Home
Search results “Trapdoor meaning in cryptography math”
What is a trapdoor function?
 
04:06
Modern cryptography depends on the existence of several special kinds of mathematical functions. One important kind is a trapdoor function. Trapdoor functions are somewhat similar to hash functions in that they are easy to compute but hard to invert…​ except if you know a secret piece of information. So if someone does not have the secret or key, they cannot invert the function. If they do, they can open the trapdoor and invert the function. Trapdoor functions form the basis of modern cryptographic techniques that are widely-used online. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 8640 internet-class
One Way Function - Applied Cryptography
 
01:15
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 11287 Udacity
What is a Trap door function
 
05:39
A video submission to CSE 199 class.
Views: 1677 hoan duc
TCS+ talk: Sanjam Garg
 
01:05:26
Speaker: Sanjam Garg (UC Berkeley) Title: Identity-Based Encryption from the Diffie-Hellman Assumption Abstract: In this talk, I will describe new constructions of identity-based encryption based on the hardness of the Diffie-Hellman (without using groups with pairings) Problem. Previously, constructions based on this assumption were believed to be impossible. Our construction is based on new techniques that bypass the known impossibility results using garbled circuits that make a non-black-box use of the underlying cryptographic primitives. (Based on joint work with Nico Döttling.)
Views: 366 TCS+
Applied Cryptography: Introduction to One-Way Functions - Part 5
 
08:50
The definition of a trapdoor one-way function is given in this video. This video also shows that the RSA function has a "trapdoor"
Views: 470 Leandro Junes
Fully Homomoorphic Encryption - Shai Halevi
 
01:27:49
Shai Halevi, IBM Research: Fully homomoorphic encryption. http://www1.biu.ac.il/indexE.php
Views: 3494 barilanuniversity
Trapdoor Function.
 
05:45
Views: 108 118yt118
Program Threats (Trapdoors), System Threats (Worms, Virus) in Operating System
 
07:04
Program Threats (Trapdoors), System Threats (Worms, Virus) in Operating System Like Us on Facebook - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Operating System Hindi Classes Operating System Tutorial for Beginners in Hindi Operating System Study Notes Operating System Video Lectures
An Introduction to Mathematical Cryptography
 
01:21
Learn more at: http://www.springer.com/978-1-4939-1710-5. New edition extensively revised and updated. Includes new material on lattice-based signatures, rejection sampling, digital cash, and homomorphic encryption. May be used in a classroom setting or independent study, and as a standard reference for researchers in the field.
Views: 239 SpringerVideos
8  Trapdoor Function
 
01:18
Views: 991 施凱文
What does trapdoor function mean?
 
00:42
What does trapdoor function mean? A spoken definition of trapdoor function. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/trapdoor_function Text to Speech powered by TTS-API.COM
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
08:38
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: 628036 Art of the Problem
Identity-Based (Lossy) Trapdoor Functions and Applications.
 
23:58
Talk at eurocrypt 2012. Authors: Mihir Bellare, Eike Kiltz, Chris Peikert, Brent Waters. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24244
Views: 1176 TheIACR
Cryptography from Ideal Lattices
 
01:08:17
Damien Stehlé, École Normale Supérieure de Lyon The Mathematics of Modern Cryptography http://simons.berkeley.edu/talks/damien-stehle-2015-07-07
Views: 1113 Simons Institute
How Bitcoin Works Under the Hood
 
22:25
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: 2657328 CuriousInventor
Trapdoor - Maths game
 
02:18
Maths game
Views: 1548 Geeta Baruah
Eve The Magician Cracks A Tunnel - Bleichenbacher's attack
 
08:04
http://asecuritysite.com/encryption/c_c3
Views: 1433 Bill Buchanan OBE
Hashing Algorithms and Security - Computerphile
 
08:12
Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 766394 Computerphile
Elliptic Curve Point Addition
 
06:27
This was for the MAO Math Presentation Competition. I won! :D
Views: 31298 Riverninj4
RSA encryption: Step 4 | Journey into cryptography | Computer Science | Khan Academy
 
04:58
RSA worked example Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/checkpoint-advanced-lessons?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/euler-s-totient-function-phi-function?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: 96197 Khan Academy Labs
Applied Cryptography: The Discrete Log Problem - Part 5
 
11:10
This video gives the definition of the discrete logarithm problem in the cyclic group Zn* for n=2, 4, p^k, 2 p^k, where "p" is odd prime numbers. Several computations are given in this video.
Views: 1126 Leandro Junes
This Video was Not Encrypted with RSA | Infinite Series
 
09:48
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Learn through active problem-solving at Brilliant: https://brilliant.org/InfiniteSeries/ Last episode we discussed Symmetric cryptography https://www.youtube.com/watch?v=NOs34_-eREk Here we break down Asymmetric crypto and more. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode (Almost) Unbreakable Crypto | Infinite Series https://www.youtube.com/watch?v=NOs34_-eREk How To Break Cryptography https://www.youtube.com/watch?v=12Q3Mrh03Gk&list=PLa6IE8XPP_gnot4uwqn7BeRJoZcaEsG1D&index=2 Last time, we discussed symmetric encryption protocols, which rely on a user-supplied number called "the key" to drive an algorithm that scrambles messages. Since anything encrypted with a given key can only be decrypted with the same key, Alice and Bob can exchange secure messages once they agree on a key. But what if Alice and Bob are strangers who can only communicate over a channel monitored by eavesdroppers like Eve? How do they agree on a secret key in the first place? Written and Hosted by Gabe Perez-Giz Produced by Rusty Ward Graphics by Ray Lux Assistant Editing and Sound Design by Mike Petrow and Meah Denee Barrington Made by Kornhaber Brown (www.kornhaberbrown.com) Thanks to Matthew O'Connor and Yana Chernobilsky who are supporting us on Patreon at the Identity level! And thanks to Nicholas Rose and Mauricio Pacheco who are supporting us at the Lemma level!
Views: 57342 PBS Infinite Series
What is asymmetric encryption?
 
06:23
In symmetric key encryption the same key is used for both encryption and decryption. In contrast, in asymmetric key encryption a public key (known to everyone) is used for encryption and a private key (known only to the recipient) is used for decryption. Many asymmetric key encryption approaches are based on factoring as a trapdoor function, with the public key being the multiple of the two secret primes and the private key being the two secret primes. Asymmetric key encryption allows one party to encrypt a message to a second party they have never communicated with previously. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 927 internet-class
Elliptic Curve Cryptography Overview
 
11:29
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: 169720 F5 DevCentral
Cryptographic Hash functions - how your passwords and other credentials are stored in databases
 
22:25
Lesson 3 of cryptography series (to see all video check cryptography playlist - link given below). cryptography playlist : https://www.youtube.com/watch?v=_Yw7QWbk9Vs&list=PLf8bMP4RWebLVGpUnhji9Olkj1jdXfzFd Subscribe to our new youtube channel also : https://www.youtube.com/channel/UCNx1Gkyy9LfOxDMbcOKuV4g cryptographic hash functions - storing data in databases securely this video includes : what are hash functions , what is the use of hash functions , how confidential information like passwords are stored in databases , why do we use hash functions , properties or features of hash functions , what is an ideal hash etc I have used md5 hash an an example though md5 as per me is one of worst hashes but for learning point of view its best hash as per me . like my page on facebook : https://www.facebook.com/guidetohacking/ #cryptography #hash #function
O.S Security | Levels of Security, Various Authentication Methods
 
12:49
O.S Security | Levels of Security, Various Authentication Methods Like Us on Facebook - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Operating System Hindi Classes Operating System Tutorial for Beginners in Hindi Operating System Study Notes Operating System Video Lectures
Applied Cryptography: Introduction to One-Way Functions - Part 2
 
18:02
This video discusses 1-1 functions, surjective functions, and bijective functions. Several examples are given. These concepts are given in preparation for the definition of "One-Way Function"
Views: 838 Leandro Junes
3rd BIU Winter School on Cryptography:The Basics of Pairings - Dan Boneh
 
01:14:45
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: 8008 barilanuniversity
Public Key Compression and Modulus Switching for Fully H ...
 
28:32
Talk at eurocrypt 2012. Authors: Jean-Sébastien Coron, David Naccache, Mehdi Tibouchi. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24255
Views: 404 TheIACR
Pseudorandom Functions and Lattices
 
04:26
Crypto 2011 Rump session presentation for Abhishek Banerjee, Chris Peikert, Alon Rosen, talk given by Chris Peikert
Views: 646 TheIACR
Winter School on Cryptography: A History of Lattice-Based Encryption - Vadim Lyubashevsky
 
01:00:06
Winter School on Lattice-Based Cryptography and Applications, which took place at Bar-Ilan University between february 19 - 22. The event's program: http://crypto.biu.ac.il/winterschool2012/ Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 3727 barilanuniversity
Cryptographic Elections How to Simultaneously Achieve Verifiability and Privacy - Alon Rosen
 
57:05
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: 372 Technion
Applied Cryptography: Introduction to One-Way Functions - Part 3
 
21:49
The definition of a one-way function is given in this video. Several examples of one-way functions are given.
Views: 710 Leandro Junes
Hierarchical Identity Based Encryption from Affine Messafe Authentication
 
18:04
Presentation at Crypto 2014. Paper by Olivier Blazy and Eike Kiltz and Jiaxin Pan. http://www.iacr.org/cryptodb/data/paper.php?pubkey=25179
Views: 1111 TheIACR
Decentralizing Attribute-Based Encryption
 
01:05:50
We present a Multi-Authority Attribute-Based Encryption (ABE) system. In our system, any party can become an authority and there is no requirement for any global coordination other than the creation of an initial set of common reference parameters. A party can simply act as an ABE authority by creating a public key and issuing private keys to different users that reflect their attributes. A user can encrypt data in terms of any boolean formula over attributes issued from any chosen set of authorities. Finally, our system does not require any central authority. In this talk, I will present our system and discuss its proof, which employs dual system encryption techniques. Our system uses bilinear groups of composite order, and we prove security under static assumptions in the random oracle model. This is joint work with Brent Waters.
Views: 1684 Microsoft Research
Fully Homomorphic Encryption; Bi-Deniable Encryption; We Have The Technology, Now Where Next?
 
01:47:47
Fully Homomorphic Encryption over the Integers Vinod Vaikuntanathan, Microsoft Research We construct a simple fully homomorphic encryption scheme, using only elementary modular arithmetic. The security of our scheme relies on the hardness of the approximate integer greatest common divisors (gcd) problem -- namely, given a list of integers that are 'near-multiples' of a hidden integer, output that hidden integer. Joint work with Marten van Dijk, Craig Gentry, and Shai Halevi. Bi-Deniable Encryption Chris Peikert, Georgia Tech A *deniable* encryption scheme allows a sender and/or receiver, having already performed some encrypted communication, to produce `fake' but legitimate-looking encryption coins and/or decryption keys that make the ciphertext appear as an encryption of some message other than the `true' one. Deniability is a powerful notion for both theory and practice: apart from its inherent utility for resisting coercion, a deniable scheme is also *noncommitting* (an important property for constructing adaptively secure protocols), and secure under selective-opening attacks. To date, however, known constructions have achieved only limited forms of deniability, requiring at least one party to remain uncoerced, and in some cases using an interactive protocol. Our main result is a *bideniable* public-key cryptosystem, i.e., one in which both the sender and receiver can simultaneously equivocate; we stress that the scheme is noninteractive and involves no external parties. The construction is based on the (worst-case) hardness of lattice problems. This is joint work with Adam O'Neill at Georgia Tech. We Have The Technology, Now Where Next? David Molnar, MSR What will it take to convince people that cryptography makes the cloud safe? How might our favourite cryptographic constructions work together with systems moving to the cloud? I will describe examples where existing policies blocked movement of data or computation to the cloud. I will then discuss trends in cloud audit approaches and in document labeling that may be complementary to the use of cloud cryptography. Finally I will talk about what is required today for storing highly sensitive data on premises in a large company.
Views: 616 Microsoft Research
6.875 (Cryptography) L6: Pseudorandom Generators
 
01:18:35
Spring 2018 Cryptography & Cryptanalysis Prof. Vinod Vaikuntanathan
Views: 217 Andrew Xia
Threat Monitoring (Firewall) and Technique of Encryption in Operating System
 
07:31
Threat Monitoring (Firewall) and Technique of Encryption in Operating System Like Us on Facebook - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Operating System Hindi Classes Operating System Tutorial for Beginners in Hindi Operating System Study Notes Operating System Video Lectures
Knapsack Problem In Cryptography | Knapsack Public Key Encyption
 
13:38
In this video you will learn how to solve knapsack problem in cryptography .. encrytion and decryption of any letter using ASCII value and convert them into binary .. which will make hard of any intruder to decrypt the message Please subscribe and like video . Thanks Visit Our Channel :- https://www.youtube.com/channel/UCxik... In this lecture we have taught about Knapsack Public Key Cryptography and how to solve it with example. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Instagram :- https://www.instagram.com/ankit_soni1511
Views: 10686 Quick Trixx
Zero-Knowledge Arguments for Lattice-Based Accumulators
 
20:45
Full title: Zero-Knowledge Arguments for Lattice-Based Accumulators: Logarithmic-Size Ring Signatures and Group Signatures Without Trapdoors, Benoît Libert and San Ling and Khoa Nguyen and Huaxiong Wang. Talk at Eurocrypt 2016. See http://iacr.org/cryptodb/data/paper.php?pubkey=27634
Views: 378 TheIACR
Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example
 
05:56
Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
Winter School on Secure Computation and Efficiency
 
01:37:33
Winter School on Secure Computation and Efficiency. Prof. Yehuda Lindell. Background and definitions. Department of Computer Science . Bar-Ilan: http://www1.biu.ac.il/indexE.php Why Bar-Ilan: http://www1.biu.ac.il/indexE.php?id=6382&pt=1&pid=30&level=2&cPath=6382 Department of Computer Science: http://www.cs.biu.ac.il/
Views: 2704 barilanuniversity
User Authentication Introduction - Passwords Based , Derived from Passwords, MD of Passwords
 
16:51
User Authentication Introduction to Passwords Based Authentication, Derived from Passwords, MD of Passwords Keywords: User Authentication Password Based Authentication Network Security Notes Computer Network Security Notes Something derived from passwords Problems with Clear Text Password Schemes Message Digest(MD) of Passwords
RSA Cryptosystem
 
30:55
Subject:Computer Science Paper: Cryptography and network
Views: 260 Vidya-mitra
Winter School on Cryptography: Cryptanalysis of GGH and NTRU Signatures - Oded Regev
 
59:35
Winter School on Lattice-Based Cryptography and Applications, which took place at Bar-Ilan University between february 19 - 22. The event's program: http://crypto.biu.ac.il/winterschool2012/ Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 1781 barilanuniversity
Winter School on Cryptography: Fully Homomorphic Encryption and the Bootstrapping - Craig Gentry
 
50:40
Winter School on Lattice-Based Cryptography and Applications, which took place at Bar-Ilan University between february 19 - 22. The event's program: http://crypto.biu.ac.il/winterschool2012/ Dept. of Computer Science: http://www.cs.biu.ac.il/ Bar-Ilan University: http://www1.biu.ac.il/indexE.php
Views: 2834 barilanuniversity
Canonical depth-three Boolean...and matrix rigidity - Oded Goldreich
 
47:14
A Celebration of Mathematics and Computer Science Celebrating Avi Wigderson's 60th Birthday October 5 - 8, 2016 More videos on http://video.ias.edu
Adaptively Secure Identity-Based Encryption from Lattices with ...
 
25:25
Adaptively Secure Identity-Based Encryption from Lattices with Asymptotically Shorter Public Parameters, by Shota Yamada, talk at Eurocrypt 2016. See http://iacr.org/cryptodb/data/paper.php?pubkey=27622
Views: 117 TheIACR