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Search results “Bls algorithm in cryptography and network”
Digital Signatures
 
03:36
This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 37695 Udacity
Truly Anonymous Credentials Using Modern Cryptography - Matthew Di Ferrante
 
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When using anonymous networks like Tor or I2P, one problem is always how to prevent spam/DoS attacks when you cannot distinguish one entity from another, and hence cannot limit them without either compromising their anonymity by requiring registration of some kind, or requiring captcha-like challenges which are time consuming to implement and usually only a temporary solution at best. Here I introduce a new kind of authentication system based on homomorphic properties of elliptic curve cryptography and zero knowledge proofs called "Linkable Ring Signatures". It allows one to add their public key to a larger group of existing public keys, called a "ring", and sign using the entire "ring" of keys + private key in such a way that no one can tell which private key has signed the message, but can mathematically verify that it was one private key corresponding to one of the public keys in the ring. On top of that, it allows a verifier that only has access to the public keys in the ring to make sure that for any one [message, ring] pair, a private key has only signed it once - duplicate signatures for the same message are detectable. This allows for limiting interactions from any party holding one of these access keys (to say, one message per minute per key), without the party losing any anonymity as their signature is indistinguishable from any other party in the ring. Furthermore, because ring signatures use a cryptographic component called "zero knowledge proofs", signing reveals zero information about the private key - hence no matter how many signatures are generated, it is impossible to use them to try to forge messages or fingerprint/bruteforce the signer key. The proof of this will be shown in the talk. In this talk I will walk through the cryptographic primitives that make this possible, and show a demo service on Tor/I2P that implements this scheme to make an anti-spam anonymous forum.
Stanford Computer Forum: Applications of VRF by Dominic Williams (String Labs)
 
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Dominic Williams, CTO of String Labs, presents at Stanford Computer Forum on applications of Verifiable Random Function (VRF). = Abstract = We argue that a source of unmanipulable and unpredictable random values provides the most effective means to drive and organize decentralized networks and their higher-level applications. We demonstrate this idea by introducing two ingenious systems. Firstly we review how a network can use a “Threshold Relay” system that applies unique deterministic threshold signature cryptography (Dan Boneh’s BLS signature scheme) as a VRF to produce such a sequence of random values, further exploring how a robust high performance blockchain can be built upon the framework. Then we review how a network created using Threshold Relay can host “smart contract” software implementing an autonomous commercial banking system that applies generated randomness to give out loans algorithmically. String Labs is currently incorporating both methodologies into the DFINITY and Phi projects.
Views: 988 Tom Ding
0201718 SF Cryptocurrency Devs Presents : A Deep Dive into Chia Script and BLS Signatures
 
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James Prestwich, of Chia Network, introduces us to radical rework of scripting language for Chia Script with BLS Signatures. PDF Slides are available here: https://goo.gl/9GSXZ5
What is A Ethereum Dapp?
 
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What is A Blockchain Dapp? You'll receive $10 in free bitcoin by signing up with this link http://bit.ly/2oesV41 Bitcoin & Etherum Storage Wallet: http://bit.ly/2o7BmgW What is Dapp Guide: (Must Read) https://blockgeeks.com/guides/dapps-the-decentralized-future/ What are Dapps you might ask? Imagine having your car working away, transporting passengers while you’re at work. Imagine having your computer utilising its spare capacity to serve businesses and people across the globe. Imagine being paid for browsing the web and taking ownership of your, arguably invaluable, attention. Imagine the world like that. That world is not far away. A paradigm shift in the way we view software models is approaching. When Bitcoin, the first cryptocurrency, made us reassess our definition of Store of Value (SoV), it also revealed a sneak peek of the future: a world running on decentralized applications (Dapps). These distributed, resilient, transparent and incentivized applications will prove themselves to the world by remapping the technological landscape. Dapps And The Decentralized FutureSave Understanding Blockchain Before we can even fathom what Dapps do, we need to be familiar with its underlying technology—the blockchain. Put simply, a blockchain is a ledger of records organized in ‘blocks’ that are linked together by cryptographic validation. It is a digital storage of consensus truth. The key is to understand that this ledger is neither stored in a centralized location, nor managed by any single entity, hence its distributed-ness. The block validation system results in new transactions being added irreversibly and old transactions preserved forever for all to see, hence its transparency and resilience. Open-source software that leverage on the blockchain technology are called Dapps. Save The Birth of Decentralized Applications As the concept is still in its infancy, there might not be one definition of what a Dapp is. However, there are noticeable common features of Dapps: Open Source. Ideally, it should be governed by autonomy and all changes must be decided by the consensus, or a majority, of its users. Its code base should be available for scrutiny. Decentralized. All records of the application’s operation must be stored on a public and decentralized blockchain to avoid pitfalls of centralization. Incentivized. Validators of the blockchain should be incentivized by rewarding them accordingly with cryptographic tokens. Protocol. The application community must agree on a cryptographic algorithm to show proof of value. For example, Bitcoin uses Proof of Work (PoW) and Ethereum is currently using PoW with plans for a hybrid PoW/Proof of Stake (PoS)5 in the future. If we adhere to the above definition, the first Dapp was in fact Bitcoin itself. Bitcoin is an implemented blockchain solution that arose from problems revolving around centralization and censorship. One can say Bitcoin is a self-sustaining public ledger that allows efficient transactions without intermediaries and centralized authorities. The Ethereum Network While both Bitcoin and Ethereum may be loosely defined as Dapps aimed at solving real-world problems, Ethereum has a much bigger plan in mind. In Ethereum’s white paper, it was stated that the intention of Ethereum is to create an alternative protocol for building decentralized applications with emphasis on development time, security, and scaling. You may think of Ethereum as, for the lack of a better analogy, the Mother of Dapps. Armed with its very own language, Solidity, Ethereum enables developers to form smart contacts using the Turing-complete Ethereum Virtual Machine (EVM). With these tools available, developers made Dapps that have real-life use cases, ranging from asset management to resource planning. Examples of successful Ethereum-based Dapps that have achieved millions of dollars in market cap include Golem, Augur and Melonport. As I mentioned in my previous post, each of them aspires to rewire the economy using blockchain technology, and move us a step closer to a decentralised world. My name is Ameer Rosic, and I'm a serial entrepreneur, investor, marketing Strategist and Blockchain Evangelist Book Recommendations: http://amzn.to/2pv7kF4 Blockchain Training: http://bit.ly/2nGhdn0 Blog http://www.Ameerrosic.com Blockgeeks: http://www.blockgeeks.com Facebook http://www.Facebook.com/ameerrosic Twitter http://www.Twitter.com/ameerrosic InstaGram http://www.Instagram.com/ameerrosic
Views: 30795 Ameer Rosic
Stanford Computer Forum  Applications of VRF by Dominic Williams String Labs
 
01:12:31
Dominic Williams, CTO of String Labs, presents at Stanford Computer Forum on applications of Verifiable Random Function (VRF). = Abstract = We argue that a source of unmanipulable and unpredictable random values provides the most effective means to drive and organize decentralized networks and their higher-level applications. We demonstrate this idea by introducing two ingenious systems. Firstly we review how a network can use a “Threshold Relay” system that applies unique deterministic threshold signature cryptography (Dan Boneh’s BLS signature scheme) as a VRF to produce such a sequence of random values, further exploring how a robust high performance blockchain can be built upon the framework. Then we review how a network created using Threshold Relay can host “smart contract” software implementing an autonomous commercial banking system that applies generated randomness to give out loans algorithmically. String Labs is currently incorporating both methodologies into the DFINITY and Phi projects.
Views: 144 DFINITY
CompTIA Cyber Security Analyst CSA (CSO-001)  Secure Network Design
 
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Please support my channel by subscribing (Subscribe). With your continued support I will invest in better quality content and monthly prize drawings... Please check the video description for links for discounted services if applicable. NEW COURSE. CSA BOOTCAMP https://www.udemy.com/comptia-cybersecurity-analyst-csa-test-prep-bootcamp/?couponCode=YOUTUBE2017CSA Want some practice questions to ramp up for the exam at a discounted price! https://www.udemy.com/comptia-cybersecurity-analyst-csa-cert-practice-tests/?couponCode=YOUTUBECSAE2017 The CompTIA CSA Bootcamp is geared towards experienced IT Security pros to prepare for the CyberSecurity Analyst exam . This is an Intermediate level course and not meant for inexperienced IT Security professionals. This course has been condensed from a 5 Day which commercial and government customers pay thousands to attend,. This course has been condensed to about 2 days specifically for the Udemy audience. You will receive the same content PDF files from the five day course but your expected to research the toolsets that you may not be familiar with. I will not be providing tutorials on Snort, Bro, Metasploit, etc and expect this audience to know these. If your not familiar with any tools then you would need to be understanding of their features for this exam. Ive been teaching Cloud Security Manager, Security Plus, CASP and CSA to hundreds of Dept of Defense professionals. We will focus on getting you the information to pass the exam. CompTIA Cybersecurity Analyst (CSA+) is an international, vendor-neutral cybersecurity certification that applies behavioral analytics to improve the overall state of IT security. CSA+ validates critical knowledge and skills that are required to prevent, detect and combat cybersecurity threats. As attackers have learned to evade traditional signature-based solutions such as firewalls, an analytics-based approach within the IT security industry is increasingly important for most organizations. The behavioral analytics skills covered by CSA+ identify and combat malware, and advanced persistent threats (APTs), resulting in enhanced threat visibility across a broad attack surface. CompTIA CSA+ is for IT professionals looking to gain the following security analyst skills: Configure and use threat detection tools. Perform data analysis. Interpret the results to identify vulnerabilities, threats and risks to an organization. CSA+ certified skills are in-demand Properly trained IT security staff who can analyze, monitor and protect cybersecurity resources are in high demand. The U.S. Bureau of Labor Statistics (BLS) predicts that information security analysts will be the fastest growing overall job category, with 37 percent overall growth between 2012 and 2022. CSA+ is globally recognized CompTIA CSA+ is ISO/ANSI 17024 accredited and is awaiting approval by the U.S. Department of Defense (DoD) for directive 8140/8570.01-M requirements. CSA+ provides substantial earnings potential A career in information security analysis ranked seventh on U.S. News and World Report’s list of the 100 best technology jobs for 2017. According to the Bureau of Labor Statistics, the median pay for an information security analyst is $90,120 per year. CSA+ is industry supported CSA+ is developed and maintained by leading IT security experts. Content for the exams stems from a combination of industry-wide survey feedback and contributions from our team of subject matter experts. Get CompTIA Certified The CompTIA CSA Bootcamp is geared towards experienced IT Security pros to prepare for the CyberSecurity Analyst exam . This is an Intermediate level course and not meant for inexperienced IT Security professionals. This course has been condensed from a 5 Day which commercial and government customers pay thousands to attend,. This course has been condensed to about 2 days specifically for the Udemy audience. You will receive the same content PDF files from the five day course but your expected to research the toolsets that you may not be familiar with. I will not be providing tutorials on Snort, Bro, Metasploit, etc and expect this audience to know these. If your not familiar with any tools then you would need to be understanding of their features for this exam. Ive been teaching Cloud Security Manager, Security Plus, CASP and CSA to hundreds of Dept of Defense professionals.
SF Crypto Devs Presents Chia Deep Dive pt 2: Proof of Space & Time w/ Bram Cohen
 
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How to build a secure proof of space blockchain with only three new cryptographic primitives. • What is Proof of Space • What are the three cryptographic primitives needed • A deep introduction to Chia Network Slides: https://goo.gl/sYJSyJ
Digital signature
 
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A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or document. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, such that the sender cannot deny having sent the message (authentication and non-repudiation) and that the message was not altered in transit (integrity). Digital signatures are commonly used for software distribution, financial transactions, and in other cases where it is important to detect forgery or tampering. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 218 Audiopedia
Electronic Signature  High impact Strategies   What You Need to Know  Definitions  Adoptions  Impact
 
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https://store.theartofservice.com/electronic-signature-high-impact-strategies-what-you-need-to-know-definitions-adoptions-impact-benefits-maturity-vendors.html Code defines an electronic signature for the purpose of US law as an electronic sound, symbol, or process, attached to or logically associated with a contract or other record and executed or adopted by a person with the intent to sign the record. ...In easy to read chapters, with extensive references and links to get you to know all there is to know about Electronic Signature right away, covering: Electronic signature, Cryptography, Outline of cryptography, 1dl, Anonymous veto network, Array controller based encryption, Authenticated encryption, Authorization certificate, Autokey cypher, Avalanche effect, Averaging argument, Backdoor (computing), Bent function, Bigram, BLACKER, Blind credential, Blind signature, Blinding (cryptography), Block design, Block size (cryptography), Blom's scheme, BLS (cryptography), Blum-Micali algorithm, Boneh/Franklin scheme, Boolean function, Brown fox code, Burrows-Abadi-Needham logic, Bus encryption, Byzantine fault tolerance, Cardan grille, Chaocipher, Cipher, Cipher runes, Ciphertext, Ciphertext expansion, Ciphertext indistinguishability, Civision, Client-Side Encryption, Clipper chip, Cocks IBE scheme, Code (cryptography), Code word, Codebook, Codress message, Collision resistance, Commitment scheme, Communications security, Comparison of cryptographic hash functions, Completeness (cryptography), Compromise, Computer insecurity, Concrete security, Confusion and diffusion, Conjugate coding, Correlation attack, Correlation immunity, Cover (telecommunications), Cover-coding, Critical Security Parameter, Crypto-politics, Cryptochannel, Cryptographic engineering, Cryptographic hash function, Cryptographic nonce, Cryptographic Service Provider, Cryptographic Test Correction, Portal:Cryptography, CrypTool, Cryptosystem, Cryptovirology, Decipherment, Deniable encryption, Designated verifier signature, Deterministic encryption, Digital credential, Digital signature, Digital signature forgery, Dining cryptographers problem, Diplomatic bag, Direct Anonymous Attestation, Discrete logarithm, EFF DES cracker, Elliptic curve cryptography, Encrypted function, Encryption, End-to-end encryption, Enigma machine, Entropic security, Ephemeral key, Factorization of polynomials over a finite field and irreducibility tests, Feedback with Carry Shift Registers, File camouflage, Floradora...and much more.
Views: 107 TheArtofService
Computer engineering
 
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Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to develop computer hardware and software. Computer engineers usually have training in electronic engineering (or electrical engineering), software design, and hardware-software integration instead of only software engineering or electronic engineering. Computer engineers are involved in many hardware and software aspects of computing, from the design of individual microprocessors, personal computers, and supercomputers, to circuit design. This field of engineering not only focuses on how computer systems themselves work, but also how they integrate into the larger picture. Usual tasks involving computer engineers include writing software and firmware for embedded microcontrollers, designing VLSI chips, designing analog sensors, designing mixed signal circuit boards, and designing operating systems. Computer engineers are also suited for robotics research, which relies heavily on using digital systems to control and monitor electrical systems like motors, communications, and sensors. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 129 Audiopedia
Computer engineering
 
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Computer engineering is a discipline that integrates several fields of electrical engineering and computer science required to develop computer hardware and software. Computer engineers usually have training in electronic engineering , software design, and hardware-software integration instead of only software engineering or electronic engineering. Computer engineers are involved in many hardware and software aspects of computing, from the design of individual microprocessors, personal computers, and supercomputers, to circuit design. This field of engineering not only focuses on how computer systems themselves work, but also how they integrate into the larger picture. This video targeted to blind users. Attribution: Article text available under CC-BY-SA Public domain image source in video
Views: 79 encyclopediacc
Harvard University Commencement 2017 Morning Exercises
 
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The Morning Exercises at Harvard's 366th Commencement at Tercentenary Theatre on May 25, 2017. For more information, visit http://news.harvard.edu/gazette/story/topic/commencement-2017/.
Views: 50997 Harvard University
Economics Part 5: Unemployment (Second Edition)
 
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Part 5 of a 5-part series covering the basics of economics. This updated edition has HD video and more information.
Views: 1140 Shane Killian
Privacy, Security, Society - Computer Science for Business Leaders 2016
 
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Apple versus FBI; encryption; Dropbox.
Views: 45243 CS50
Coinscrum {minicon} DFINITY CTO Dominic Williams (Slides linked below)
 
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Coinscrum {mini-con} : w/ DFINITY Chief Scientist Dominic Williams Click here to follow presentation slides https://www.slideshare.net/secret/CSEeuZc8m5HnLp http://www.coinscrum.com/ Recorded by Proof of Work Media London 2017 Follow Coinscrum: https://twitter.com/coinscrum Tip BTC: 1EJDArq3Ye1wi9gdSC1hgFuZYkK15DVuQn
Views: 165 Coinscrum
Week 8, continued
 
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Views: 21511 CS50