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Cryptographie - partie 1 : chiffrement de César
 
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Chapitre "Cryptographie" - Partie 1 : Le chiffrement de César Plan : César a dit... ; Des chiffres et des lettres ; Modulo ; Chiffrer et déchiffrer ; Espace des clés et attaque ; Algorithmes Exo7. Cours et exercices de mathématiques pour les étudiants. Retrouvez le polycopié sur http://exo7.emath.fr
Views: 135365 Exo7Math
Secure Shell - Applied Cryptography
 
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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: 1953 Udacity
Démontrer une congruence - Terminale
 
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Démontrer une congruence. 👍 Site officiel : http://www.maths-et-tiques.fr Twitter : https://twitter.com/mtiques Facebook : https://www.facebook.com/mathsettiques/ Instagram : https://www.instagram.com/yvanmonka/
Views: 37502 Yvan Monka
Voting - Applied Cryptography
 
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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: 270 Udacity
Threat Modeling Against Payment Systems - Dr. Grigorios Fragkos
 
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This talk was presented at OWASP London Chapter Meeting on 18-May-2017. Slides can be downloaded here: https://www.owasp.org/images/9/9e/DrGFragkos-ThreatModeling-PaymentSystems-OWASP-2017-May-18.pdf Payment systems are part of our everyday lives, with most of the transactions performed through the use of a Point-of-Interaction (POI) device or a Virtual Terminal. Although payment terminals and virtual terminals make use of strong encryption and a secure communications channel, the Point of Sale (POS) is still a target for cyber-criminals. The malware affecting point-of-sale systems seen in previous years has demonstrated that criminals continually adapt to find ways to target card payment channels and keep the cycle going. This presentation however, attempts to go a step further and asses payment systems from a hypothetical attacker's point of view, by undertaking at threat modeling exercise against payment systems. The purpose of the threat modeling is to provide defenders with a number of scenarios (attack vectors) that it is possible to be used by attackers, while their activity remain unnoticed. One of the most important lessons of this Threat Modeling exercise was the discovery of a potential scenario that could allow cyber-criminals to shift from targeting Card Holder Data (CHD) to targeting the money directly. Speaker Bio: Dr. Grigorios Fragkos is the Head of Offensive Cybersecurity for DeepRecce(invinsec). He has a number of publications in the area of Computer Security and Computer Forensics with active research in CyberSecurity and CyberDefence. His R&D background in Information Security, including studies on applied CyberSecurity at MIT, along with his experience in the CyberDefense department of the Greek military, is invaluable when it comes to safeguarding mission critical infrastructures. Written the next generation SIEM as part of his PhD research with “notional understanding” of network event for real-time threat assessment. Grigorios (a.k.a. Greg) has been invited to present in a number of security conferences, workshops and summits over the years, and he is also the main organiser for Security BSides Athens. Thinking ahead and outside-the-box when dealing with information security challenges is one the key characteristics of his talks.
Views: 484 OWASP London
Exercise 1 Solutions
 
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Views: 5988 SchoolOfEngUoE
2016 - Marek Śmigielski - Payment card cryptography for java developers
 
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After we've released a first commercial payment card with dynamic cvv code presented on e-ink paper on the bottom of the card there was so much inaccurate comments from the tech people in the social websites that I was scared and at the same time frustrated. People I know, who are the good developers or projects managers simply do not understand the basis of payment cryptographical flows. I was almost screaming that "cvv code is not just random digits! It's cryptographical signature of your card and it is never ever stored or represented on anything except your card and to verify it a super secure hardware called HSM needs to be used to recompute it and decide if the input made by a user in a web browser is the correct one!" Then I've realised that in fact if not for the project I was involved in last year my knowledge would be more or less the same: inaccurate and based on the wrong assumptions. When I looked around for the reasons why there is so much gap between people’s knowledge and real security patterns that are used in payment industry I've found a very simple explanation. There is simply not enough accessible and well presented information about payment cryptography and security measures. There is only highly advanced stuff with more mathematics than text or it is inaccessible due to the necessity of having to be part of payment organisations such as Visa or Security Council. My talk is aiming to fill this gap by introducing the audience to most popular machinery involved in making our world secure enough to trust the credit or debit card. I would like to present: * basis of symmetric cryptography algorithms * key derivation and why it so important for payment protection * how pin flows from ATM to issuer bank in order to be verified * what is HSM and why it is used * one more real world example with online payment transactions * how to tie it all together with PA-DSS certification As a practical bonus I would also like to show some java implementations of those algorithms and contrast it with how integration with the hardware crypto-modules looks like.
Views: 917 confiturapl
SSH login without password
 
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ssh login without password This short tutorial shows how to connect remote machine using ssh protocol without entering password. For each and every step and commands please visit the below url http://technologylair.net/2013/08/ssh-login-without-password/ Buy Linux Networking Cookbook Flipkart : http://goo.gl/nNt7B0 Amazon : http://goo.gl/8YacRf Technology Lair : www.technologylair.net Subscribe : http://www.youtube.com/subscription_center?add_user=technologylair For More Videos : http://www.youtube.com/user/technologylair/videos For Video Tutorials :http://www.youtube.com/playlist?list=PLC71CFFF7A916DCAA For Android : http://www.youtube.com/playlist?list=PLUXK1VpPWQKHI1l-NvM5jvNKKnmNy9eHp Kalam e Iqbal : http://www.youtube.com/playlist?list=PLF057785BD260F061 Like us on Facebook : https://www.facebook.com/techlair Tweet us : @technologylair Follow us : https://plus.google.com/u/0/118196883367288585963/posts Pin us : http://www.pinterest.com/technologylair/
Views: 74923 TechLair
First Exploit! Buffer Overflow with Shellcode - bin 0x0E
 
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We write our first real exploit to get root access. Solving stack5 from exploit-exercises.com with a simple Buffer Overflow and shellcode. Run into some problems (illegal instruction): https://www.reddit.com/r/LiveOverflow/comments/54o705/found_what_i_think_is_a_slight_problem_in_the/ Stack Level 5: https://exploit.education/protostar/stack-five/ -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #BufferOverflow #BinaryExploitation #Shellcode
Views: 102777 LiveOverflow
E-Signature Setup for Cash Practice  Software Auto-Debit System Receipts for ChiroTouch Users
 
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Now you can gather your clients' signatures electronically! You can get Electronic Signatures from your clients now! This will work with touch screen monitors, any digital input pen/tablet, or even just your computer mouse! Now your Cash Practice® - ChiroTouch® integration just got even better! Learn more at http://CashPractice.com
Views: 1108 Cash Practice Systems
Understanding ARM HW Debug Options by Michael E Anderson
 
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Understanding ARM HW Debug Options - Michael E. Anderson, The PTR Group Hardware-based debuggers are a staple in the embedded Linux world. However, the ARM architecture supports several different flavors of hardware debugging including JTAG, SWD, SWO, CMSIS-DAP and more. What are the features of these debugger interfaces and how can you use them to debug low-level code such as drivers in the Linux kernel? In this session, we will describe each of these interfaces and how they are used with a live demonstration of OpenOCD and its use to debug Linux kernel code. About Michael E Anderson Mike Anderson is currently CTO and Chief Scientist for The PTR Group, Inc. With over 39 years in the embedded and real-time computing industry, Mike works with a number of RTOS, Linux and Android-based devices in applications ranging from satellites and robotics to SCADA platforms. However, his focus over the past few years has been the use of Linux and Android in embedded sensor applications and the deployment of the Internet of Things.
RSA Key Extraction via Low-Bandwidth Acoustic Cryptanalysis
 
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RSA Key Extraction via Low-Bandwidth Acoustic Cryptanalysis by Adi Shamir, Eran Tromer, Daniel Genkin. Talk at Crypto 2014.
Views: 6326 TheIACR
Intro to Blockchain - BRK3050
 
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In this session, Mark explains how blockchains work, including how they use hashes, transactions, blocks and proof-of-work consensus algorithms to build distributed ledgers. He presents the capabilities of some of the most common blockchain networks, then describes how the Confidential Consortium Framework (CCF) addresses their limitations to make blockchains suitable for a wide variety of business consortiums.
Views: 1436 Microsoft Developer
Python "netcat" Server CTF Challenge - ABYSS
 
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Join the Family: https://discord.gg/Kgtnfw4 Support me on Patreon: https://patreon.com/johnhammond010 Learn to code with a TeamTreehouse Discount: treehouse.7eer.net/1WOz6 E-mail: [email protected] PayPal: http://paypal.me/johnhammond010 GitHub: https://github.com/JohnHammond Site: http://www.johnhammond.org Twitter: https://twitter.com/_johnhammond
Views: 3105 John Hammond
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: 53921 Harvard University
How do SIM Cards work? - SIMtrace
 
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In this video we use SIMtrace to intercept the communication between the phone and SIM card to understand how that works. This is part 1 in a series introducing mobile security. Vadim Yanitskiy: https://twitter.com/axilirator Osmocom: https://osmocom.org/ -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #MobileSecurity
Views: 770245 LiveOverflow
The Secret step-by-step Guide to learn Hacking
 
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totally clickbait. but also not clickbait. I don't know where to start hacking, there is no guide to learn this stuff. But I hope you still have a plan now! How to learn hacking - https://www.youtube.com/watch?v=iKXd9zW1OuI The ultimate guide, everything you need to know - https://google.com Stuff that looks cool: crypto challenges - https://cryptopals.com/ wargames - https://overthewire.org other exploit challenges - http://pwnable.kr/ basics of exploitation (+ my playlists) - https://exploit-exercises.com/protostar/ math puzzles with programming - https://projecteuler.net break ethereum smart contracts - https://ethernaut.zeppelin.solutions/ Try something new: create an android app - https://developer.android.com/training/basics/firstapp/index.html create a website with python - http://flask.pocoo.org/ do some nice animations - https://processing.org/tutorials/ make some LEDs blink - https://www.arduino.cc/en/Guide/HomePage Other Channels: GynvaelEN - https://www.youtube.com/channel/UCCkVMojdBWS-JtH7TliWkVg MurmusCTF - https://www.youtube.com/channel/UCUB9vOGEUpw7IKJRoR4PK-A MalwareAnalysisForHedgehogs - https://www.youtube.com/channel/UCVFXrUwuWxNlm6UNZtBLJ-A hasherezade - https://www.youtube.com/channel/UCNWVswPNgn5kutPNa5sprkg IppSec - https://www.youtube.com/channel/UCa6eh7gCkpPo5XXUDfygQQA John Hammond - https://www.youtube.com/user/RootOfTheNull -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm.
Views: 758395 LiveOverflow
Préparation BAC S 2019 # Exercice 7. Nombres complexes et algorithme.
 
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Voici plus de détails sur la formation complète BAC S 2019 - Préparation BAC S 2019👉 https://bit.ly/2VndIh8 ----------------------------------------------------------------------------------------------------------- Clique sur ce lien pour télécharger et imprimer l'énoncé de cet exercice en pdf. 👉http://bit.do/eKDFT ----------------------------------------------------------------------------------------------------------- Lecture et analyse de la partie A : 00:00 Correction de la question Partie A - Question 1: 04:24 Correction de la question Partie A - Question 2: 06:42 Correction de la question Partie A - Question 3: 08:59 Correction de la question Partie B - Question 1: 16:34 Correction de la question Partie B - Question 2: 21:00 Correction de la question Partie B - Question 3: 26:36 Correction de la question Partie B - Question 4: 31:02 Correction de la question Partie B - Question 5: 36:36 ----------------------------------------------------------------------------------------------------------- Tu es super motivé(e) 💪 et tu veux mettre toutes les chances de ton côté pour avoir une excellente note en maths au BAC? 😎 Yeaaaah!! 😎😎 Passe à l'action maintenant 🥇 et rejoins les centaines d'élèves de Terminale S motivés 🤙 qui veulent tout déglinguer 🥊 au BAC. Je vais t'accompagner personnellement pour préparer l'épreuve de maths du BAC S 2019 🤫 en 30 exercices type BAC corrigés pas à pas en vidéos. 🤭 Et la cerise 🍒 sur le gâteau 🍰, tu peux aussi avoir mon aide et mon support par messagerie instantanée sur ton téléphone via WhatsApp. 😱 Et oui!! 😱 ---------------------------------------------------------------------------------------------------------- Si tu as la moindre question 🙄 concernant le programme BAC S que je propose, tu peux ma la poser sur WhatSapp en cliquant sur ce lien 👉 https://wa.me/33630341613 ----------------------------------------------------------------------------------------------------------- N'oublie pas de me suivre sur : 👉INSTAGRAM : https://www.instagram.com/kiffelesmaths/ 👉FACEBOOK : https://www.facebook.com/kiffelesmaths ----------------------------------------------------------------------------------------------------------- Clique sur ce lien pour télécharger et imprimer l'énoncé de cet exercice en pdf. 👉http://bit.do/eKDFT ----------------------------------------------------------------------------------------------------------- Lecture et analyse de la partie A : 00:00 Correction de la question Partie A - Question 1: 04:24 Correction de la question Partie A - Question 2: 06:42 Correction de la question Partie A - Question 3: 08:59 Correction de la question Partie B - Question 1: 16:34 Correction de la question Partie B - Question 2: 21:00 Correction de la question Partie B - Question 3: 26:36 Correction de la question Partie B - Question 4: 31:02 Correction de la question Partie B - Question 5: 36:36
Méthode de calcul de la complexité d'un algorithme | Rachid Guerraoui
 
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Cette leçon donne une méthode pratique pour déterminer la complexité d'un algorithme. Elle consiste à voir comment l'algorithme évolue en augmentant la taille du paramètre n de l'algorithme. Intervenant: Rachid GUERRAOUI Edition: El Mahdi EL MHAMDI
Views: 135909 Wandida, EPFL
Ever wonder how Bitcoin (and other cryptocurrencies) actually work?
 
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Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Home page: https://www.3blue1brown.com/ Brought to you by you: http://3b1b.co/btc-thanks And by Protocol Labs: https://protocol.ai/join/ Some people have asked if this channel accepts contributions in cryptocurrency form. Indeed! http://3b1b.co/crypto 2^256 video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT ------------------ Animations largely made using manim, a scrappy open source python library. https://github.com/3b1b/manim If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and has many other quirks you might expect in a library someone wrote with only their own use in mind. Music by Vincent Rubinetti. Download the music on Bandcamp: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown Stream the music on Spotify: https://open.spotify.com/album/1dVyjwS8FBqXhRunaG5W5u If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people. ------------------ 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: 2588202 3Blue1Brown
Linear Diophantine Equation
 
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An example using the Euclidean Algorithm to find the general solution of a linear Diophantine Equation.
Views: 87038 DLBmaths
SQLi to shell to binded port
 
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https://pentesterlab.com/from_sqli_to_shell.html
Views: 15203 TheFailCollective
Generate a CSR with an ECC Encryption Algorithm on Microsoft Windows Server 2008
 
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Symantec’s quick tutorial, know how to generate Certificate Signing Request (CSR) using the Elliptical Cryptography Curve (ECC) encryption algorithm on the Microsoft Windows Server 2008. ECC encryption is only available for Symantec Secure Site Pro & Secure Site Pro EV SSL Certificate. For more information on ECC SSL encryption visit here - http://www.symantec.com/connect/blogs/introducing-algorithm-agility-ecc-and-dsa
Views: 629 CheapSSLsecurity
Concours Alkindi 2018 - L'exercice 'Générateur'
 
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Dans le cadre du concours Alkindi 2018, découvrez l'exercice de cryptographie ‘Générateur’ ainsi que sa correction.
Views: 1056 InriaChannel
The BB84 Protocol
 
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Views: 305 Dani78112
Blockchain 101 - A Visual Demo
 
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This is a very basic visual introduction to the concepts behind a blockchain. We introduce the idea of an immutable ledger using an interactive web demo. Part 2 is here: https://youtu.be/xIDL_akeras If you are interested in playing with this on your own, it is available online at: http://anders.com/blockchain/ The code that runs this demo is also on GitHub: https://github.com/anders94/blockchain-demo I'm @anders94 on Twitter and @andersbrownworth on Steemit. Donations: BTC: 1K3NvcuZzVTueHW1qhkG2Cm3viRkh2EXJp ETH: 0x84a90e21d9d02e30ddcea56d618aa75ba90331ff ETC: 0xab75ad757c89fa33b92090193a797e6700769ef8
Views: 971667 Anders Brownworth
Security's Once and Future King: Introducing Smart Cards to the Web
 
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Google Tech Talks December, 14 2007 ABSTRACT About Gemalto Gemalto (Euronext NL 0000400653 GTO) is the leader in digital security with pro forma 2006 annual revenues of €1.7 billion, more than 85 offices in 40 countries and about 10,000 employees including 1,300 R engineers. In a world where the digital revolution is increasingly transforming our lives, Gemalto's solutions are designed to make personal digital interactions more convenient, secure and enjoyable. Gemalto provides end-to-end digital security solutions, from the development of software applications through design and production of secure personal devices such as smart cards, SIMs, e-passports, and tokens to the deployment of managed services for its customers. More than a billion people worldwide use the company's products and services for telecommunications, financial services, e-government, identity management, multimedia content, digital rights management, IT security, mass transit and many other applications. As the use of Gemalto's software and secure devices increases with the number of people interacting in the digital and wireless world, the company is poised to thrive over the coming years. Gemalto was formed in June 2006 by the combination of Axalto and Gemplus. For more information please visit www.gemalto.com. Speaker: Kapil Sachdeva Kapil Sachdeva is a Software Technologist with Gemalto, Technology & Innovation. The primary focus of Kapil's work is on the design and development of next generation smart card operating systems, virtual machines (.NET and Java) and fast XML parsers. Lately Kapil has been focusing on Identity Management, participating in specification committees within Liberty Alliance, building working prototypes for involving Windows CardSpace, WS-* and OpenID, and developing applications for smart cards for Identity Management. Kapil is also involved with European Identity Management initiatives such as Fidelity and FC2. Kapil's work has been instrumental in bridging the gap between multi-application smart cards and Identity Management. You can read Kapil's musings in his blog "Smartcard Serenity" http://www.dotnetcard.com/Blogs/ksachdeva/
Views: 12549 GoogleTechTalks
Capture the flag hacking challenges tutorial 0x00 | on (Learn Hacking)
 
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In this tutorials im gonna show how you can manage to play CTFs hacking challenges. #+++++++++++++++++++++# # # # Learn Hacking # # # #+++++++++++++++++++++# Capture the flag (CTF) is a traditional outdoor game where two teams each have a flag (or other marker) and the objective is to capture the other team's flag, located at the team's "base," and bring it safely back to their own base. On hacking world this is similar but each team must get the flag from the website to earn more points.
Views: 1416 Learn Hacking
Matrix Payment Systems
 
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Save money on B2B credit card processing with Matrix Virtual Terminal, a web based payment gateway for internet sales and phone orders of card swiped and mobile systems. Fast, secure, cost effective control of your processing fees. Commercial grade processing at the lowest interchange rates with allowed secure access. Utilize tracking history, email receipts, contact lists, tracking information and reporting data. A Business to Business streamlined Electronic Bill Presentment and Payment Solution. Learn more at www.Matrix-PS.com or www.MatrixPaymentSystems.com Video by www.StoneCliffProductions.com
Views: 2823 Lambert Smith
How to organize, add and multiply matrices - Bill Shillito
 
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View full lesson: http://ed.ted.com/lessons/how-to-organize-add-and-multiply-matrices-bill-shillito When you're working on a problem with lots of numbers, as in economics, cryptography or 3D graphics, it helps to organize those numbers into a grid, or matrix. Bill Shillito shows us how to work with matrices, with tips for adding, subtracting and multiplying (but not dividing!). Lesson by Bill Shillito, animation by The Leading Sheep Studios.
Views: 284643 TED-Ed
PRIME NUMBER EXERCISES
 
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International Class 2018 Semarang State University
Escaping the Global Banking Cartel
 
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Expanding on an observation from his last talk, Andreas asks why we talk so much about the cartels in drugs and oil, but rarely about one of the largest cartels in the world: banking. He analyses recent (unacknowledged) history with the 2008 financial crisis, the corrupt revolving door with regulators, how kleptocracy is destroying democracy, and why Bitcoin matters as an exit when voice is no longer an option. This talk took place on November 10th 2018 as part of the 'Internet of Money' tour at the Edmonds Center for the Arts near Seattle, Washington: https://antonopoulos.com/event/the-internet-of-money-tour-seattle/ RELATED: Worse Than Useless: Financial Surveillance - https://youtu.be/n4F-h4xuXMk Money as a System-of-Control - https://youtu.be/FyK4P7ZdOK8 The Stories We Tell About Money - https://youtu.be/ONvg9SbauMg Measuring Success: Price or Principle - https://youtu.be/mPMsbgWl9p4 Bitcoin's Origins and the Genesis Blockade - https://youtu.be/cagoyF3WePo Why Open Blockchains Matter - https://youtu.be/uZPIz3ArQww Decentralised Globalisation - https://youtu.be/QoiR4aNbTOw Investing in Education instead of Speculation - https://youtu.be/6uXAbJQoZlE Security vs. Complexity - https://youtu.be/M82t5wZG3fc Beyond Price: Bitcoin's Impact on the Future - https://youtu.be/rvwVbRQ5Ysc Why I'm against ETFs - https://youtu.be/KSv0J4bfBCc Regulation and the bank boycott - https://youtu.be/8ypH69Cb1l0 Wallet design and mass adoption - https://youtu.be/WbZX6BDZJHc Mass adoption and peer-to-peer commerce - https://youtu.be/n9qIAEFS-Qs Scaling strategies and adoption - https://youtu.be/dML1a_Ek9Kw Price volatility and store of value - https://youtu.be/wzzZT95ijTo Why I earn bitcoin instead of buying - https://youtu.be/Ci7TyD8jETY Job opportunities with cryptocurrencies - https://youtu.be/89_p4pDlQtI Inspiring cryptocurrency projects - https://youtu.be/WW8norCKUbE From barter to abstract money - https://youtu.be/KYsppZoHguQ Crossing the chasm of theoretical vs. real need - https://youtu.be/yIR0OBEAaUE Remittances and smuggling in Venezuela - https://youtu.be/RRXecXfWARw How long until mainstream adoption? - https://youtu.be/y3cKBDBabtA What is the biggest adoption hurdle? - https://youtu.be/jHgyHF3F2TI Bitcoin as everyday currency - https://youtu.be/xYvvSV4mjH0 How to avoid re-creating systems of control - https://youtu.be/EfoGnDoaBL8 Hyperbitcoinization - https://youtu.be/AB5MU5fXKfo Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos! MASTERING BITCOIN, 2nd Edition: https://amzn.to/2xcdsY9 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ THE INTERNET OF MONEY, v1: https://amzn.to/2ykmXFs THE INTERNET OF MONEY, v2: https://amzn.to/2IIG5BJ Translations of THE INTERNET OF MONEY: Spanish, 'Internet del Dinero' (v1) - https://amzn.to/2yoaTTq French, 'L'internet de l'argent' (v1) - https://www.amazon.fr/Linternet-largent-Andreas-M-Antonopoulos/dp/2856083390 Russian, 'Интернет денег' (v1) - https://www.olbuss.ru/catalog/ekonomika-i-biznes/korporativnye-finansy-bankovskoe-delo/internet-deneg Vietnamese, 'Internet Của Tiền Tệ' (v1) - https://alphabooks.vn/khi-tien-len-mang MASTERING ETHEREUM (Q4): https://amzn.to/2xdxmlK Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 173428 aantonop
Install Python 3.7 on Windows or Linux
 
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Follow these steps to install Python 3.7 on Windows: 1. Remove old Python distributions 2. Browse to python.org and download installer 3. Install to C:\Python37 4. Add to PATH Environment Variable a. C:\Python37 b. C:\Python37\Scripts 5. Open command window (cmd) 6. Install packages with pip Python can also be installed on Linux with the following commands in a terminal window: Python 3+: sudo apt install python3 sudo apt install python3-pip Python 2.7 sudo apt install python sudo apt install python-pip See http://apmonitor.com/che263/index.php/Main/CourseProjects to learn scientific computing with Python and the Temperature Control Lab (http://apmonitor.com/heat.htm). These exercises use the Python Jupyter Notebook that is available when you install Anaconda.
Views: 33804 APMonitor.com
Algorithme (1ere partie d'exercices(de base)) en darija
 
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notre site : http://www.enjoy-studying.com partagez la video SVP, abonnez-vous et aimez notre page facebook pour plus de cours et d'exercices : https://www.facebook.com/enjoystudies notre groupe facebook : https://www.facebook.com/groups/enjoystudies
Views: 17744 ENJOY STUDYING
Napier's Curse
 
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To the power of x, you never seen it before, much less solved it, but you're like fo-sho, 'cause you have ideas that won't be denied. You take the xth root of both sides, but you're scratching your head, 'cause that didn't help, if the object is to get the x all by itself! You see, the only way to get that exponent down to earth, for what it's worth, there's nothing worse, and it is called inverse. In this case the Logarithm's your hearse, use Napier's curse to help you switch it around, And move that exponent a whole 6 feet underground. So use it, abuse it, apply it, remove it. Use it, abuse it, apply it, remove it. So why is it there - still? Looking down laughing, deriding while you're crying buckets over your spilled poten- -tial[shall] you stand this power drilling into your mind, Kinda like the fleeting feeling that you're dealing with π-ρ-technic visions of a exponential monster - unwind Untie[deride] the lies of your lofty tormentor, resent the disguise and embrace the inventor. Here's Johnny with a mantra that will cut to the center, as HE applies the inverse - exponential descenter. Clear your mind, lift the fog, The base of the power is the base of the log. Clear your mind, lift the fog, The base of the power is the base of the log. The base of the power is the base of the log. The base of the power is the base of the log. The base of the power is the base of the log. No more exponential messes for you, the essential message to you: Be the change you want to see, apply Logs to both sides of the equation that's distressing, and oppressing and depressing, and after all the messing, and the stressing, and the testing. I suppose logs are a blessing, but they maybe not the best thing.
Views: 1620 Matheatre1
Déterminer le quotient et le reste d'une division euclidienne - Terminale
 
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Déterminer le quotient et le reste d'une division euclidienne. 👍 Site officiel : http://www.maths-et-tiques.fr Twitter : https://twitter.com/mtiques Facebook : https://www.facebook.com/mathsettiques/ Instagram : https://www.instagram.com/yvanmonka/
Views: 55096 Yvan Monka
Alkynes: polyhalogenation
 
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00:29 General structure of alkyne 01:41 Mechanism for first step in halogenation of alkyne 03:53 Dihalogenation of acetylene (ethyne) 07:36 Table 1 07:51 Table 2 08:07 Dihalogernation of trans-1,2-dihaloethylene (1,2-dihaloethene) 11:52 Dihalogenation of propyne 15:36 Dihalogernation of trans-1,2-dihalopropylene (1,2-dihalopropene) 19:27 Dihalogenation of 1-butyne 21:14 Dihalogernation of trans-1,2-dihalo-1-butene 22:21 Dihalogenation of 2-butyne 24:24 Dihalogernation of trans-2,3-dihalo-2-butene 26:10 Tables reprise The dihalogenation of various alkynes, and further dihalogenation of the resulting dihaloalkenes to tetraalkanes. Computed enthalpies of activation (for the transition states) and enthalpies of reaction (for the products) are tabulated. Computed structures of the reactants, transition states, and products (to scale) are displayed with color graphics. "(TS)" indicates geometry of transition state. All structures computed at the B3LYP/6-311++G(d,p) level of theory. Don't forget to like, share, and subscribe!
Views: 75 lseinjr1
CS50 2017 - Lecture 2 - C, continued
 
01:42:55
Views: 90251 CS50
Air highway - Drones Management System
 
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The Drones Management System is the dispatcher system for the drones. The Civil Drones Management System allows: - To build 3D maps and the air highways for the delivery-drones/human transportation drones(taxi-drones, private transportation drones) - Manage the air-traffic - Monitor it and keep the safety with the help of the tactical anti-collision system - The so built air highway conforms the certain developed by airhighway.online driving rules based on the land vehicle rules and the air-traffic rules - The system is capable of generation the flight plan for the drones and the system does not use google map services for any purpose. - The system generates the number of the flight plans for the drones and selects the best one based on: the current air-traffic, technical characteristics of the drone, battery level and drone's priority. The Military AI Tactical System, working on military drones, has a purpose of taking autonomous tactical decisions based on Artificial Intelligence and performing them. The Civil Drones Management System consists of the following modules: Tactical Radar Server - responsible for receiving the data from the Radar(s) about the drones' positions , processing it and sharing among the whole system Permission Application Server - responsible processing the drone's requests: creation of the flight plans, responses to the tactical requests and collisions prevention management, etc. Monitoring System - responsible for monitring and management of the air highways, drones. The system also allows to send individual or group commands to the drones Database - responsible for keeping all the data (flight plans, movements) saved for the possible further use, such as: reports generation and investigations. The reports gets generated using MS Crystal Reports. There is an option allowing to switch between MS SQL Server and MongoDB databases. Client Drone Application - available in two releases: one of them is for the big drones responsible for human transprtation and another one is for the cargo-drones responsible for purchase's transportation. The first one contains user-friendly interface which serves as a communication layer between a drone and a human. The second one does not contain an interface because it's insalled on the cargo-drones only. The Client Drone Application communicates with the Tactical and Permission Servers using UDP network protocol. Radar Server - responsible for data communication among server located applications of the system Map Creator - responsible for creation of the 3D maps for the flight, consumed by drones. Allows to create 3D map of the region/city. All the communications are security protected and based on digital signatures using Elliptic Curves cryptography. The web site: http://airhighway.online
Views: 248 Rinat Galyautdinov
SNMP V3 Modules - SixtySec
 
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For more information and tutorials on SNMP and Data Networks, visit us at https://www.exploregate.com/Search?topic=51&sub_topics=63%2c57%2c109%2c85%2c88%2c100%2c52%2c86%2c95%2c84&text_input=
Views: 470 ExploreGate
Hack The Vote 2016 CTF: Sander's Fan Club [web100]
 
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Join the Family: https://discord.gg/Kgtnfw4 Support me on Patreon: https://patreon.com/johnhammond010 Learn to code with a TeamTreehouse Discount: treehouse.7eer.net/1WOz6 E-mail: [email protected] PayPal: http://paypal.me/johnhammond010 GitHub: https://github.com/JohnHammond Site: http://www.johnhammond.org Twitter: https://twitter.com/_johnhammond
Views: 1516 John Hammond
Beginner's Guide to CTF: PicoCTF [04] | Internet Kitties (Netcat)
 
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Join the Family: https://discord.gg/Kgtnfw4 Support me on Patreon: https://patreon.com/johnhammond010 Learn to code with a TeamTreehouse Discount: treehouse.7eer.net/1WOz6 E-mail: [email protected] PayPal: http://paypal.me/johnhammond010 GitHub: https://github.com/JohnHammond Site: http://www.johnhammond.org Twitter: https://twitter.com/_johnhammond
Views: 4876 John Hammond
Tuto | Présentation de Root Me
 
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Si la vidéo ta plus n'oublie pas de t'abonner et de laisser un petit like ! ^^ pour plus de détails: https://www.root-me.org/ musique de fond : https://www.youtube.com/watch?v=OJBxNA8cX-E https://www.youtube.com/watch?v=8xlDwukxjnA Mon skype : live:dimi97278 Mon snap : mrdims972 G+ : https://plus.google.com/u/0/110555233396245669468/posts
Views: 16193 Mister Network
V-Key Mobile Application Security
 
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V-Key has developed a breakthrough, one-of-a-kind technology that doesn't make providers of mission-critical applications have to chose between high security or a responsive mobile UX. That's because V-Key provides mobile application security by securing the apps, not the device--making data, mobile transactions, apps themselves secure. How? Learn more at www-v-key.com.
Views: 291 V-Key
(1/11) Fabriquer du hasard avec des conjectures d'informatique théorique
 
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Pour pouvoir mener à bien des simulations sur des structures aléatoires, il est souhaitable de disposer d'une suite satisfaisant des propriétés a priori contradictoires: être aléatoire (pour que la simulation soit valide), et être engendrée par un processus déterministe, afin de pouvoir relancer son programme sur la même valeur pour le débugger par exemple. Nous verrons comment des travaux en cryptographie permettent de concilier ces deux objectifs a priori contradictoires en s'appuyant sur des conjectures d'informatique théoriques. Ces résultats reposent sur de jolies démonstrations mathématiques et d'intéressants arguments probabilistes que cet exposé passera en revue.
Views: 1266 nicolas2222222222
Star Trek Continues E04 "The White Iris"
 
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Captain Kirk finds himself haunted by guilt from his past as the fate of an alien world hangs in the balance.
Views: 589548 Star Trek Continues
Microsoft Build 2019 - LIVE Stream - Day 2 (May 7)
 
09:49:06
To watch more sessions and ask questions live on air head over to https://aka.ms/MicrosoftBuildLive
Views: 15947 Microsoft Developer
The Go Programming Language
 
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Google Tech Talks October 30, 2009 ABSTRACT Presented by Rob Pike What is Go? Go is a new experimental systems programming language intended to make software development fast. Our goal is that a major Google binary should be buildable in a few seconds on a single machine. The language is concurrent, garbage-collected, and requires explicit declaration of dependencies. Simple syntax and a clean type system support a number of programming styles. For more on Go including FAQs, source code, libraries, and tutorials, please see: http://golang.org
Views: 382924 GoogleTechTalks
HKID Check Digit
 
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This video is about HKID Check Digit
CS50 2016 - Week 2 - Arrays
 
01:50:54
TOC 00:00:00 - Week 1 in Review 00:04:33 - Debugging 00:05:05 - buggy0 00:09:12 - buggy1 00:12:49 - buggy2 00:18:11 - buggy3 00:22:19 - debug50 00:29:04 - Rubber-Duck Debugging 00:31:46 - Problem Sets Overview 00:35:18 - Academic Honesty 00:39:07 - Puppies 00:39:58 - Cryptography 00:41:00 - Ralphie 00:44:21 - Secret-Key Cryptography 00:46:18 - Strings 00:48:06 - string0 00:57:35 - string1 01:01:20 - Typecasting 01:02:39 - ascii0 01:06:19 - ascii1 01:09:04 - capitalize0 01:12:41 - capitalize2 01:13:47 - man 01:16:31 - strlen 01:17:40 - More on Strings 01:22:49 - More on strlen 01:25:09 - Command-Line Arguments 01:26:53 - argv0 01:34:22 - argv1 01:36:35 - argv2 01:42:26 - exit 01:46:36 - Arrays in Summary 01:49:28 - Outro Explained Segments Debugging: http://youtu.be/KFw20grap2E Academic Honesty: http://youtu.be/nDKQiHs5cpI Secret-Key Cryptography: http://youtu.be/dRW1NElR-QY Strings: http://youtu.be/XLd2C9bF6_Q
Views: 184139 CS50