryptography
 
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MEGA CTO Mathias Ortmann talks at Kiwicon about end-to-end encryption, code security & JavaScript cryptography. Slides: https://mega.co.nz/#F!Z8EhiTwA!RhAEtGt8q8ccdH0xPprskw MEGA's approach to accessible E2E - insecure by design? MEGA's primary design goal was easily accessible client-side cryptography. Using the world's most ubiquitous runtime environment seemed like a natural choice, but was it really a good one from a security/trust perspective?
Views: 21505 MEGA
History of Cryptography
 
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Brief History of Cryptography
Views: 193 shaan1111
History of Cryptography
 
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Brief History of Cryptography
Views: 9165 shaan1111
Crypto Primitives -- The Building Blocks of Modern Cryptography
 
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Substitution, Transposition, Split and Concatenation, and Bitwise operation between two strings -- are the common primitives that combine into assembling the mainstay ciphersystems we use today. It's critical to understand what these primitives are.
Views: 2107 Gideon Samid
Computer and Network Security - Symmetric Key Encryption
 
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Computer and Network Security - Symmetric Key Encryption
Views: 2090 Jeff Miller
3rd BIU Winter School on Cryptography: Identity-Based Encryption and Variants - Dan Boneh
 
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The 3rd Bar-Ilan Winter School on Cryptography: Bilinear Pairings in Cryptography, which was held between February 4th - 7th, 2013. The event's program: http://crypto.biu.ac.il/winterschool2013/schedule2013.pdf For All 2013 Winter school Lectures: http://www.youtube.com/playlist?list=PLXF_IJaFk-9C4p3b2tK7H9a9axOm3EtjA&feature=mh_lolz Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 5939 barilanuniversity
Adventures in Public-Key Cryptanalysis part 2 - Nadia Heninger Technion Lecture
 
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Adventures in Public-Key Cryptanalysis Prof. Nadia Heninger of the University of Pennsylvania at TCE Summer School 2013 We rely on public-key cryptography to secure our communications and authenticate ourselves. This tutorial will discuss how the security of these cryptosystems can go wrong in practice, due to faulty implementations, poor parameter choices, and state-of-the-art cryptanalysis. We will draw from applications as diverse as TLS, smart cards, and bitcoins.
Views: 648 Technion
IINS 2.0 (CCNA Sec) Symmetric and Asymmetric Encryption Algorithms
 
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In this clip from the live online IINS 2.0 (CCNA Sec) course at StormWind.com, Anthony Sequeira explains the basic operation of symmetric and asymmetric encryption algorithms.
Views: 4321 StormWind Studios
Copy of CISSP Training - Cryptography
 
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www.CISSPTrainingVideos.com This video on Cryptography (Part 1 of 3) is part of our CISSP certification Training Series. (ISC)2 CISSP certification is one of the top security certifications you can achieve, and our expert instructor walks you step by step trough all 10 domains in the CISSP Common Body of Knowledge (CBK). Visit us at CISSPTrainingVideos.com for full details about this amazing series.
Views: 2623 The Geek Academy
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: 461555 World Science Festival
REALITY LOST - BONUS THREE (CHRISTIAN KURTSIEFER ON HACKING QUANTUM CRYPTOGRAPHY)
 
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A bonus scene from REALITY LOST, a different documentary about quantum mechanics by Karol Jalochowski, the movie produced by Centre for Quantum Technologies (CQT) at National University of Singapore. Christian Kurtsiefer, a Principal Investigator at CQT, explains how and why he hacks quantum cryptographic systems. Dag Kaszlikowski is the host. We filmed this conversation at the Thow Kwang Pottery Jungle. SYNOPSIS When 20th century begun, a major shift took place in science. Scientists started making experiments with an unprecedented precision. Fiddle with single particles, atoms, and electrons. And they got bewildered. Small objects seemed to have a sort of fuzzy properties. What's more - the very act of observing them, of measuring them, seemed to bring them to live, excavate them from a vague domain. Equations of quantum mechanics were beautiful. They did generate astonishingly correct answers for mind boggling questions about the exotic micro world. But there was a price to pay. Objective reality had to go. Was is regained? --------------------------------------------- SCIENTISTS ON SCREEN Dagomir Kaszlikowski Physicist, theorist, Centre for Quantum Technologies, National University of Singapore Artur Ekert Physicist, theorist, director of Centre for Quantum Technologies, National University of Singapore; Professor of Quantum Physics, Mathematical Institute, University of Oxford Valerio Scarani Physicist, theorist, Centre for Quantum Technologies, National University of Singapore Christian Kurtsiefer Physicist, experimentalist, Centre for Quantum Technologies, National University of Singapore Charles Bennett Physicist, information theorist and IBM Fellow at IBM Research. Gilles Brassard Physicist, theorist at Université de Montréal Stephanie Wehner Physicist, theorist, Centre for Quantum Technologies, National University of Singapore Vlatko Vedral Physicist, theorist, Centre for Quantum Technologies, National University of Singapore, and University of Oxford WRITTEN AND FILMED BY Karol Jalochowski HOSTED BY Dagomir Kaszlikowski SUPPORTED BY Artur Ekert DANCE CHOREOGRAPHED AND PERFORMED BY Strangeweather Movement Group Segments adapted from the performance "The Spooky Action at a Distance" Faye Lim Bernice Lee Christina Chan Jia Ai Daniel Sahagun Sanchez - a physicists too COLLAPSE SEQUENCE WRITTEN BY Dagomir Kaszlikowski COLLAPSE SEQUENCE FILMED BY Dagomir Kaszlikowski Karol Jalochowski COLLAPSE SEQUENCE PLAYED BY Dagomir Kaszlikowski Pawel Kurzynski POTTERY SEQUENCES FILMED AT Thow Kwang Industry ARTWORKS BY Steven Low Thia Kwang Ng Yang Ce MUSIC Jessica Lurie Ensemble "Baba Yaga's Seven League Boots", "Shop of Wild Dreams", "Dreamsville", "Hunger Artist Theme", "The 43rd Day", "Sleepwalker's Travel Guide", "Pinjur", "Grinch", "Z.I.P.A.", "For A Thousand Kisses (instrumental version)", "I Don't Care If I Don't Care (instrumental version)" ADDITIONAL PHOTOGRAPHY Dagomir Kaszlikowski SOUND CO-RECORDED BY Momo Lu Yin PHOTOGRAPHS European Laboratory for Particle Physics Leo Baeck Institute Krishnamurti Foundation Trust MANY THANKS TO Ewa, Kajtek, and Jedrek Jalochowski Asanthi Shiyara Mendis Akihito Soeda Jenny Hogan AND MANY THANKS FOR HOSPITALITY TO Tan Teck Yoke and Yulianti Tan of Thow Kwang Industry Ltd. Steven Low Thia Kwang Ng Yang Ce THANKS FOR ENCOURAGEMENT TO Polityka Weekly MOVIE GRANT BY Centre for Quantum Techologies National University of Singapore FILMED IN SINGAPORE, 2013 MOVIE BLOG: quantum-dreams.com
Views: 378 Karol Jalochowski
Asymmetry: Use Cases (Authentication, Verification, Digital Signatures)
 
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Cryptographic Asymmetry is the super brilliant idea that enables a host of Internet usages that were impossible without it: online verification of identities, authentication of messages, non-repudiation, and digital signatures are prime examples discussed in this video.
Views: 2490 Gideon Samid
DES -- Implementation Issues (TripleDES, Key Replacement, Padding)
 
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A Quick survey of major DES implementation issues: original DES is obsolete, Triple-DES, and other remedies. Threat analysis and Key Replacement Policy, and padding schemes. If you encrypt a 4 digits payment PIN, (What Target did...) and pad it with zeros, you weaken DES considerably. You avoid implementation mistakes by learning the machinery of the cipher you use. That is what we do in the Crypto Academy (WeSecure.net/learn).
Views: 11630 Gideon Samid
Homomorphic Encryption from Learning with Errors: Concep ...
 
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Talk at crypto 2013. Authors: Craig Gentry, Amit Sahai, Brent Waters
Views: 2162 TheIACR
Cryptography
 
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Comments/suggestions to: [email protected]
Views: 1458 Asokan Kesavan
CSE571-11-14A: Key Management and Distribution (Part 1 of 2)
 
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First part of Audio/Video Recording of Professor Raj Jain's class lecture on Key Management and Distribution. It covers Key Distribution, Key Distribution Using KDC, Key Distribution Using Public Keys, Secret Key Distribution with Confidentiality and Authentication, Hybrid Key Distribution, Distribution of Public Keys, Public-Key Certificates, PKI, PKIX, and X.509, Root Certificates, Sample X.509 Certificate, X.509 Certificates, CA Hierarchy, X.509 Version 3, X.509 Extensions, Certificate Revocation, Entrusted Certificates
Views: 4025 Raj Jain
Cryptographic Asymmetry -- Some Math Options
 
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The mathematical challenge of asymmetry is met via a substitution 'table' over a very large alphabet, where a key is the power to raise a letter of this alphabet to compute another letter in it, and then finding a corresponding power (the decryption key) to raise the new letter back to the original.
Views: 3859 Gideon Samid
22C3 - Learning Cryptography
 
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22C3: Private Investigations The European Hacker Conference The 22nd Chaos Communication Congress (22C3) is a four-day conference on technology, society and utopia. The Congress offers lectures and workshops on a multitude of topics including (but not limited to) information technology, IT-security, internet, cryptography and generally a critical-creative attitude towards technology and the discussion about the effects of technological advances on society.
Views: 909 HackersOnBoard
How to Extremely Secure Your Files Using 2048-Bit Encryption
 
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Today, the standard file encryption used to secure internet traffic and files would be 128-bit, 256-bit, and maybe even 512-bit. According to the National Institute of Standards and Technology, they have approved AES Crypt, a freeware software that supports 256-bit encryption, as the "latest encryption standard". In the video above, you can learn to secure your documents, music, videos, pictures, and other files with 2048-bits. Please make sure you that you have the required files found in the Requirements list below. I will respond to your questions, comments, concerns in the comments as soon as I can. Requirements Windows Operating System (64-Bit) Administrative Rights AEP PRO 2013: http://adf.ly/UoN3Z Long Password (Easy to Remember) Trial & Error Sample File (Blank Notepad) Back-Up Key (Flash Drive) No Need For Surveys (Rule for my videos) [Archive Extractors] (Optional) 7-Zip: http://adf.ly/O0CFR (Optional) Win-RAR: http://adf.ly/O0CJ4 ________________________________________ Copyright Details Music: "The Party (Part I) by Sonic Breakbeat is licensed under a Creative Commons License". License: http://creativecommons.org/licenses/by/3.0/ ________________________________________ Tags (Please ignore) bit (unit of data size),microsoft windows (operating system),computer,computer file,tutorial,how-to (media genre),best,maker,desktop,files,documents,music,videos,microsoft (business operation),xbox 360 (video game platform),ps3,microsoft office (software),professional,algorithm (mathematical concept),software,antivirus,aes,128-bit,256-bit,64-bit,32-bit,security,flash drive,method,system,management,technology,encryption,aep,private,os x,windows 8,start menu
Views: 6861 OroSanx
How is Data Encryption Deployed Today?
 
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Senior Product Architect for Online Tech, Steve Aiello, continues his data security series of videos on data encryption by explaining how encryption is deployed today and the two different types of decrypting data. To download our encryption white paper visit: http://www.onlinetech.com/resources/white-papers/encryption-of-cloud-data
Digital Signatures: Part 2
 
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Fundamental concepts of Digital Signatures are discussed. ElGamal and Schnorr Digital Signature schemes are analyzed. Digital signature standard is presented.
Views: 1274 Scholartica Channel
More Hiking in Modern Math World (2/7) - Complexity Theory, P versus NP, RSA Cryptography
 
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Learn more on http://www.science4all.org about: P versus NP: http://www.science4all.org/le-nguyen-hoang/pnp/ Divide and Conquer: http://www.science4all.org/le-nguyen-hoang/divide-and-conquer/ Probabilistic Algorithms: http://www.science4all.org/le-nguyen-hoang/probabilistic-algorithms/ Cryptography and Number Theory: http://www.science4all.org/scottmckinney/cryptography-and-number-theory/ By Lê Nguyên Hoang, Not an Ordinary Seminar, GERAD. For one hour, I will take you through some of the most amazing recent subfields of mathematics. From computational theory to chaos theory, from infinity to ergodicity, from mathematical physics to category theory, we will be unveiling mind-blowing results of modern mathematics. Although primarily aimed at non-mathematicians, it should be of great interest to everyone.
Views: 1489 Science4All (english)
Cryptographic Elections How to Simultaneously Achieve Verifiability and Privacy - Alon Rosen
 
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Cryptographic Elections -- How to Simultaneously Achieve Verifiability and Privacy Speaker - Alon Rosen IDC, Herzliya Lecture at Technion-Israel Institute of Technology TCE Summer School 2013 Advances in computer technology have created the illusion that electronic means would bring us closer to achieving improved voting systems. However, if not designed properly, electronic elections carry more risk than reward. The core of the problem is that computers cannot be trusted, both because of malicious software, and because code verification is effectively infeasible. Needless to say that this reduces the trust in the result of the election, and may have disastrous consequences. In this talk I will briefly survey the saga of electronic elections in the United States, and use it to motivate the concept of "software independence" (Rivest and Wack '06). I will then describe how modern cryptographic techniques can be harnessed in order to implement election mechanisms that enable both public verifiability and ballot secrecy. This is a combination that cannot be achieved by other means.
Views: 357 Technion
Google Finishes 2,048-bit Security Upgrade For Web Privacy
 
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Google finishes 2,048-bit security upgrade for Web privacy Prodded by "concerns about overbroad government surveillance," Google beat an end-of-year deadline to retire Web certificates with less secure 1,024-bit encryption keys. [Read more]     http://feedproxy.google.com/~r/cnet/tcoc/~3/A_zL7UdazUo/story01.htm http://www.wochit.com
Views: 301 Wochit Tech
Quantum Computation and Phenomenological Hermeneutics
 
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Date: Friday, May 24, 2013 Quantum Computation and Phenomenological Hermeneutics Knowledge depends on presuppositions embedded in concepts, ways of thinking and language. This lectures examines the implications of paradigm shifts in the different disciplines of sociology and physics. In the discipline of sociology hermeneutics (the art of interpretation) and phenomenology find a place within a horizon of diverse and contested theories and methodologies, while in physics paradigm shifts meet initially with resistance until a new paradigm becomes dominant. Mosca addresses how the quantum paradigm for physics leads to a fundamentally new paradigm for storing and manipulating information, "quantum computation." Bonner addresses the importance of coming to terms with the limits of knowing and control for humans to find a way of being at home in the world. Kieran Bonner (sociology) Kieran Bonner has a B.A. from Trinity College Dublin, an MA and PhD on classical and contemporary social theory from York University, Toronto. He is Professor of Sociology at St. Jerome's University. He has been Visiting Fellow in the Humanities at University College Galway, Ireland, and at the Hannah Arendt Centre at Bard College in New York. He was a co-investigator on a SSHRC project The Culture of Cities: Montreal Toronto Berlin Dublin and on the CIHR project City Life and Well-Being: The Grey Zone of Health and Illness. He is author of two books, and has written articles on topics such as the culture of cities (Dublin, Montreal, Toronto), ethnomethodology, hermeneutics, Socrates, Antigone, Hannah Arendt, interdisciplinary dialogue, student motivation. Michele Mosca (math) MICHELE MOSCA obtained his doctorate in Mathematics at Oxford. He returned to St. Jerome's and the University of Waterloo (C&O Dept.) in 1999 to found a quantum computing group in the Centre for Applied Cryptographic Research. He is co-founder and Deputy Director of the Institute for Quantum Computing (IQC), and a founding member of the Perimeter Institute. His work has spanned the foundations, applications and implementations of quantum information processing. Awards and honours include: 2010 Canada's Top 40 Under 40, Fellow of CIFAR, CRC in Quantum Computation (2002-2012), and University Research Chair (2012-present). http://sju.ca/bridges http://sju.ca/2012-2013-bridges-2 Sponsored by MEF, University of Waterloo Arts, and St. Jerome's University http://arts.uwaterloo.ca/ http://www.student.math.uwaterloo.ca/~mefcom/ http://sju.ca
Cryptography
 
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Used to hide information and send to others in secret forms where they decode them...-- Created using PowToon -- Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 2424 Prapti Sanghavi
RSA Acoustic Cryptanalysis by Genkin, Shamir and Tomer
 
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My understanding and explanation of the the acoustic cryptanalysis attack on RSA by Genkin, Shamir and Tomer. Given on 27 December 2013 at Bangkadi, Pathumthani, Thailand by Steven Gordon. Slides are available at: http://sandilands.info/sgordon/lecture-on-rsa-acoustic-cryptanalysis
Views: 1279 Steven Gordon
cryptographie - 100% Technical
 
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scripting avec PHP pour le cours de cryptographie cryptographie symétrique,cryptographie asymétrique, hybride, hash fichier, PKI, certificat x509 symetrique openssl version openssl list-standard-commands openssl list-cipher-commands /usr/local/lib/libmcrypt openssl ciphers -v Crypt text RAW Crypt text BASE64 Crypt text HEX openssl enc -base64 -e openssl enc -base64 -d asymetrique certificats X509 Generate Private key openssl genrsa -out key.pem 1024 openssl rsa -in key.pem -text -noout openssl enc -base64 -in key.pem Generate Public key openssl rsa -in key.pem -pubout -out Key_pub.pem Hash function md5sum tmp.txt sha1sum tmp.txt openssl dgst -md5 tmp.txt openssl dgst -sha1 tmp.txt SSL openssl smime -verify -in msg.txt openssl dgst -md5 -out message_hash.txt message.txt openssl rsautl -encrypt -in $file -inkey $key -pubin -out $outFile openssl enc -base64 -in $outFile openssl rsautl -decrypt -in $file -inkey $key -out $outFile openssl list-message-digest-commands openssl dgst -sha1 -out $outFile -sign $private_key message.txt openssl dgst -signature $signFile -verify $public_key $outFile openssl x509 -noout -in cert.pem -issuer -subject -dates openssl x509 -text -in certif.crt openssl req -text -in request.csr openssl x509 -noout -in cert.pem -issuer -subject -dates
Views: 1548 Rafik GUEHRIA
Under Surveillance @ CRYPTO 2013 rump session
 
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Under Surveillance @ CRYPTO 2013 rump session (slides: http://crypto.2013.rump.cr.yp.to/5288d160fee64e91624e169924056916.pdf)
Views: 399 Eline Bos
Identity-Based Secure Distributed Data Storage Schemes
 
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To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, 45, KAMARAJ SALAI, THATTANCHAVADY, PUDUCHERRY-9 Landmark: Opposite to Thattanchavady Industrial Estate, Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Identity-Based Secure Distributed Data Storage Schemes Secure distributed data storage can shift the burden of maintaining a large number of files from the owner to proxy servers. Proxy servers can convert encrypted files for the owner to encrypted files for the receiver without the necessity of knowing the content of the original files. In practice, the original files will be removed by the owner for the sake of space efficiency. Hence, the issues on confidentiality and integrity of the outsourced data must be addressed carefully. In this paper, we propose two identity-based secure distributed data storage (IBSDDS) schemes. Our schemes can capture the following properties: (1) The file owner can decide the access permission independently without the help of the private key generator (PKG); (2) For one query, a receiver can only access one file, instead of all files of the owner; (3) Our schemes are secure against the collusion attacks, namely even if the receiver can compromise the proxy servers, he cannot obtain the owner's secret key. Although the first scheme is only secure against the chosen plaintext attacks (CPA), the second scheme is secure against the chosen cipher text attacks (CCA). To the best of our knowledge, it is the first IBSDDS schemes where an access permissions is made by the owner for an exact file and collusion attacks can be protected in the standard model.
Views: 1227 jpinfotechprojects
Powers of a point on an elliptic curve
 
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Elliptic curves modulo a prime or in a number field are used in cryptography. This video illustrates powers of a single element in the elliptic curve y^2 = x^3 - x. Exponentiation in the elliptic curve can be used for a variant of the Diffie-Hellman cryptosystem.
Views: 563 Andreas Müller

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