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Congruence (Modular Arithmetic) & 5 Properties Explained with 7 Problems: Ultimate Shortcuts
 
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Modular arithmetic especially the properties of congruence are an important tool in arriving at quick solutions to a variety of problems. In this video Mayank unravels this concept of Congruence starting with the basic concepts and then explaining the 5 key properties of Congruence (≡): a+c ≡ (b+d)mod N (Remainder of Sums ≡ Sum of Remainders) a-c ≡ (b-d)mod N (Remainder of Difference ≡ Difference of Remainders) ac ≡ (bd)mod N (Remainder of Products ≡ Products of Remainders) a^e ≡ b^e mod N (Remainder of Exponent ≡ Exponent of Remainders) a/e ≡ b/e (mod N/gcd(N,e)) (However, don’t do division without writing basic equation Mayank applies these concepts to arrive at quick solutions for 7 representative problems - reducing seemingly impossible math involving large numbers to mere seconds. Some example problems from the video: Find the remainder 6^(6^(6^6 ) )/7 Find the last digit of (17)^16 There are 44 boxes of chocolates with 113 chocolates in each box. If you sell the chocolates by dozens, how many will be leftover? More Motivations – Reducing Big Number @0:08 Why Bother? – Shortcuts to Several Problems @1:10 Face of a Clock @2:05 Face of a Clock Replace 12 with 0 – Module 12 @4:38 What Happens with 7 Days? @6:20 Running the Clock Backwards @8:37 Addition and Subtraction of Congruence’s @10:54 Application of Addition – Example-1 @14:30 Multiplication in Congruence’s @18:46 Application of Multiplication – Example -2/3 @22:15 Exponentiation in Congruence’s @26:08 Application of Exponentiation Example -4/5 @27:58 Division of Congruence’s: Never Divide, Think from Basics @33:37 Combining Congruence’s @38:43 Example – 6 @40:36 Concept of Multiplicative Inverse @48:33 Summary @49:30 Next – Faster Solutions to Exponent Problems @51:05 #Inverse #Exponentiation #Dozens #Subtraction #Happen #Congruence #Arithmetic #Reducing #Motivations #Delayed #Mayank #Examrace
Views: 49589 Examrace
Concept of Ring, Ring with Unity & Commutative Ring in hindi
 
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This video is useful for students of BSc/MSc Mathematics students. Also for students preparing IIT-JAM, GATE, CSIR-NET and other exams.
Perfect secrecy | Journey into cryptography | Computer Science | Khan Academy
 
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Claude Shannon's idea of perfect secrecy: no amount of computational power can help improve your ability to break the one-time pad Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/random-vs-pseudorandom-number-generators?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/case-study-ww2-encryption-machines?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: 132104 Khan Academy Labs
21. Cryptography: Hash Functions
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 70543 MIT OpenCourseWare
The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with "frequency analysis" Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography?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: 595061 Khan Academy
Module 7: Replay Attack
 
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A replay attack occurs when an unauthorized user captures network traffic and then sends the communication to its original destination, acting as the original sender. To prevent replay attacks you can implement timestamps and sequence numbers. References: Dunkerley, D., & Samuelle, T. (2014). Secure Network Administration. In Mike Meyers' CompTIA Security Certification passport, fourth edition (exam SY0-401) (4th ed., p. 300). New York: McGraw-Hill Education.
Views: 19433 Simple Security
Extended Euclidean Algorithm and Inverse Modulo Tutorial
 
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Using EA and EEA to solve inverse mod.
Views: 382487 Emily Jane
The concept of symmetric and asymmetric cryptography
 
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In this Video, Dr. Seema Batra, Assistant professor, Biyani Groups of Colleges, Jaipur, explains about the concept of symmetric and asymmetric cryptography. http://www.gurukpo.com/ http://www.biyanicolleges.org/
Views: 12644 Guru Kpo
Module 7: What is IP Spoofing?
 
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Spoofing attack involves using a fake network address to pretend to be a different computer. Attackers may change a computer's network address to appear as an authorized computer IP spoofing can enable an attacker to gain access to protected internal resources. References: Kim, D., & Solomon, M. (2014). Malicious Attacks, Threats, and Vulnerabilities. In Fundamentals of information systems security, second edition (2nd ed., p. 112). Burlington, MA: Jones & Bartlett Learning.
Views: 55764 Simple Security
How to Use the Feynman Technique - Study Tips - How to Study
 
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Hello Socratica Friends! We're here to help you be a Great Student. One of the greatest students of all time was also one of the greatest teachers of all time - Richard Feynman. He was a Nobel-winning physicist, who was legendary for being able to reach even complete novices with his clear, jargon-free explanations. Feynman knew a lot about how to help students learn, because he himself was insatiably curious, and never stopped learning. The Feynman Technique is named after this extraordinary thinker. It’s a way to test yourself as you study - do you REALLY understand something? Or are you just repeating what you read in a textbook or heard in class? This is one of the most important study tips to learn about being a great student, whether you are in high school, college, grad school, or you are learning on your own. After you watch the video, try our Feynman Technique Challenge - pick something complicated you are studying, and try to explain it to us in the comments. USE THE FEYNMAN TECHNIQUE! Are you a great explainer? SUBSCRIBE if you want to be notified of our next video! http://bit.ly/SocraticaSubscribe ΔΔΔΔΔΔΔΔΔΔΔΔ More STUDY TIPS videos: How to Read a Textbook http://bit.ly/ReadTextbooks How to Take Notes http://bit.ly/Cornell_Notes How to Use the Feynman Technique http://bit.ly/TheFeynmanTechnique How to Improve Your Vocabulary http://bit.ly/BuildVocab How to Use Flashcards http://bit.ly/Flashcards_Studytips How to Use the Pomodoro Technique http://bit.ly/PomodoroSocratica How to Do Speed Reading http://bit.ly/SpeedReadStudyTips How to Learn a Foreign Language http://bit.ly/Learn_Lang How to Use Mnemonic Devices http://bit.ly/Memory_StudyTips How to Get Better Search Results http://bit.ly/Google_Tips How to Study For a Test http://bit.ly/Study4Test How to Take a Test http://bit.ly/TakeTests How to Study Physics http://bit.ly/StudyTipsPhysics How to Study Programming http://bit.ly/Learn_Programming 10 Tips for Back to School http://bit.ly/BackToSchool_Tips 5 Reasons to go to Summer School http://bit.ly/SumrStudy If you love Socratica's videos and want to help support our work, consider wearing one of our comfy sweatshirts - as seen in our Study Tips series. Unisex design, machine washable. https://teespring.com/socratica-sweatshirts-are-here ΔΔΔΔΔΔΔΔΔΔΔΔ We Recommend the following Books and Study Supplies: Surely You’re Joking, Mr. Feynman! Hilarious and touching stories from Feynman himself. http://amzn.to/2oLdbZJ The Feynman Lectures on Physics (Feynman’s lectures from Caltech) http://amzn.to/2pk3L8i Cornell-notes style paper http://amzn.to/2dC9bUR Cornell Notes spiral notebook: http://amzn.to/2usl3ip Tomato Timer (use this for the Pomodoro Technique) http://amzn.to/2pMQhyA Moleskine 18 month planner http://amzn.to/2vCKhQl How to Read a Book - classic by Mortimer Adler and Charles Van Doren https://amzn.to/2QhAgxF Word Power Made Easy http://amzn.to/2no4W4s Merriam-Webster's Collegiate Dictionary http://amzn.to/2rSHz7O Roget’s Thesaurus http://amzn.to/2EvmFyf Pilot G2 Extra Fine Pens http://amzn.to/2wwFzSZ The Art of Learning by Josh Waitzkin (Chess Prodigy) http://amzn.to/2r952QB Amazon Used Textbooks - Save up to 90% http://amzn.to/2pllk4B ΔΔΔΔΔΔΔΔΔΔΔΔ Don’t forget to check out our FREE educational apps on the Google Play Store. http://bit.ly/2NjBl6j ΔΔΔΔΔΔΔΔΔΔΔΔ To support more videos from Socratica, visit Socratica Patreon https://www.patreon.com/socratica http://bit.ly/29gJAyg Socratica Paypal https://www.paypal.me/socratica We also accept Bitcoin! :) Our address is: 1EttYyGwJmpy9bLY2UcmEqMJuBfaZ1HdG9 ΔΔΔΔΔΔΔΔΔΔΔΔ Great Student: Liliana De Castro Written and Produced by Kimberly Hatch Harrison Products in this video: The Feynman Lectures on Physics, boxed set: The New Millennium Edition - http://amzn.to/2qJPHma Exercises for the Feynman Lectures on Physics - http://amzn.to/2qJQS5g Surely You're Joking, Mr. Feynman! (Adventures of a Curious Character) - http://amzn.to/2qBhnN8
Views: 184026 Socratica
Firewall - By Sathiya
 
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A small module in Cryptography and Network Security - Firewall is explained by Mrs. R Sathiya from AVS College of Technology, Salem. She is one of the top 25 winners of the National Teaching Video contest 2017 conducted by ICT Academy.
Views: 2937 Skycampus
Information & Network Security Lecture - - Substitution Techniques (Eng-Hindi)
 
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-~-~~-~~~-~~-~- Please watch: "PL vs FOL | Artificial Intelligence | (Eng-Hindi) | #3" https://www.youtube.com/watch?v=GS3HKR6CV8E -~-~~-~~~-~~-~-
Views: 39195 Well Academy
Security+ Online Training: Module 1 - Mitigating Threats
 
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25+ Hours of Training solely focused on getting you certified! Mentored training, exam reviews, multiple formats! Our students pass 95% of the time. You will too. Learn more: https://www.infosecinstitute.com/courses/comptia-securityplus-online/ MORE ON INFOSEC INSTITUTE Recognized as a 2018 Gartner Peer Insights Customers’ Choice for Security Awareness Computer-Based Training, InfoSec Institute fortifies organizations of all sizes against security threats with its award-winning security education solutions. Recognizing that cybersecurity is everyone’s job, the company provides skills training and certification prep courses for security professionals while building the entire workforce’s security aptitude through awareness training and phishing simulations. InfoSec Institute is a Training Industry “Top 20 IT Training Company” and the Security Training & Education Program Gold Winner in Info Security Products Guide’s Global Excellence Awards. Additional information can be found here: - SecurityIQ awareness and anti-phishing platform: https://www.infosecinstitute.com/securityiq/ - InfoSec training and certification: https://www.infosecinstitute.com/flex - InfoSec training and certification features: https://www.infosecinstitute.com/flex/pro/ - InfoSec training and certification guarantees: https://www.infosecinstitute.com/flex/guarantees/ - 100+ training and certification courses: https://www.infosecinstitute.com/courses
Views: 75792 InfoSec Institute
Hashing
 
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Hashing Watch More Videos at: https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited.
What is Hashing & Digital Signature in The Blockchain?
 
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What is Hashing & Digital Signature in The Blockchain? https://blockgeeks.com/ Today, we're going to be talking about the word blockchain and breaking it down to understand what does it mean when someone says, "Blockchain." What is hashing? Hashing refers to the concept of taking an arbitrary amount of input data, applying some algorithm to it, and generating a fixed-size output data called the hash. The input can be any number of bits that could represent a single character, an MP3 file, an entire novel, a spreadsheet of your banking history, or even the entire Internet. The point is that the input can be infinitely big. The hashing algorithm [00:01:00] can be chosen depending on your needs and there are many publicly available hashing algorithms. The point is that the algorithm takes the infinite input of bits, applies some calculations to them, and outputs a finite number of bits. For example, 256 bits. What can this hash be used for? A common usage for hashes today is to fingerprint files, also known as check zones. This means that a hash is used to verify that a file has not been [00:01:30] tampered with or modified in any way not intended by the author. If WikiLeaks, for example, publishes a set of files along with their MD5 hashes, whoever downloads those files can verify that they are actually from WikiLeaks by calculating the MD5 hash of the downloaded files, and if the hash doesn't match what was published by WikiLeaks, then you know that the file has been modified in some way. How does the blockchain make use of hashes? [00:02:00] Hashes are used in blockchains to represent the current state of the world. The input is the entire state of the blockchain, meaning all the transactions that have taken place so far and the resulting output hash represents the current state of the blockchain. The hash is used to agree between all parties that the world state is one in the same, but how are these hashes actually calculated? The first hash is calculated for the first block [00:02:30] or the Genesis block using the transactions inside that block. The sequence of initial transactions is used to calculate a block hash for the Genesis block. For every new block that is generated afterwords, the previous block's hash is also used, as well as its own transactions, as input to determine its block hash. This is how a chain of blocks is formed, each new block hash pointing to the block hash that came before it. This system of hashing guarantees that no transaction in the history can be tampered with because if any single part of the transaction changes, so does the hash of the block to which it belongs, and any following blocks' hashes as a result. It would be fairly easy to catch any tampering as a result because you can just compare the hashes. This is cool because everyone on the blockchain only needs to agree on 256 bits to represent the potentially infinite state of the blockchain. The Ethereum blockchain is currently tens of gigabytes, but the current state of the blockchain, as of this recording, is this hexadecimal hash representing 256 bits. What about digital signatures? Digital signatures, like real signatures, are a way to prove that somebody is who they say they are, except that we use cryptography or math, which is more secure than handwritten signatures that can be [00:04:00] easily forged. A digital signature is a way to prove that a message originates from a specific person and no one else, like a hacker. Digital signatures are used today all over the Internet. Whenever you visit a website over ACTPS, you are using SSL, which uses digital signatures to establish trust between you and the server. This means that when you visit Facebook.com, your browser can check the digital signature that came with the web page to verify that it indeed originated from Facebook and not some hacker. In asymmetric encryption systems, users generate something called a key pair, which is a public key and a private key using some known algorithm. The public key and private key are associated with each other through some mathematical relationship. The public key is meant to be distributed publicly to serve as an address to receive messages from other users, like an IP address or home address. The private key is meant to be kept secret and is used to digitally sign messages sent to other users. The signature is included with the message so that the recipient can verify using the sender's public key. This way, the recipient can be sure that only the sender could have sent this message. Generating a key pair is analogous to creating an account on the blockchain, but without having to actually register anywhere. Pretty cool. Also, every transaction that is executed on the blockchain is digitally signed by the sender using their private key. This signature ensures that only the owner of the account can move money out of the account.
Views: 24937 Blockgeeks
Modular Approach
 
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-- Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 579 Wan Zuhainis Saad
multimedia applications
 
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Views: 2508 GAURAV KUMAR
Information & Network Security Lecture -- Transposition Techniques (Eng-Hindi)
 
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The two techniques of transposition are shown in this video Method-1 : With key Method-2 : Without key -~-~~-~~~-~~-~- Please watch: "PL vs FOL | Artificial Intelligence | (Eng-Hindi) | #3" https://www.youtube.com/watch?v=GS3HKR6CV8E -~-~~-~~~-~~-~-
Views: 27212 Well Academy
CISSP Practice Questions of the Day from IT Dojo - #61 - Trusted Paths & Contingency Planning
 
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IT Dojo offers free CISSP study questions for those who are preparing for their certification every day. In today's CISSP questions of the day from IT Dojo, Colin Weaver asks and answers questions related to Trusted Paths and IT Contingency Planning. Relevant Links: Trusted Path - (See 3.3.2.1.1 and page 113) http://csrc.nist.gov/publications/history/dod85.pdf (See Page 4) https://www.fismacenter.com/sp800-34.pdf 7 Steps of IT Contingency Planning Process: ------------------------------------------- 1. Develop the contingency planning policy statement 2. Conduct the business impact analysis (BIA) 3. Identify preventive controls 4. Develop recovery strategies 5. Develop an IT contingency plan 6. Plan testing, training, and exercises 7. Plan maintenance Colin Note: (ICSM) Define Metrics to be Gathered (Contingency Planning Process) Develop Recovery Strategies (ICSM) Respond to management with mitigation steps (SDLC) Perform functional and secruity testing (Contingency Planning Process) Identifying Preventive Controls (SDLC) Obtain formal authorization to operate (ATO) Additional Study Resources: Below is a list of resources accumulated from the internet that we feel are valuable additions to your studying. CISSP Summary Version 2.0 https://media.wix.com/ugd/dc6afa_fc8dba86e57a4f3cb9aaf66aff6f9d22.pdf McGraw-Hill Education CISSP Practice Exams https://www.mhprofessionalresources.com/sites/CISSPExams/exam.php?id=AccessControl Study Notes and Theory This is a great website that has a lot of useful resources. https://www.studynotesandtheory.com Cybrary CISSP Course by Kelly Handerhan https://www.cybrary.it/course/cissp/ Brainscape CISSP Flashcards https://www.brainscape.com/subjects/cissp Quizlet CISSP Flashcards https://quizlet.com/2519918/cissp-practice-flash-cards/ Recommended Books: CISSP (ISC)2 Certified Information Systems Professional Official Study Guide 7th Ed. http://amzn.to/2rnjGAI CISSP All-In-One Study Guide 7th Ed. http://amzn.to/2pT3nde CISSP Study Guide 3rd Edition http://amzn.to/2qsBgDw Eleventh Hour CISSP 3rd Ed. Study Guide http://amzn.to/2pT3Dcc Disclaimer: https://www.itdojo.com/question-of-the-day-disclaimer/ http://www.seguetech.com/three-stages-disaster-recovery-sites/
Views: 3105 IT Dojo
square roots mod N part 1
 
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Views: 5330 Jeff Suzuki
In Cryptography: What is Confusion & What is diffusion
 
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Basic definition of confusion and diffusion in cryptography
Views: 39 Academic CSE
example of group theory : addition of modulo n
 
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topic covered : Example of group theory , Facebook page .. https://www.facebook.com/Math.MentorJi/ Graduate Math app :https://goo.gl/vo2Tj2 Examples of singularity : https://youtu.be/cgsB8Z5WSPk Riemann Sum : https://youtu.be/Z3Ecy2Zwukw Riemann Sum problems https://youtu.be/LKuZreMPiRQ infimum and supremum https://youtu.be/mK6NZznoZeg Dirichlet and able test https://youtu.be/WyoMpdh7f0c uniform convergence : https://youtu.be/_WWsMl0_9BI MN Test of uniform : https://youtu.be/r5yec-FtlUE
Views: 4064 Math Mentor
Linear Algebra - Motivations for linear algebra
 
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Mathematics for Machine Learning: Linear Algebra, Module 1 - Introduction to Linear Algebra and to Mathematics for Machine Learning To get certificate subscribe at: https://www.coursera.org/learn/linear-algebra-machine-learning/home/welcome ============================ Mathematics for Machine Learning: Linear Algebra: https://www.youtube.com/playlist?list=PL2jykFOD1AWazz20_QRfESiJ2rthDF9-Z ============================ Youtube channel: https://www.youtube.com/user/intrigano ============================ https://scsa.ge/en/online-courses/ https://www.facebook.com/cyberassociation/ About this course: In this course on Linear Algebra we look at what linear algebra is and how it relates to vectors and matrices. Then we look through what vectors and matrices are and how to work with them, including the knotty problem of eigenvalues and eigenvectors, and how to use these to solve problems. Finally we look at how to use these to do fun things with datasets - like how to rotate images of faces and how to extract eigenvectors to look at how the Pagerank algorithm works. Since we're aiming at data-driven applications, we'll be implementing some of these ideas in code, not just on pencil and paper. Towards the end of the course, you'll write code blocks and encounter Jupyter notebooks in Python, but don't worry, these will be quite short, focussed on the concepts, and will guide you through if you’ve not coded before. At the end of this course you will have an intuitive understanding of vectors and matrices that will help you bridge the gap into linear algebra problems, and how to apply these concepts to machine learning. Who is this class for: This course is for people who want to refresh their maths skills in linear algebra, particularly for the purposes of doing data science and machine learning, or learning about data science and machine learning. We look at vectors, matrices and how to apply these to solve linear systems of equations, and how to apply these to computational problems. ________________________________________ Created by: Imperial College London Module 1 Introduction to Linear Algebra and to Mathematics for Machine Learning In this first module we look at how linear algebra is relevant to machine learning and data science. Then we'll wind up the module with an initial introduction to vectors. Throughout, we're focussing on developing your mathematical intuition, not of crunching through algebra or doing long pen-and-paper examples. For many of these operations, there are callable functions in Python that can do the adding up - the point is to appreciate what they do and how they work so that, when things go wrong or there are special cases, you can understand why and what to do. Less Learning Objectives • Recall how machine learning and vectors and matrices are related • Interpret how changes in the model parameters affect the quality of the fit to the training data • Recognize that variations in the model parameters are vectors on the response surface - that vectors are a generic concept not limited to a physical real space • Use substitution / elimination to solve a fairly easy linear algebra problem • Understand how to add vectors and multiply by a scalar number
Views: 2777 intrigano
Introduction to channel capacity | Journey into information theory | Computer Science | Khan Academy
 
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Introduction to Channel Capacity & Message Space Watch the next lesson: https://www.khanacademy.org/computing/computer-science/informationtheory/moderninfotheory/v/how-do-we-measure-information-language-of-coins-10-12?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/informationtheory/moderninfotheory/v/symbol-rate-information-theory?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: 51040 Khan Academy Labs
Congruence and Fermat’s little theorem
 
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Introduction to congruence and the terminology used. Fairly basic with emphasis on the arithmetic of remainders. Examples of the addition and multiplication rules for congruence. Powers and Fermat’s little theorem. Lastly an example solved using Fermat’s little theorem.
Views: 87814 DLBmaths
Map of Computer Science
 
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The field of computer science summarised. Learn more at this video's sponsor https://brilliant.org/dos Computer science is the subject that studies what computers can do and investigates the best ways you can solve the problems of the world with them. It is a huge field overlapping pure mathematics, engineering and many other scientific disciplines. In this video I summarise as much of the subject as I can and show how the areas are related to each other. You can buy this poster here: North America: https://store.dftba.com/products/map-of-computer-science-poster Everywhere else: https://www.redbubble.com/people/dominicwalliman/works/27929629-map-of-computer-science?p=poster&finish=semi_gloss&size=small Get all my other posters here: https://www.redbubble.com/people/dominicwalliman A couple of notes on this video: 1. Some people have commented that I should have included computer security alongside hacking, and I completely agree, that was an oversight on my part. Apologies to all the computer security professionals, and thanks for all the hard work! 2. I also failed to mention interpreters alongside compilers in the complier section. Again, I’m kicking myself because of course this is an important concept for people to hear about. Also the layers of languages being compiled to other languages is overly convoluted, in practice it is more simple than this. I guess I should have picked one simple example. 3. NP-complete problems are possible to solve, they just become very difficult to solve very quickly as they get bigger. When I said NP-complete and then "impossible to solve", I meant that the large NP-complete problems that industry is interested in solving were thought to be practically impossible to solve. And free downloadable versions of this and the other posters here. If you want to print them out for educational purposes please do! https://www.flickr.com/photos/[email protected]/ Thanks so much to my supporters on Patreon. If you enjoy my videos and would like to help me make more this is the best way and I appreciate it very much. https://www.patreon.com/domainofscience I also write a series of children’s science books call Professor Astro Cat, these links are to the publisher, but they are available in all good bookshops around the world in 18 languages and counting: Frontiers of Space (age 7+): http://nobrow.net/shop/professor-astro-cats-frontiers-of-space/ Atomic Adventure (age 7+): http://nobrow.net/shop/professor-astro-cats-atomic-adventure/ Intergalactic Activity Book (age 7+): http://nobrow.net/shop/professor-astro-cats-intergalactic-activity-book/ Solar System Book (age 3+, available in UK now, and rest of world in spring 2018): http://nobrow.net/shop/professor-astro-cats-solar-system/? Solar System App: http://www.minilabstudios.com/apps/professor-astro-cats-solar-system/ And the new Professor Astro Cat App: https://itunes.apple.com/us/app/galactic-genius-with-astro-cat/id1212841840?mt=8 Find me on twitter, Instagram, and my website: http://dominicwalliman.com https://twitter.com/DominicWalliman https://www.instagram.com/dominicwalliman https://www.facebook.com/dominicwalliman
Views: 1573631 Domain of Science
Step 1: Is a Modular Classroom Right for My Organization
 
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Learn more at: http://usedmodularclassrooms.com/
Views: 146 John Moosbrugger
Information Security IV - Introduction
 
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ABOUT THE COURSE: Short evaluation on scripting, Networking basics (Contents of IS L3) -Introduction to Kali Linux - Layer 2 and Layer 3 Discovery using Kali Linux with demo/practice -Layer 4 discovery using Kali Linux with demo/practice - Port scanning feature in Kali Linux with demo/practice - Finger printing (Specific OS details and vulnerabilities) in Kali Linux with demo/practice - DoS and Web Application Scanning in Kali Linux with demo/practice - Automating Kali Linux with tools - Network Forensics: An introduction and acquisition of evidence - Analysis and tools of network packets and flows - Unplugged: Wireless Network Forensics Tools and Scripts -Network Forensics: Intrusion and Detection using Snort tool - Network Forensics: Network devices(Switches,Routers, Firewalls) and Proxies. COURSE INSTRUCTOR Prof. V.Kamakoti Department of Computer Science and Engineering, IIT Madras specializes in the area of Computer Architecture and Secure Hardware Design. He is an advisor for many security critical organizations including Banking Institutions. He completed his Master of Science (By research) and PhD at the Department of Computer Science and Engineering, IIT Madras in the years 1992 and 1995 respectively. He completed his BE in Computer Science and Engineering from Sri Venketaswara College of Engineering (Affiliated to University of Madras) in the year 1989. He is a coordinator of the Information Security Education and Awareness program of the Department of Information Technology, Government of India Prof. Shankar Raman completed his BE (Computer Science and Engineering) from Sri Venkateswara College of Engineering, University of Madras. He obtained his M Sc (Engineering) from Indian Institute of Science Bangalore, and Ph. D. from Indian Institute of Technology Madras. He has about 2 and half decades of Industrial experience working for Companies such as Wipro Infotech R&D, HCL HP R&D, and HCL Cisco Offshore Development Centre. Shankar Raman has successfully created two startup companies: one in the area of consulting, and the other in the area of Network Storage product development. He is currently with RISE Lab in the Department of Computer Science and Engineering, IIT Madras. He has published about 20 research papers in the areas of VLSI Design, Computer Architecture, Networking, Software Testing, Internet Power Consumption, and holds a well cited patent in the area of Network Security. Prof. Vasan holds an undergraduate and masters degree from BITS Pilani and have been working in the IT Industry for close to 25 years now. Vasan has been working with different leading IT companies in many capacities both in India and abroad in the areas of network management, network appliance development and security domains. He has been working close to 7 years with Cisco Systems and have been part of the engineering of different Cisco products. He has also been involved with engineering a network storage appliance product for a start up company. Currently, Vasan is acting as a senior technical consultant for different organisations and institutions like Secure engineering group in the Computer Science department of IIT (Chennai) in designing and developing indigenous technology solutions in the areas of network and security under the ‘Make in India’ initiative. As part of professional career, Vasan has also been associated in delivering training programs in the areas of Operating System, Computer Networks, Programming Languages, Network Security and Storage Networking to top IT service companies in India as well as premier educational universities.
Modularity - The Language Learning Process - Second Language Acquisition (Lecture 09)
 
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The Language Learning Process Modularity Modularity or Unitary Piaget's View Chomsky's view Linguists today Second Language Acquisition
Risk Definitions  (CISSP Free by Skillset.com)
 
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This Risk Management concepts training video covers Risk Definitions and Terminology. It is part of the CISSP FREE training course from Skillset.com (https://www.skillset.com/certifications/cissp). Skillset helps you pass your certification exam. Faster. Guaranteed. https://www.skillset.com Topic: Risk Definitions Skill: Risk Management Concepts Skillset: Security and Risk Management Certification: CISSP Join the 40,000+ candidates in over 58 countries that have found a faster, better way to pass their certification exam. + Unlimited access to thousands of practice questions + Exam readiness score + Smart reinforcement + Focused training ensures 100% exam readiness + Personalized learning plan + Align exam engine to your current baseline knowledge + Eliminate wasted study time + Exam pass guarantee And much more - https://www.skillset.com
Views: 4139 Skillset
Module 3: The Medium & The Message | Social Enterprise Marketing Toolkit
 
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In this third module of the Social Enterprise Marketing Toolkit, you'll learn about the various media available to you for marketing, and the relative merits of each of them. You'll also build your own Message Matrix, a useful tool that captures your social enterprise's key messages, and acts as a touchstone for marketing outreach.
Views: 909 OctopusStrategies
CISSP Domain 4 l Network Security and Communication - Part 3 l CISSP Certification l ARECyber LLC
 
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CISSP Domain 4 l Network Security and Communication - Part 3 l CISSP Certification l ARECyber LLC Communication and Network Security Domain 4 of the CISSP certification course offered by ARECyber. This domain provides an introduction to the Communications and Network Security. A well-designed network will use a single authentication method for all services. In this video, you'll learn how IPSEC, RADIUS, TACACS and Kerberos can be used to centralize the authentication process with remote access processes. CISSP Certification Training: #cissptrainingvideos2017 #cissp #cissptraining #cisspcertification #cissptrainingvideos #cissptutorial After completing this domain, you will be able to: ● Describe the various secure network architectures and designs ● Recognize the importance of securing network components ● List the different secure communication channels ● List the common network attacks and the countermeasures ARECyber's CISSP certification training is aligned to the (ISC) ² CBK 2015 and trains you in the industry's latest best practices, which will help you ace the exam in the first attempt. The certification helps you develop the expertise in defining the architecture, in designing, building, and maintaining a secure business environment for your organization using globally approved Information Security standards. What are the course objectives? By the end of this training, you will: 1. Be able to define the architecture, and design and manage the security of your organization. 2. Acquire the relevant knowledge and skills required to clear the CISSP certification exam. 3. Earn the requisite 30 CPEs required to take up the CISSP certification exam. 4. Develop working knowledge in the 8 domains areas prescribed by the CISSP Common Book of Knowledge, 2015. Who should take this course? The CISSP certification is a globally recognized professional requirement in the IT Security domain. This certification is best-suited for: 1. Security Consultants/Managers 2. IT Directors/Managers 3. Security Auditors/Architects 4. Security Systems Engineers 5. Chief Information Security Officers 6. Network Architects FOLLOW ME: Support Continued Creation: https://www.patreon.com/arecyber Website: https://arecyber.com Twitter: https://twitter.com/artofwar73 Facebook: https://www.facebook.com/ARECyberLLC/ Instagram: https://goo.gl/BrLMMk Visualize Success and you will Succeed!
Views: 633 ARECyber LLC
Certification and Accreditation (CISSP Free by Skillset.com)
 
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The Certification and Accreditation video is part of the CISSP FREE training course from Skillset.com (https://www.skillset.com/certifications/cissp). Skillset helps you pass your certification exam. Faster. Guaranteed. https://www.skillset.com Topic: Certification and Accreditation Skill: Information Security Evaluation Models Skillset: Security Engineering Certification: CISSP Join the 40,000+ candidates in over 58 countries that have found a faster, better way to pass their certification exam. + Unlimited access to thousands of practice questions + Exam readiness score + Smart reinforcement + Focused training ensures 100% exam readiness + Personalized learning plan + Align exam engine to your current baseline knowledge + Eliminate wasted study time + Exam pass guarantee And much more - https://www.skillset.com
Views: 3878 Skillset
What is SECURITY ENGINEERING? What does SECURITY ENGINEERING mean?
 
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What is SECURITY ENGINEERING? What does SECURITY ENGINEERING mean? SECURITY ENGINEERING meaning - SECURITY ENGINEERING definition - SECURITY ENGINEERING explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Security engineering is a specialized field of engineering that focuses on the security aspects in the design of systems that need to be able to deal robustly with possible sources of disruption, ranging from natural disasters to malicious acts. It is similar to other systems engineering activities in that its primary motivation is to support the delivery of engineering solutions that satisfy pre-defined functional and user requirements, but with the added dimension of preventing misuse and malicious behavior. These constraints and restrictions are often asserted as a security policy. In one form or another, security engineering has existed as an informal field of study for several centuries. For example, the fields of locksmithing and security printing have been around for many years. Due to recent catastrophic events, most notably 9/11, Security Engineering has quickly become a rapidly growing field. In fact, in a recent report completed in 2006, it was estimated that the global security industry was valued at US$150 billion. Security engineering involves aspects of social science, psychology (such as designing a system to 'fail well' instead of trying to eliminate all sources of error) and economics, as well as physics, chemistry, mathematics, architecture and landscaping. Some of the techniques used, such as fault tree analysis, are derived from safety engineering. Other techniques such as cryptography were previously restricted to military applications. One of the pioneers of security engineering as a formal field of study is Ross Anderson.
Views: 1806 The Audiopedia
Certificate Revocation List  Distribution Point - Etechtraining.com
 
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Certificate Revocation List Distribution Point - Etechtraining.com
Views: 278 Myrl Whitney
Theory of Computation Chapter 1
 
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Prof.T.Benil Department of CSE PONJESLY COLLEGE OF ENGINEERING
Views: 788 ponjesly cse
Man In The Middle Attack Explanation In Hindi 🔥🔥
 
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Hello Guys !! I hope you all doing well. In this video I will explain Man In The Middle Attack Or MITM along with MITB (Man in the browser) attack so that you can keep yourself safe from these type of cyber attacks. This is a explanation video only and I hope you will understand easily. MITM is carried out between two users, two computers, a computer and a network, two networks, a client and a server and 2 clients. ============================================== ▶ Stay Safe On Internet ▶ Stay Legal Always ▶ Learn Ethical Hacking, Tips n Tricks, Cyber Security On My Channel With Regular Videos ▶ This video is only for Educational & Informational purpose please do not misuse because that can land you in Jail. ===================================================== Thank you all for your this much love & support !! Keep Supporting ! Enjoy this Educational video !! LIKE || SHARE || SUBSCRIBE || PRESS THE BELL ICON Subscribe free here for more tech videos : https://goo.gl/pWWjPF (Its mean a lot to me ; Thank You) ---------CONNECT WITH ME-------------- ♥️ Twitter - https://goo.gl/wsmezo ♥️ Facebook- https://goo.gl/NSdiAa ♥️ Instagram - https://goo.gl/RRxMbk ------------------------------------------------------------- Do not forget to Subscribe "Technical Navigator" Guys | Daily 1 Video | Tech Videos | Ethical Hacking Videos | Tips N Tricks | My Opinion On Gadgets | Cyber Security | Thank you all. You guys Motivate me. Lets Make India Technical ============================================ ====================================================== DISCLAIMER : THIS VIDEO IS FOR EDUCATIONAL PURPOSE ONLY. Please do not use this method for illegal or malicious activities because hacking is crime.if you do this then it's can land you in jail. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. ======================================================
Views: 2641 Technical Navigator
What are Honeypots ? A Net Trap For Hackers 🔥😱
 
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Hello Guys !! I hope you all doing well. In this video I will be explaining about Honeypot, A trap for Hackers set by another Hacker or an organization to record and monitor the activities of hackers and to trace them. Watch the full video for information. ============================================== ▶ Stay Safe On Internet ▶ Stay Legal Always ▶ Learn Ethical Hacking, Tips n Tricks, Cyber Security On My Channel With Regular Videos ===================================================== Thank you all for your this much love & support !! Keep Supporting ! Enjoy this Educational video !! LIKE || SHARE || SUBSCRIBE || PRESS THE BELL ICON Subscribe free here for more tech videos : https://goo.gl/pWWjPF (Its mean a lot to me ; Thank You) ---------CONNECT WITH ME-------------- ♥️ Twitter - https://goo.gl/wsmezo ♥️ Facebook- https://goo.gl/NSdiAa ♥️ Instagram - https://goo.gl/RRxMbk ------------------------------------------------------------- Do not forget to Subscribe "Technical Navigator" Guys | Daily 1 Video | Tech Videos | Ethical Hacking Videos | Tips N Tricks | My Opinion On Gadgets | Cyber Security | Thank you all. You guys Motivate me. Lets Make India Technical ============Some Of My Must Watch Videos============== 1. How To Get Cash Without ATM Card From ATM MACHINE (Hindi ) : https://goo.gl/gdaApQ 2. How To Get Free Domain Name For Lifetime For Your Website !! : https://goo.gl/qmEzgP 3. Redmi 4 Unboxing 2017 !! : https://goo.gl/CpcG8x 4. You Will Not Believe This After Watching !! : https://goo.gl/TKTbxH 5. 20 Second Me Phone Hacked ?? Fact Check : https://goo.gl/oVp662 ======================================================
Views: 1081 Technical Navigator
Plain Text to Cipher Text Substitution Method. By Sabihuddin Ahmed
 
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Educational And Professional Training Videos. | JAVA | C# | ANDROID | ASP.NET | O' Level Computer Science for IGCSE & GCSE | A' Level Computer Science | A' Level Applied Information And Communication Technology |
Ethical Hacking Tutorials In Hindi Class-8 (Part 10) | What is Spoofing Explained
 
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Hello Friends in This Class We Will Learn About Spoofing Like What is Spoofing And Different Types of Spoofing Attack Explanation in Hindi. Follow Us On Facebook link https://www.facebook.com/TechnicalExpertHackers/ Like Share and Subscribe YouTube Channel For more Videos https://youtu.be/fxvJc0kBV64 Kali Linux First Class https://youtu.be/H9UIaua7Nwk?list=PLAaMs54jGf5VinRN1DayB6or_FKEMk5JI Ethical Hacking Course In Hindi Series https://youtu.be/v4DfOwN_Yac?list=PLAaMs54jGf5V7-2nn2RkKCfaWhw1InRIF Ethical Hacking In English Series https://youtu.be/odaHqorKKyw?list=PLAaMs54jGf5W_yRcUwVk8LoeJ1oXLTwhr [Note : This Video Is For Education Purpose. I Am Not Harming Any Computer Or Website During This Video So Please Don't Try To Harm Anyone If You Will Do That You May Be Responsible For Your Act.]