Search results “Quantum public key cryptosystems” for the 2013
Symmetric Key and Public Key Encryption
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: 439901 itfreetraining
Other Public Key Cryptosystems: Part 2
Fundamental concepts of Diffie-Hellman Key exchange are discussed. ElGamal Cryptosystem is presented. Elliptic curves are Analyzed.
Views: 441 Scholartica Channel
Quantum Key Review
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
How asymmetric (public key) encryption works
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: 200598 Veet Vivarto
Cryptographic Asymmetry -- Some Math Options
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: 3804 Gideon Samid
Quantum Encryption Loopholes by ṤⱧǠᴆŐƜ
Quantum Encryption Loopholes
Views: 1975 ṤⱧǠ ᴆŐƜ
Key Management & Distribution: Part 1
Fundamental concepts of Distribution of public & private keys are discussed. PKI and PKIX are analyzed. Digital certificates standards are presented
Views: 3566 Scholartica Channel
Biometric Encryption System
AcceSys Technology LLC Innovative Research BES - Biometric Encryption System
Views: 335 AcceSysTechnology
The physics of cryptography - Renato Renner
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
David Kahn on recent developments in cryptography and stealing code keys
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: 1786 SmartMonkeyTV
Asymmetry: Use Cases (Authentication, Verification, Digital Signatures)
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: 2471 Gideon Samid
Adventures in Public-Key Cryptanalysis part 2 - Nadia Heninger Technion Lecture
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: 644 Technion
What is Encryption?
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
How is Data Encryption Deployed Today?
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 1
Fundamental concepts of Digital Signatures are discussed. ElGamal and Schnorr Digital Signature schemes are analyzed. Digital signature standard is presented.
Views: 3764 Scholartica Channel
CSE571-11-10B: Other Public-Key Cryptosystems (Part 2 of 2)
Second part of Audio/Video Recording of Professor Raj Jain's class lecture on Other Public-Key Cryptosystems. It covers Diffie-Hellman Key Agreement, Man-in-Middle Attack on Diffie-Hellman, ElGamal Cryptography, Elliptic Curve Cryptography, Elliptic Curves over Real Numbers, Finite Elliptic Curves, Finite Elliptic Curve Example, ECC Diffie-Hellman, ECC Encryption/Decryption, ECC Security, PRNG based on Asymmetric Ciphers, PRNG based on RSA, PRNG based on ECC
Views: 1331 Raj Jain
Computer and Network Security - Symmetric Key Encryption
Computer and Network Security - Symmetric Key Encryption
Views: 2077 Jeff Miller
Crypto Primitives -- The Building Blocks of Modern Cryptography
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: 2020 Gideon Samid
DES -- Implementation Issues (TripleDES, Key Replacement, Padding)
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: 11456 Gideon Samid
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
History of Cryptography
Brief History of Cryptography
Views: 8774 shaan1111
The Cryptographic Lens: Visions of our Past and Future
Shafi Goldwasser, MIT Symposium on Visions of the Theory of Computing, May 30, 2013, hosted by the Simons Institute for the Theory of Computing at UC Berkeley.
Views: 1531 Simons Institute
Discrete Mathematics - Cryptography - 02 lect 19
Aduni - Discrete Mathematics - Cryptography - Shai Simonson
Views: 1945 uthcode
3rd BIU Winter School on Cryptography:The Basics of Pairings - Dan Boneh
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: 7603 barilanuniversity
Homomorphic Encryption from Learning with Errors: Concep ...
Talk at crypto 2013. Authors: Craig Gentry, Amit Sahai, Brent Waters
Views: 2110 TheIACR
05 Jeff Hoffstein on NTRU and Lattice-Based Signatures
Jeff Hoffstein's August 13, 2013 lecture at the UCI Workshop on Lattices with Symmetry.
Claude Crépeau Lecture 2
Professor Claude Crépeau of McGill University presents the second lecture reviewing cryptography systems, code based and multi-variate polynomials based cryptography and cryptographic money based on hidden codes. This lecture was part of a series of four lectures during Spring 2013. Find out more about IQC! Website - https://uwaterloo.ca/institute-for-quantum-computing/ Facebook - https://www.facebook.com/QuantumIQC Twitter - https://twitter.com/QuantumIQC
Digital Signatures: Part 2
Fundamental concepts of Digital Signatures are discussed. ElGamal and Schnorr Digital Signature schemes are analyzed. Digital signature standard is presented.
Views: 1257 Scholartica Channel
Comments/suggestions to: [email protected]
Views: 1435 Asokan Kesavan
History of Cryptography
Brief History of Cryptography
Views: 181 shaan1111
Has the NSA Won The Crypto Wars?
Until recently, many people believed that the so-called "Crypto Wars" were over and that the U.S. government supported strong encryption for the public. Now new leaks allege that the NSA has deliberately introduced weaknesses and backdoors into commercial products and security standards. These revelations may have substantive and long-lasting consequences on the reputations of U.S. tech companies. In addition, these claims may significantly weaken the effectiveness of the federal government in helping improve cyber security in commercial products, both domestically and internationally. This event will explore how these most recent claims relate to past debates about cryptography, such as the Clipper Chip debate of the 1990s, the lessons that policymakers should take from these past debates, the impact that these allegations might have on the tech industry, and the implications that this news has for consumers and businesses.
Views: 544 techpolicy
RSA Algorithm concept and Example
Enroll to Full Course: https://goo.gl/liK0Oq Networks#4: The video explains the RSA Algorithm (public key encryption) Concept and Example along with the steps to generate the public and private keys. The video also provides a simple example on how to calculate the keys and how to encrypt and decrypt the messages. For more, visit http://www.EngineeringMentor.com. FaceBook: https://www.facebook.com/EngineeringMentor. Twitter: https://www.twitter.com/Engi_Mentor
Views: 158546 Skill Gurukul
Encryption algorithms
Free Download: http://yazsys.com/Encryption_algorithms.aspx Encryption Algorithm YAz Is an algorithm to encrypt text messages through Binary Code encryption and ASCII Code encryption of the character and HEX Code encryption for files This algorithm is based on segmentation characters from 1 to 8 bits and encrypt each part independently or may not be encrypted part of the character with the other parts of the characters and according to the location of a character in the message, either for files are encrypted HEX Code to a file and then re-save it.
Views: 2611 encryption algorithms
3rd BIU Winter School on Cryptography: Identity-Based Encryption and Variants - Dan Boneh
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: 5755 barilanuniversity
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: 2391 Prapti Sanghavi
Under Surveillance @ CRYPTO 2013 rump session
Under Surveillance @ CRYPTO 2013 rump session (slides: http://crypto.2013.rump.cr.yp.to/5288d160fee64e91624e169924056916.pdf)
Views: 396 Eline Bos
How to Extremely Secure Your Files Using 2048-Bit Encryption
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: 6761 OroSanx
DSD 72B-SP Optical Network Encryption
Learn how TCC's DSD 72B-SP interoperable SONET/SDH optical data encryption family with trusted, automated KEYNET key and device management can protect your mission-critical communications.
Views: 396 TechnicalCommsCorp
22C3 - Learning Cryptography
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: 901 HackersOnBoard
Powers of a point on an elliptic curve
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: 555 Andreas Müller

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