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Search results “Trapdoor meaning in cryptography math”

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: 7793 internet-class

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A video submission to CSE 199 class.
Views: 1500 hoan duc

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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: 10241 Udacity

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Views: 72 118yt118

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Views: 878 施凱文

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trusted 3rd parties To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 346 intrigano

51:27
“Introduction and Overview of Verifiable Computation", a lecture given by Prof. Michael Walfish, during the Department of Computer Studies' Winter School, held by Bar-Ilan University in January 2016. For the full event playlist: https://www.youtube.com/playlist?list=PLXF_IJaFk-9ADeshgHXrSfuwPyEMa5qS7 Bar-Ilan University: http://www1.biu.ac.il/en Department of Computer Science: http://cs.biu.ac.il//en
Views: 1077 barilanuniversity

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: 349 Technion

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Views: 2529 intrigano

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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 606233 Art of the Problem

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: 1157 TheIACR

52:39
Talk at Eurocrypt 2012. Author: Alfred Menezes. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24260
Views: 1535 TheIACR

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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: 217 SpringerVideos

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Maths game
Views: 1534 Geeta Baruah

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

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Views: 233 CISSP Fundamentals

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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

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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: 729 Leandro Junes

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: 7688 barilanuniversity

01:10:46
Recent work has solidly established lattice-based signatures as a viable replacement for number-theoretic schemes should quantum computing come into fruition. In fact, the current lattice-based schemes have key and signature sizes comparable to RSA while being an order of magnitude faster. The main focus of this talk will be presenting the main ideas behind the latest results in this area. In addition to the high level intuition, I will try to motivate the many employed optimizations, such as having an NTRU-like public key and sampling from a bimodal Gaussian distribution. Most of the talk will be based on the papers "Lattice Signatures without Trapdoors" and "Lattice Signatures and Bimodal Gaussians". The latter is joint work with Leo Ducas, Alain Durmus, and Tancrede Lepoint.
Views: 589 Microsoft Research

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John Wagnon discusses the basics and benefits of Elliptic Curve Cryptography (ECC) in this episode of Lightboard Lessons. Check out this article on DevCentral that explains ECC encryption in more detail: https://devcentral.f5.com/articles/real-cryptography-has-curves-making-the-case-for-ecc-20832
Views: 151105 F5 DevCentral

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: 764 internet-class

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Hardness of k-LWE and Applications in Traitor Tracing by Duong Hieu Phan, Ron Steinfeld, Damien Stehlé, San Ling. Talk at Crypto 2014.
Views: 203 TheIACR

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The definition of a one-way function is given in this video. Several examples of one-way functions are given.
Views: 628 Leandro Junes

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A Celebration of Mathematics and Computer Science Celebrating Avi Wigderson's 60th Birthday October 5 - 8, 2016 More videos on http://video.ias.edu

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usenix 2014 this video is not belong to me
Views: 617 Hailey Bang

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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: 55325 PBS Infinite Series

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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: 973 Leandro Junes

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Subject:Computer Science Paper: Cryptography and network
Views: 151 Vidya-mitra

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Protection & Security Introduction | Goals of Protection | Domains of Protection 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

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Abstract: In this paper, we study succinct computationally sound proofs (arguments) for NP, whose communication complexity is poly-logarithmic the instance and witness sizes. The seminal works of Kilian '92 and Micali '94 show that such arguments can be constructed under standard cryptographic hardness assumptions with four rounds of interaction, and that they be made non-interactive in the random-oracle model. The latter construction also gives us some evidence that succinct non interactive arguments (SNARGs) may exist in the standard model with a common reference string (CRS), by replacing the oracle with a sufficiently complicated hash function whose description goes in the CRS. However, we currently do not know of any construction of SNARGs with a formal proof of security under any simple cryptographic assumption. In this work, we give a broad black-box separation result, showing that black-box reductions cannot be used to prove the security of any SNARG construction based on any falsifiable cryptographic assumption. This includes essentially all common assumptions used in cryptography (one-way functions, trapdoor permutations, DDH, RSA, LWE etc.). More generally, we say that an assumption is falsifiable if it can be modeled as an interactive game between an adversary and an efficient challenger that can efficiently decide if the adversary won the game. This is similar, in spirit, to the notion of falsifiability of Naor '03, and captures the fact that we can efficiently check if an adversarial strategy breaks the assumption. Our separation result also extends to designated verifier SNARGs, where the verifier needs a trapdoor associated with the CRS to verify arguments, and slightly succinct SNARGs, whose size is only required to be sub-linear in the statement and witness size. Joint work with Craig Gentry.
Views: 79 Microsoft Research

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Views: 689 Osiris Salazar

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Euclid's Algorithm Link: [Coming Soon] in the mean time use this link: http://www.asakusuma.com/euclidean/euclidean.php Another animated attempt of explaining the RSA cipher (public key cryptography aka asymmetric key cryptography). This tutorial includes rules of the cipher followed by an example to clear things up. This video talks mostly about encrypting blocks size of two text and will briefly skim over the methods in encrypting larger block sizes. This was a part of my final year project to create a learning aid. I decided to upload this so the animation won't go to waste. All feedbacks welcome. Do note: this video is meant for people who already have basic knowledge of the RSA cipher and is a part of an application created for my dissertation. Special thanks for Olivia Beck for creating the background image Facebook: http://tinyurl.com/kennyplaysguitar Twitter: https://twitter.com/kenwinlam
Views: 43639 Kenny Luminko

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Web Engineering Security 6 | Web Attacks and their Prevention – SQL Injection, XSS etc. Like Us on Facebook - https://goo.gl/DdiLta Web Security Classes in Hindi Web Security Tutorial for Beginners Web Security Study Notes Web Engineering Notes Web Technology Notes

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Before we start talking about internet security, we need to introduce two very special people: Alice and Bob. We’ll find Alice and Bob forever trying to perform various security-related tasks online, and constantly threatened by mysterious and powerful adversaries. 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: 2403 internet-class

08:09
Cryptography constructing compression functions To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 198 intrigano

50:32
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 11468 nptelhrd

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Presentation by Nairen Cao, Adam O'Neill, Mohammad Zaheri at Crypto 2018 Rump Session.
Views: 111 TheIACR

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Crypto 2011 Rump session presentation for Abhishek Banerjee, Chris Peikert, Alon Rosen, talk given by Chris Peikert
Views: 633 TheIACR

26:19
Talk at pkc 2010. Authors: Stanislaw Jarecki, Ali Bagherzandi. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=23402
Views: 483 TheIACR

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Key-Aggregate Searchable Encryption (KASE) for Group Data Sharing via Cloud Storage To get this project in ONLINE or through TRAINING Sessions, Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com ABSTRACT: The capability of selectively sharing encrypted data with different users via public cloud storage may greatly ease security concerns over inadvertent data leaks in the cloud. A key challenge to designing such encryption schemes lies in the efficient management of encryption keys. The desired flexibility of sharing any group of selected documents with any group of users demands different encryption keys to be used for different documents. However, this also implies the necessity of securely distributing to users a large number of keys for both encryption and search, and those users will have to securely store the received keys, and submit an equally large number of keyword trapdoors to the cloud in order to perform search over the shared data. The implied need for secure communication, storage, and complexity clearly renders the approach impractical. In this paper, we address this practical problem, which is largely neglected in the literature, by proposing the novel concept of key aggregate searchable encryption (KASE) and instantiating the concept through a concrete KASE scheme, in which a data owner only needs to distribute a single key to a user for sharing a large number of documents, and the user only needs to submit a single trapdoor to the cloud for querying the shared documents. The security analysis and performance evaluation both confirm that our proposed schemes are provably secure and practically efficient.
Views: 187 jpinfotechprojects

57:51
In this talk I will survey a recently introduced cryptographic problem called Learning with Rounding (LWR). I will show reductions from and to the more well-established Learning with Errors (LWE) problem, and demonstrate the applicability of LWR to the construction of efficient Pseudorandom Functions and other cryptographic primitives.
Views: 213 Microsoft Research

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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: 2753 barilanuniversity

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RSA ASYMMETRIC KEY CRYPTOGRAPHY IN HINDI
Views: 375 LearnEveryone

26:08
Institute for Quantum Computing member John Schanck presented a talk titled: transcript secure signatures based on modular lattices at the 2014 PQCrypto conference in October, 2014. Abstract: We introduce a class of lattice-based digital signature schemes based on modular properties of the coordinates of lattice vectors. We also suggest a method of making such schemes transcript secure via a rejection sampling technique of Lyubashevsky (2009). A particular instantiation of this approach is given, using NTRU lattices. Although, the scheme is not supported by a formal security reduction, we present arguments for its security and derive concrete parameters based on the performance of state-of-the-art lattice reduction and enumeration techniques. PQCrypto 2014 Book: http://www.springer.com/computer/security+and+cryptology/book/978-3-319-11658-7 Workshop: https://pqcrypto2014.uwaterloo.ca/ Find out more about IQC! Website - https://uwaterloo.ca/institute-for-qu... Facebook - https://www.facebook.com/QuantumIQC Twitter - https://twitter.com/QuantumIQC

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: 2626933 CuriousInventor

01:08:14
Daniele Micciancio's August 13, 2013 lecture at the UCI Workshop on Lattices with Symmetry.

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Talk at eurocrypt 2012. Authors: Jean-S&eacute;bastien Coron, David Naccache, Mehdi Tibouchi. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=24255
Views: 390 TheIACR

21:22
Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you. This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy. Here's the link to our Python code (Python 2.7.6): https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py Here's the private key and the link to the public address that we use. Do you know why it is famous? Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E Public Address on Blockchain.info https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW Here's the private key we use at the end: 42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB Public Address on Blockchain.info https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe. Thanks, WBN
Views: 20947 CRI

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