Hello Dosto Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare. Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love #TechnicalSagar LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- For all updates : SUBSCRIBE Us on Technical Sagar : www.youtube.com/technicalsagarindia LIKE us on Facebook https://www.facebook.com/technicalsagarindia Follow us on Twitter : http://www.twitter.com/iamasagar
Views: 91602 Technical Sagar
How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 195139 Simply Explained - Savjee
Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Thread for Q&A questions: http://3b1b.co/questions Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives a desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 992419 3Blue1Brown
Kerberos in Hindi – Network Authentication Protocol, KDC, AS, TGS 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
Views: 69538 Easy Engineering Classes
The recent TLS 1.3 protocol mandates that Authenticated Encryption with Associated Data (AEAD) Ciphers be used for bulk encryption. As web servers and browsers transition to using these ciphers, it's important to know what they are and how they work. In this video, John discusses the details of AEAD Ciphers and which ones you can use to implement on your web server. https://devcentral.f5.com/articles/lightboard-lessons-what-are-aead-ciphers-31349
Views: 3351 F5 DevCentral
Learn different types of firewall, types of firewall software, types of hardware firewall, different types of firewalls, types of firewalls, types firewall, types of firewalls in network security, different types of hardware firewalls, types of firewall, different types of firewall, firewall configuration types, firewall types, 7 types of firewall, types of firewall in network security, types of firewall with diagram, firewall and types of firewall, types of network firewalls, firewall and its types, what is firewall and types of firewall, types of firewall architecture, types of firewall in networking, different types of firewall in network security, what is firewall and write the types of firewall, types of firewall attacks, firewall and types, firewall types and configuration, different types of firewalls and their functions. Follow us on Facebook: https://www.facebook.com/DGTechTerms/ Follow us on Twitter: https://twitter.com/Technical_Terms Firewalls protect our computers from internet hackers. Internet hackers can steal our bank details from our computers and can reduce our bank balance from 1000s of dollars to 0 in seconds. So, firewall is must in a computer / computer network. Starting with packet filtering firewall. Suppose, I am downloading a file from internet. When the data-packet arrives a packet-filtering firewall, it only checks sender’s and receiver’s IP address and the port number. If the everything is OK, then data packet is allowed to pass through packet-filtering firewall and then to my computer. This checking process is done as per rules written in a list called access control list. The only limitation (caveats) of packet filtering firewall is that it do not checks the data portion, i.e. Payload, of the data packet. So, a hacker could send some malicious data packed in this payload section. The 2nd one is application / proxy firewall: proxy firewall do not let the web server know which computer actually wants to visit the requested website, i.e. proxy firewall hides us from the attackers in internet. Since, the application firewalls also check the data contents of the received data packet so they are generally much slower than packet-filtering firewalls. 3rd is Hybrid firewalls: Hybrid firewalls combines packet filtering firewall and application firewall in series to enhance the security. If they are connected in parallel then the security of the connection will be reduced to the parameters defined by the packet filtering firewall, i.e. application firewall will be of no use if the two firewalls are connected in parallel. For this reason, hybrid firewalls use packet filtering and application firewall in series. -~-~~-~~~-~~-~- Please watch: "Computer Network Administrator – 5 Important Questions and answers" https://www.youtube.com/watch?v=4mKcQ1_vQjc -~-~~-~~~-~~-~-
Views: 236164 TechTerms
UCL Computer Science Distinguished Lecture A common theme in program verification is establishing relationships between two runs of the same program or of different programs. Such relationships can be proved by semantical means, or with syntactic methods such as relational program logics and product constructions. Gilles shall present an overview of these methods and their applications to provable security, differential privacy, and secure implementations. Gilles Barthe is a research professor at the IMDEA Software Institute. His research interests include logic, formal verification, programming languages, and security. His current work focuses on verification and synthesis methods for cryptography and differential privacy. He is a member of the editorial boards of the Journal of Automated Reasoning and Journal of Computer Security. He received a Ph.D. in Mathematics from the University of Manchester, UK, in 1993, and an Habilitation à diriger les recherches in Computer Science from the University of Nice, France, in 2004.
Views: 282 UCLComputerScience
Hacking is hard. It takes passion, dedication, and an unwavering attention to detail. Hacking requires a breadth of knowledge spread across many domains. We need to have experience with different platforms, operating systems, software packages, tools, programming languages, and technology trends. Being overly deficient in any one of these areas can add hours to our hack, or even worse, bring us total failure. And while all of these things are important for a well-rounded hacker, one of the key areas that is often overlooked is cryptography. In an era dominated by security breaches, an understanding of encryption and hashing algorithms provides a tremendous advantage. We can better hone our attack vectors, especially when looking for security holes. A few years ago I released the first Blu-Ray device key, AA856A1BA814AB99FFDEBA6AEFBE1C04, by exploiting a vulnerability in an implementation of the AACS protocol. As hacks go, it was a simple one. But it was the knowledge of crypto that made it all possible. This presentation is an overview of the most common crypto routines helpful to hackers. We'll review the strengths and weaknesses of each algorithm, which ones to embrace, and which ones to avoid. You'll get C++ code examples, high-level wrapper classes, and an open-source library that implements all the algorithms. We'll even talk about creative ways to merge algorithms to further increase entropy and key strength. If you've ever wanted to learn how crypto can give you an advantage as a hacker, then this talk is for you. With this information you'll be able to maximize your hacks and better protect your personal data. Speaker Bio: Eijah is the founder of demonsaw, a secure and anonymous content sharing platform, and a Senior Programmer at a world-renowned game development studio. He has over 15 years of software development and IT Security experience. His career has covered a broad range of Internet and mid-range technologies, core security, and system architecture. Eijah has been a faculty member at multiple colleges, has spoken about security and development at conferences, and holds a master’s degree in Computer Science. Eijah is an active member of the hacking community and is an avid proponent of Internet freedom.
Views: 47992 DEFCONConference
Hey there guys! Today we've got an especially useful class. When talking about privacy in cryptocurrency, Zero Knowledge Proofs come up a lot. Weirdly though, not a lot of people can describe them. So today, we challenge that with a super easy analogy. As always, comment below if something doesn't make sense! Sources: https://blog.cryptographyengineering.com/2014/11/27/zero-knowledge-proofs-illustrated-primer/ https://en.wikipedia.org/wiki/Zero-knowledge_proof https://en.wikipedia.org/wiki/Zerocoin @Presstab Thank you to the PIVX community for your ongoing support. Special thanks to Veramis for his script editing work and to Hanna for leading the translation efforts. You both rock! Discord: https://discordapp.com/invite/jzqVsJd Twitter: https://twitter.com/_pivx Reddit: https://www.reddit.com/r/pivx/ Facebook: https://www.facebook.com/PIVXCrypto/ Instagram: https://www.instagram.com/pivxcrypto/ Pinterest: https://www.pinterest.ca/pivxorg/ PIVXfans: https://pivxfans.fancorps.com/ Steemit: https://steemit.com/@pivx/ Source: https://www.reddit.com/r/pivx/wiki/coin_supply DISCLAIMER: This channel is funded by the PIVX DAO's budget system. Every month it is voted in to be funded an amount that can be viewed on our proposal tracking sites. I make no attempts to hide this and I do my best to be un-bias in non-opinion segments.
Views: 5800 PIVX Class
www.hiteshChoudhary.com www.newdemy.com What is Cryptography? Cryptography is a very interesting science of information security. The word Cryptography is derived from Greek kryptos, meaning hidden. Cryptography is not alone word or one word for all related information security science. Words like cryptanalysis, cipher and cryptology are always included in this science. Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit. However, in today's computer-centric world, cryptography is most often associated with scrambling plaintext (ordinary text, sometimes referred to as clear text) into cipher text (unreadable text obtained after a process called encryption), then back again (known as decryption). Individuals who practice this field are known as cryptographers. There is also a word, Cryptosystem that you will see a lot in this video course. Procedures and protocols that are used in cryptography makes up a system that is known as cryptosystem. Cryptosystem are mostly referred as computer programs or protocols but I would like it to extend to a much wider plot. It also include human behavior as social engineering is still one of the fastest technique to compromise a system or application. Things like choosing typical password, logging off unused systems, protecting sensitive files also plays a vital role in cryptosystem. Although, it is considered that 1st use of modern cryptography was by Julius Caesar, who did not trust his messenger when communicating with his governors. But I think the need of encryption came in high demand after the invention of radio as one can tune into your frequency range and intercept your message. But if the transmission is encrypted then things get changed. In recent times, cryptography has turned into a battleground of some of the world's best mathematicians and computer scientists. The ability to securely store and transfer sensitive information has proved a critical factor in success in war and business. To understand more about cryptography, let’s call our friends Alice and Bob. Now Alice wants to transfer some information to Bob but wants to do it securely. Alice decided that instead of transferring information in clear text form, I’ll encrypt this text with some algorithm and key. Then I’ll pass this cipher text. Now bob should also have the key and decryption algorithm to read the information. The two major problems are secure transfer of key and knowledge about algorithm. Things like degree of complexity of algorithm and its randomness also plays a vital role in cryptography. This course is going to be a detailed overview about all these things.
Views: 3765 Hitesh Choudhary
by Ron Garret Bay Area Lisp and Scheme Meetup http://balisp.org/ Sat 30 Apr 2016 Hacker Dojo Mountain View, CA Abstract This will be a beginner’s introduction to elliptic curve cryptography using Lisp as a pedagogical tool. Cryptography generally relies heavily on modular arithmetic. Lisp’s ability to change the language syntax and define generic functions provides opportunities to implement modular arithmetic operations much more cleanly than other languages. Video notes The audio for the introduction and for the questions from the audience is hard to hear. I will try to improve on that in the next batch of talks. — Arthur
Views: 3394 Arthur Gleckler
There is no cloud — it's just someone else's computer. And you're storing all sorts of sensitive data on it, blindly trusting that this computer will only allow access to authorised users. What if it is compromised? End-to-end encryption avoids having to trust the servers. Although PGP/GPG encrypted email never went mainstream, secure messaging apps like WhatsApp, Signal and iMessage have shown that it is feasible for millions of people to use end-to-end encryption without being security experts. But how do these protocols actually work? In this talk, we will dig into the details of secure messaging protocols — to understand the threats against which they defend, and how cryptographic operations are combined to implement those defences in the protocol. If you have ever wondered what "forward secrecy" means, how key exchange works, or how protocols can ensure you're communicating with the right person (not an impostor like a "man in the middle"), this talk will clear things up. We will also look at taking end-to-end encryption to other areas beyond instant messaging. What would it take to build an end-to-end secure version of Google Docs, for example?
Views: 6251 Strange Loop
Walkthrough of Diffie-Hellman Key Exchange Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/intro-to-rsa-encryption?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/discrete-logarithm-problem?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: 223503 Khan Academy Labs
In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 23499 Simple Snippets
Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - If you can’t hack the user, you may be able to hack the cryptography. In this video, you’ll learn about some common cryptographic attacks. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 41637 Professor Messer
This is a introductory video to a domain of Information technology that is Network security. Definition of Network Security: Network security is protection of the access to files, directories and information in a computer network against hacking, misuse and unauthorized changes to the system. In this video tutorial the basics of Network security, some definitions, terms and concepts. We've also covered some types of attacks that take place when Network security is not implemented properly. If you like the video give it a thumbs up and also share it with your friends. Do subscribe to our channel as you will get notified when we upload new video tutorials. If you have any suggestions or tips for us do post them in the comments section below we'll be happy to apply them for you. Peace Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 133529 Simple Snippets
Most working engineers view machine-checked mathematical proofs as an academic curiosity, if they have ever heard of the concept at all. In contrast, activities like testing, debugging, and code review are accepted as essential. They are woven into the lives of nearly all developers. In this talk, I will explain how I see machine-checked proofs enabling new everyday activities for developers of computer software and hardware. These activities have the potential to lower development effort dramatically, at the same time as they increase our assurance that systems behave correctly and securely. I will give a cosmological overview of this field, answering the FAQs that seem to stand in the way of practicality; and I will illustrate the principles with examples from projects that you can clone from GitHub today, covering the computing stack from digital hardware design to cryptographic software and applications. Today's developers of computer software and hardware are tremendously effective, compared to their predecessors. We have found very effective ways of modularizing and validating our work. The talk is about ammunition for these activities from a perhaps-unexpected source. Modularity involves breaking a complex system into a hierarchy of simpler pieces, which may be written and understood separately. Structured programming (e.g., using loops and conditionals instead of gotos) helps us read and understand parts of a single function in isolation, and data abstraction lets us encapsulate important functionality in objects, with guarantees that other code can only access the private data by calling public methods. That way, we can convince ourselves that the encapsulated code upholds certain essential properties, regardless of which other code it is linked with. Systematic unit testing also helps enforce contracts for units of modularity. Each of these techniques can be rerun automatically, to catch regressions in evolving systems, and catch those regressions in a way that accurately points the finger of responsibility to particular modules. Validation is an important part of development that encompasses testing, debugging, code review, and anything else that we do to raise our confidence that the system behaves as intended. Experienced engineers know that validation tends to take up the majority of engineering effort. Often that effort involves mentally taxing activities that would not otherwise come up in coding. One example is thinking about test-case coverage, and another is including instrumentation that produces traces to consult during debugging. It is not hard for working developers to imagine great productivity gains from better ways to break systems into pieces or raise our confidence in those pieces. The claim I will make in this talk is that a key source of such insights has been neglected: machine-checked mathematical proofs. Here the basic functionality is an ASCII language for defining mathematical objects, stating theorems about them, and giving proofs of theorems. Crucially, an algorithm checks that purported proofs really do establish the theorems. By going about these activities in the style of programming, we inherit usual supporting tools like IDEs, version control, continuous integration, and automated build processes. But how could so esoteric a task as math proofs call for that kind of tooling, and what does it have to do with building real computer systems? I will explain a shared vision to that end, developed along with many other members of my research community. Let me try to convince you that all of the following goals are attainable in the next 10 years. We will have complete computer systems implementing moderately complex network servers for popular protocols, proved to implement those protocols correctly, from the level of digital circuits on up. We will remove all deployed code (hardware or software) from the trusted computing base, shifting our trust to much smaller specifications and proof checkers. Hobbyists will be able to design new embedded computing platforms by mixing and matching open-source hardware and software components, also mixing and matching the proofs of these components, guaranteeing no bugs at the digital-abstraction level or higher, with no need for debugging. New styles of library design will be enabled by the chance to attach a formal behavioral specification to each library. For instance, rank-and-file programmers will able to assemble their own code for cryptographic protocols, with code that looks like reference implementations in Python, but getting performance comparable to what experts handcraft in assembly today. Yet that benefit would come with no need to trust that library authors have avoided bugs or intentional backdoors, perhaps even including automatic proofs of cryptographic security properties. Adam Chlipala https://fahrplan.events.ccc.de/congress/2017/Fahrplan/events/9105.html
Views: 1441 media.ccc.de
Security Specialist Location Sacramento CA Duration 6 months /Contract Contact: Talent Anytime Inc. 41041 Trimboli way suite 1398 Fremont CA 94538 CA 94539 Contact# : 510-722-8503 x 533 Direct : 510-455-8178 JOB DESCRIPTION Mode of interview: Phone and Skype Visa: USC/GC/EAD/OPT/TN The Security Specialist safeguards information system assets by identifying and solving potential and actual security problems. Main Responsibilities for Security Specialist Analyze and establish security requirements for your systems/networks Defend systems against unauthorized access, modification and/or destruction Configure and support security tools such as firewalls, anti-virus software, patch management systems, etc. Define access privileges, control structures and resources Perform vulnerability testing, risk analyses and security assessments Identify abnormalities and report violations Oversee and monitor routine security administration Develop and update business continuity and disaster recovery protocols Train fellow employees in security awareness, protocols and procedures Design and conduct security audits to ensure operational security Respond immediately to security incidents and provide post-incident analysis Research and recommend security upgrades Provide technical advice to colleagues Familiarity skills are preferred (e.g. knowledge of C, C++, C#, Java or PHP programming languages) Familiarity with security frameworks (e.g. NIST Cybersecurity framework) and risk management methodologies PCI, HIPAA, NIST, GLBA and SOX compliance assessments Knowledge of patch management, firewalls and intrusion detection/prevention systems (e.g. TippingPoint) Familiarity with public key infrastructure (PKI) and cryptographic protocols (e.g. SSL/ TLS) IDS/IPS, penetration and vulnerability testing TCP/IP, computer networking, routing and switching DLP, anti-virus and anti-malware Firewall and intrusion detection/prevention protocols Secure coding practices, ethical hacking and threat modeling Windows, UNIX and Linux operating systems Outstanding communication and organization skills BSc/BA in Computer Science, Information Technology or a related field; professional certification (e.g. CompTIA Security+, CISSP) is a plus Technical Skills and Requirements for Security Specialist Familiarity skills are preferred (e.g. knowledge of C, C++, C#, Java or PHP programming languages) Familiarity with security frameworks (e.g. NIST Cybersecurity framework) and risk management methodologies PCI, HIPAA, NIST, GLBA and SOX compliance assessments Knowledge of patch management, firewalls and intrusion detection/prevention systems (e.g. TippingPoint) Familiarity with public key infrastructure (PKI) and cryptographic protocols (e.g. SSL/ TLS) IDS/IPS, penetration and vulnerability testing TCP/IP, computer networking, routing and switching DLP, anti-virus and anti-malware Firewall and intrusion detection/prevention protocols Secure coding practices, ethical hacking and threat modeling Windows, UNIX and Linux operating systems Outstanding communication and organization skills BSc/BA in Computer Science, Information Technology or a related field; professional certification (e.g. CompTIA Security+, CISSP) is a plus
Views: 571 ConvoCourses
Public key cryptography, and establishing a secure channel, explained using physical means. Note: this is the first teaching video i've put together that was entirely recorded and edited on my phone so it's a bit rough around the edges, but I think it works.
Views: 2987 hannah dee
http://CppCon.org Niek J. Bouman “Multi-Precision Arithmetic for Cryptology in C++, at Run-Time and at Compile-Time” — Presentation Slides, PDFs, Source Code and other presenter materials are available at: https://github.com/CppCon/CppCon2018 — In the talk, I will present a new C++17 library for multi-precision arithmetic for integers in the order of 100--500 bits. Many cryptographic schemes and applications, like elliptic-curve encryption schemes and secure multiparty computation frameworks require multiprecision arithmetic with integers whose bit-lengths lie in that range. The library is written in “optimizing-compiler-friendly” C++, with an emphasis on the use of fixed-size arrays and particular function-argument-passing styles (including the avoidance of naked pointers) to allow the limbs to be allocated on the stack or even in registers. Depending on the particular functionality, we get close to, or significantly beat the performance of existing libraries for multiprecision arithmetic that employ hand-optimized assembly code. Beyond the favorable runtime performance, our library is, to the best of the author’s knowledge, the first library that offers big-integer computations during compile-time. For example, when implementing finite-field arithmetic with a fixed modulus, this feature enables the automatic precomputation (at compile time) of the special modulus- dependent constants required for Barrett and Montgomery reduction. Another application is to parse (at compile-time) a base-10-encoded big-integer literal. In this talk, I will focus on some Modern C++ language features that I've used to write the library and design its API (e.g., std::array, variadic templates, std::integer_sequence, constexpr, user-defined literals, using-declarations and decltype, and combinations thereof). Also, I will show some benchmarks, and will argue that the integer types offered by the library compose well with STL containers or other libraries (like Eigen for matrix/linear algebra operations). I will also present some results on formal verification of correctness and the "constant-time" property: - Correctness is verified using a tool named SAW (Software Analysis Workbench), which tries to prove equivalence between the compiled C++ code (represented as LLVM bitcode) and a behavioral specification given in a high-level functional language; - "Constant-timeness" is a property that is crucial for implementations of cryptographic protocols to prevent timing attacks. In particular, I succeeded to verify my C++ code with "ct-verif", a tool for verifying the constant-time property for C programs (which was, in its original form, incompatible with C++ due to usage of non-ANSI C in one of its header files) The library is on Github (Apache 2 licensed) https://github.com/niekbouman/ctbignum — Niek J. Bouman, Eindhoven University of Technology Researcher Secure Multiparty Computation 2017 - now Postdoc TU/e SODA (Scalable Oblivious Data Mining) project, Eindhoven University of Technology, the Netherlands 2016-2017 Senior Researcher Fraud Detection @ ABN AMRO Bank, Amsterdam, the Netherlands 2014-2016 Postdoc at Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland PhD (2012) Quantum Cryptography/Quantum Information Theory from CWI/Universiteit Leiden, the Netherlands BS'05 MS’07 Electrical Engineering from Universiteit Twente, Enschede, the Netherlands — Videos Filmed & Edited by Bash Films: http://www.BashFilms.com
Views: 1451 CppCon
Find the notes of Cyber Security Access Control Authentication Authorization on this link - https://viden.io/knowledge/cyber-security-access-control-authentication-auth?utm_campaign=creator_campaign&utm_medium=referral&utm_source=youtube&utm_term=ajaze-khan-1
Views: 19790 LearnEveryone
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: 33814 Ameer Rosic
What is http and https this is what I am going to explain you in Hindi. HTTP is Hyper Text Transfer protocol that is used in networking. Whenever basically you type a website in the browser, it is this protocol which by default listens at port 80 on server side and helps you to see the webpage on your machine. HTTPS or Secure HTTP some may call it is a combination of Hypertext Transfer Protocol (HTTP) with SSL/TLS protocol. Now everything you communicate over HTTPS will be sent and received in encrypted form, which adds the element of safety. As when a client makes a request to the server, the server responds by offering a list of encryption methods. When the client connects to a website via HTTPS, the website encrypts the session with a digital certificate. Secure Sockets Layer or SSL uses a cryptographic system that encrypts data with two keys that is browser and server send each other unique codes which are used for encryption for rest of the talk. HTTP HTTPS URL begins with “http://” URL begins with “https://” It uses port 80 for communication It uses port 443 for communication Unsecured Secured Operates at Application Layer Operates at Transport Layer No encryption Encryption is present No certificates required Certificates required Please watch the complete video for proper understanding. ----------------------------------------------------------------------------------------------------------- My ebook Real Ways to Make Money Online - E-book (Lifetime Free updates) (Rs.149) : https://goo.gl/oB95Pt Donate us to Keep Motivated paypal.me/techbulu Products I use Samson Go Mic: https://amzn.to/2LoefhP Pop filter: https://amzn.to/2uyZRJR Microsoft Office 365: https://amzn.to/2JBVP8y My phone: https://amzn.to/2uMuwCV Desktop : https://amzn.to/2JCe5yF Digital Pen: https://amzn.to/2LpvCin Share, Support, Subscribe!!! Youtube: https://www.youtube.com/c/TECHBULU Twitter: https://twitter.com/techbulu Facebook: https://www.facebook.com/techbulu/ Pinterest: https://www.pinterest.com/techbulu/ Google Plus: https://goo.gl/sZhdc0 Linkedin: https://www.linkedin.com/in/tech-bulu-15834b140/ BlogSite: http://www.techbulu.com/ About Us: TECHBULU is a YouTube Channel, where you will find technical and education videos. -----------------------------------------------------------------------------------------------------------
Views: 20598 TECH BULU
Go is the language of API servers, of protocols and of network daemons. And while sometimes the standard library provides all the abstractions we need, that means interacting with net.Conn. Thanks to the freedom of blocking goroutines, Go developed its own patterns in interacting with asynchronous networking. In Filippo’s tutorial session, he will go over some of the most common, useful or tricky patterns, with examples from the standard library and other popular projects. First, he will look at the basic interaction of goroutines with net.Listener, the accept loop, and spawning servicing goroutines. Next, Filippo will focus on how to manage and schedule resources. Finally, he will look at how to test, benchmark, and extend net.Conn implementations by wrapping them. By the end, this session should give you an understanding of what is going on in packages like net/http and crypto/tls, or what you need to keep in mind while developing network protocol implementations.
Views: 4666 Gopher Academy
This is a free sample lesson from 'How To Confidently Join The Digital Money Revolution - Master the basics of Bitcoin and own a stake in the future of money'. This is an online course available through Cryptoversity.com. You can sign up for the full course at: https://www.cryptoversity.com/courses/the-digital-money-revolution/ What is Cryptography? Digital Money Revolution Bitcoin is... An open source software protocol which enables a blockchain to be built on a trustless peer to peer decentralised network via the Internet, which can be used to host a public database which tracks changes in ownership of assets and is secured by cryptography and consensus. A bitcoin is... A unit of digital currency that exists on the Bitcoin blockchain, is stored in a wallet and can be used to track the exchange of value in a free market economy. Digital Money Revolution - What is Cryptography? Think about Pig Latin... Typically used by children to communicate with their brothers and sisters without their parents being able to understand. A way of communicating in secret by converting the message into a secret format It’s a way of making a message appear meaningless unless you know how to interpret it Digital Money Revolution - What is Cryptography? Pig Latin Rules... Take the first consonant (or consonant cluster) of an English word, move it to the end of the word and add ‘ay’ So ‘pig’ becomes ‘igpay’ If a word begins with a vowel you just add ‘way’ to the end So ‘apple’ becomes ‘appleway’ Digital Money Revolution - What is Cryptography? An Example Ellohay ymay amenay isway ischray andway elcomeway otay ethay igitalday oneymay evolutionray. Digital Money Revolution - What is Cryptography? Hello my name is Chris and welcome to the Digital Money Revolution. The Pig Latin rules are called the encryption key. Summary Encryption is used to scramble a message so that it looks meaningless while it’s travelling Unless you know the encryption key there’s no way to know what the original message was You may not even know what format the original message was in (numbers, images, words, language) These elements may not even be included in the encrypted message If the type of encryption became less secure (say because of new computer technology), Bitcoin is open source Hence a newer type of encryption (maybe one that hasn’t even been invented yet) could be proposed, agreed on and implemented
Views: 1872 The Cryptoverse
From the CISR video library (http://www.cisr.us) John Launchbury, Ph.D., President and CEO, Galois Connections Inc. Cryptol in Future Cryptographic Evaluations February 16, 2006 at the Naval Postgraduate School (http://www.nps.edu) ABSTRACT With growing demand, the next generation of cryptographic devices is required to be programmable and to attain throughput speeds of many gigabits per second. Devices that meet both of these requirements threaten to stress the evaluation process to breaking point. Working through Galois, the NSA is pursuing a fresh approach to the cryptographic evaluation problem by developing tools based around Cryptol, a formal cryptography specification language. The tools provide capabilities to generate FPGA implementations automatically from high level mathematical specifications, to generate test vectors and other aids for human developers, and to verify implementations formally against their specifications. This talk will explore the world of Cryptol, and provide insights into how formal techniques can be packaged to make them fully available to non-specialists. Bio: John Launchbury founded Galois in 1999 to address challenges in Information Assurance through the application of Functional Programming and Formal Methods. The company has grown through successes on multiple contract awards for U.S. Government customers, and gained stature for its advanced technology development. John received First Class Honours in Mathematics from Oxford University in 1985. His Ph.D. in Computing Science won the British Computer Society's distinguished dissertation prize. John retains status as a full professor of Computer Science and Engineering, currently on extended entrepreneurial leave from the OGI School of Science and Engineering at OHSU. John's teaching style has earned him awards for outstanding teaching at OGI, and his work on Haskell and on the semantics of programming languages is internationally recognized.
Views: 506 securitylectures
Digital Certificate Introduction, PKI, Certificate Authority Lecture in Hindi Keywords: Digital Certificate PKI Certificate Authority
Views: 45531 Easy Engineering Classes
Proofs in Cryptography Lecture 3 Reduction Proofs - What are they? ALPTEKİN KÜPÇÜ Assistant Professor of Computer Science and Engineering Koç University http://crypto.ku.edu.tr
Views: 2322 KOLT KU
What Is Public Key Cryptography? What is encryption encryption-kya-hota-hai ╔╦╦╦═╦╗╔═╦═╦══╦═╗☆ ║║║║╩╣╚╣═╣║║║║║╩╣TO My Channel ╚══╩═╩═╩═╩═╩╩╩╩═╝☆ Subscribe my channel like videos comment below any query to Subscribe Us & Comment:- https://goo.gl/FJ1nWJ Follow On social site © original channel ██║▌│║║█║█║▌║║█║▌│ █ __/LINKS\_ ► Facebook:➜ http://facebook.com/techvideoguru ► Twitter:➜ https://mobile.twitter.com/techvideoguru ► Google+:➜ https://plus.google.com/u/0/107344256878607670469 ► Website:➜ http://techvideoguru.mobi ►Youtube:-https://www.youtube.com/techvideoguru ►Blog:-http://techvideoguru.blogspot.in ►Instagram:-https://www.instagram.com/techvideoguru/ ►Pinterest:- https://www.pinterest.com/techvideoguru/ ►Dailymotion:-http://www.dailymotion.com/techvideoguru ►LinkedIn:-https://in.linkedin.com/in/vikas-kumar-maurya-27262b78 ================================================ ╔══════════════════════╗ __|Watch More Videos|_ https://goo.gl/FJ1nWJ ╚══════════════════════╝
Views: 66333 TechVideo Guru
Cryptocurrency an entity of the virtual world is built using blockchain technology which is nothing but an array of protocols in the cryptographic language, a code which is extremely complex in its characteristics specifically scripted to provide secure and non-decrypt able data transfers. The minds behind this rely eminently on the use of advanced mathematics, and complicated computer engineering theories to curtail and render cracking each segment next to impossible. Not only do they maintain a barrier which is impossible to break, they have the ability to mask the user’s identity, which makes each and every transaction extremely personal and hides the attributes to the person or groups as concerned. Further, the concept of Cryptocurrency has been moulded into its fine structure by the mechanism of de-centralised control, which simply means that the whole innovation is not marked by a single server, rather all the networking components of the entity is handled by the respective users and is expected to do its job with smoother functioning and maintaining a perfect stability. (In words of Dr. Parag Diwan) Follow Dr. Parag Diwan - https://www.facebook.com/Dr-Parag-Diwan-182570895677388/ This video is an original work by Mirage Production | An initiative by Gyanish Roy ( https://www.facebook.com/gyanish.roy/ ) in association with Paradigm Consultants & Resource Management ( https://www.facebook.com/PCRMPL/?timeline_context_item_type=intro_card_work&timeline_context_item_source=608833269 )
Views: 133 Gyanish Roy
Cryptocurrency an entity of the virtual world is built using blockchain technology which is nothing but an array of protocols in the cryptographic language, a code which is extremely complex in its characteristics specifically scripted to provide secure and non-decrypt able data transfers. The minds behind this rely eminently on the use of advanced mathematics, and complicated computer engineering theories to curtail and render cracking each segment next to impossible. Not only do they maintain a barrier which is impossible to break, they have the ability to mask the user’s identity, which makes each and every transaction extremely personal and hides the attributes to the person or groups as concerned. Further, the concept of Cryptocurrency has been moulded into its fine structure by the mechanism of de-centralised control, which simply means that the whole innovation is not marked by a single server, rather all the networking components of the entity is handled by the respective users and is expected to do its job with smoother functioning and maintaining a perfect stability. (In words of Dr. Parag Diwan) Follow Dr. Parag Diwan - https://www.facebook.com/Dr-Parag-Diw... This video is an original work by Mirage Production | An initiative by Gyanish Roy ( https://www.facebook.com/gyanish.roy/ ) in association with Paradigm Consultants & Resource Management ( https://www.facebook.com/PCRMPL/?time... )
Views: 63 Gyanish Roy
This video is an explanation of internet relay chat. Below points are explained in this video: - What is chatting? - What is the chat program? - What is internet relay chat?. - IRC Architecture. - Properties internet relay chat. ---- Computer Science Gurukul channel is a step towards computer science education to spread its importance among students, professional and technology enthusiastic people. This channel will always work to provide pure computer science knowledge in the Hindi language. The goal of this channel is to help “No-Degree Software Professional” and Kids programmer. Facebook: https://www.facebook.com/computersciencegurukul YouTube: https://www.youtube.com/c/computersciencegurukul
Views: 5021 Computer Science Gurukul
Find the notes of Cyber Security Access Control Authentication Authorization on this link - https://viden.io/knowledge/cyber-security-access-control-authentication-auth?utm_campaign=creator_campaign&utm_medium=referral&utm_source=youtube&utm_term=ajaze-khan-1
Views: 13732 LearnEveryone
What is SECURE SHELL? What does SECURE SHELL mean? SECURE SHELL meaning - SECURE SHELL definition - SECURE SHELL explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH. The protocol specification distinguishes between two major versions, referred to as SSH-1 and SSH-2. The most visible application of the protocol is for access to shell accounts on Unix-like operating systems, but it sees some limited use on Windows as well. In 2015, Microsoft announced that they would include native support for SSH in a future release. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols such as the Berkeley rlogin, rsh, and rexec protocols. Those protocols send information, notably passwords, in plaintext, rendering them susceptible to interception and disclosure using packet analysis. The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet, although files leaked by Edward Snowden indicate that the National Security Agency can sometimes decrypt SSH, allowing them to read the contents of SSH sessions. On 6 July 2017 the government transparency organization WikiLeaks confirmed that the US Central Intelligence Agency had developed hacking tools to crack the SSH protocols used by the Microsoft Windows and Linux operating systems by publishing the official "User Guides" for those tools.
Views: 226 The Audiopedia
find relevant notes at-https://viden.io/
Views: 63343 LearnEveryone
#askfaizan | #syedfaizanahmad Block Cipher Modes of Operation | CBC mode | Part 2 https://youtu.be/Q7LKmASkVSU Hill Cipher | Complete Algorithm with Example https://youtu.be/B0Q7w7Fd7ms Playfair Substitution Cipher https://youtu.be/w_xr7pj-O6c Monoalphabetic Substitution Cipher https://youtu.be/Hw1T7GOnVW0 Caesar Cipher | Caesar Substitution Cipher https://youtu.be/2N9GlhysYJw PlayList : Cryptography and Network Security : https://www.youtube.com/playlist?list=PLhwpdymnbXz7hvvqhqjIIG4tEdhAgQqll Block cipher processes the data blocks of fixed size If size of message is larger than block size. Then, the message is divided into a series of sequential message blocks. Multiple blocks of plaintext are encrypted using the same key, security issues arise. To apply a block cipher in a variety of applications, five modes of operation have been defined by NIST 1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode The simplest mode is the electronic codebook (ECB) mode Plaintext is handled one block at a time Each block of plaintext is encrypted using the same key The ECB mode is deterministic If plaintext block P1, P2,…, Pm are encrypted twice under the same key, the output ciphertext blocks will be the same. CBC is technique in which the same plaintext block, if repeated, produces different ciphertext blocks Each plaintext block is XORed with the ciphertext block that was previously produced To produce the first block of ciphertext, an initialization vector (IV) is XORed with the first block of plaintext For decryption, IV data is XORed with first ciphertext block decrypted.
Views: 987 Ask Faizan
The design and analysis of network protocols that use cryptographic primitives is one of the most fundamental and challenging areas of security research. In this talk, I will present logical methods for protocol analysis that address two central problems in this area. The first is compositionality, where the goal is to develop methods for proving correctness of compound protocols by combining independent proofs of their components. Protocol Composition Logic (PCL) is a Floyd-Hoare style logic that supports axiomatic proofs of protocol properties. Protocol proofs in PCL are compositional and follow the designer intuition when constructing protocols using standard components. The second research goal is to develop symbolic methods for protocol analysis while being faithful to the complexity-theoretic model of modern cryptography. Our first result here is Computational PCL - a symbolic logic with syntax and proof system similar to PCL. However, the semantics of CPCL is defined with respect to the complexity-theoretic model of cryptography. These methods have been successfully applied to a number of network security protocols including the IEEE 802.11i wireless authentication protocol, IPSec's new key exchange protocol IKEv2, and SSL/TLS.
Views: 108 Microsoft Research
Thank you friends to support me Plz share subscribe and comment on my channel and Connect me through Instagram:- Chanchalb1996 Gmail:- [email protected] Facebook page :- https://m.facebook.com/Only-for-commerce-student-366734273750227/ Unaccademy download link :- https://unacademy.app.link/bfElTw3WcS Unaccademy profile link :- https://unacademy.com/user/chanchalb1996 Telegram link :- https://t.me/joinchat/AAAAAEu9rP9ahCScbT_mMA
Views: 31017 study with chanchal
Philipp Kant Formally Specifying Blockchain Protocols using the Psi Calculus Blockchains are distributed systems, with actors that adhere to agreed-upon protocols. The protocols ensure that the systems performs as desired, even when some of the actors behave dishonestly. Since the integrity of such a system can protect hundreds of millions of dollars, cryptographers spend great effort on designing the protocols, and proving correctness guarantees under well-specified threat models. The implementation of the actual systems running those protocols is then performed by software engineers. These two activities require different skillsets, as well as different levels of abstraction. Bridging this gap while preserving the correctness guarantees is a non-trivial task. At IOHK, we use the Psi calculus to translate the cryptographic protocols described in research papers (main protocol here, related papers here) into a formal language, producing a machine-readable, executable specification. This has multiple benefits: It creates a common language for the researchers and engineers. It forces the specification to be complete and unambiguous. It allows simulations, including performance simulations, of the systems before they are fully implemented. The leap that leads from the research paper to the implementation can then be replaced by a larger number of small steps, each refining the specification and adding more details and design decisions. It is then feasible to show that the implementation matches the paper, by verifying that each of these steps. Philipp Kant During his postdoc years in theoretical particle physics, Philipp developed a passion for Haskell, and finally made the switch to software development in 2014. Early in 2017, he joined IOHK, a cryptocurrency research and development company. http://bobkonf.de/2018/kant.html
Views: 1031 BOB
Learn SSH in Nepali Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network.The best known example application is for remote login to computer systems by users. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH. The protocol specification distinguishes between two major versions, referred to as SSH-1 and SSH-2. The most visible application of the protocol is for access to shell accounts on Unix-like operating systems, but it sees some limited use on Windows as well. In 2015, Microsoft announced that they would include native support for SSH in a future release. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols such as the Berkeley rlogin, rsh, and rexec protocols. Those protocols send information, notably passwords, in plaintext, rendering them susceptible to interception and disclosure using packet analysis. The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet, although files leaked by Edward Snowden indicate that the National Security Agency can sometimes decrypt SSH, allowing them to read the contents of SSH sessions.
Views: 43 nepalitechtutorial
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: 600 Microsoft Research
~~~ Formal verification ~~~ Title: What is Formal verification?, Explain Formal verification, Define Formal verification Created on: 2018-10-12 Source Link: https://en.wikipedia.org/wiki/Formal_verification ------ Description: In the context of hardware and software systems, formal verification is the act of proving or disproving the correctness of intended algorithms underlying a system with respect to a certain formal specification or property, using formal methods of mathematics.Formal verification can be helpful in proving the correctness of systems such as: cryptographic protocols, combinational circuits, digital circuits with internal memory, and software expressed as source code. The verification of these systems is done by providing a formal proof on an abstract mathematical model of the system, the correspondence between the mathematical model and the nature of the system being otherwise known by construction. Examples of mathematical objects often used to model systems are: finite state machines, labelled transition systems, Petri nets, vector addition systems, timed automata, hybrid automata, process algebra, formal semantics of programming languages such as operational semantics, denotational semantics, axiomatic semantics and Hoare logic. ------ To see your favorite topic here, fill out this request form: https://docs.google.com/forms/d/e/1FAIpQLScU0dLbeWsc01IC0AaO8sgaSgxMFtvBL31c_pjnwEZUiq99Fw/viewform ------ Source: Wikipedia.org articles, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Support: Donations can be made from https://wikimediafoundation.org/wiki/Ways_to_Give to support Wikimedia Foundation and knowledge sharing.
Views: 89 Audioversity
Shafi Goldwasser, Silvio Micali Receive 2012 ACM Turing Award For Advances In Cryptography Shafi Goldwasser and Silvio Micali laid the foundations of modern theoretical cryptography, taking it from a field of heuristics and hopes to a mathematical science with careful definitions and security models, precise specifications of adversarial capabilities, and rigorous reductions from formally defined computational problems. Their results, jointly and with others, established the now-standard definitions of security for the fundamental primitives of encryption and digital signatures, and provided exemplary implementations meeting the stated security objectives. Even more importantly, their work helped to establish the tone and character of modern cryptographic research. Jointly and in collaboration with others, they provided stunning innovations in the form of random functions, interactive proofs, and zero-knowledge protocols, with implications beyond cryptography to theoretical computer science in general. http://amturing.acm.org
Views: 5380 Association for Computing Machinery (ACM)