A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case. The Enigma machine is more complex but is still fundamentally a polyalphabetic substitution cipher. (Wikipedia).
Rahul Savani: Polymatrix Games Algorithms and Applications
Polymatrix games are multi-player games that capture pairwise interactions between players. They are defined by an underlying interaction graph, where nodes represent players, and every edge corresponds to a two-player strategic form (bimatrix) game. This talk will be a short survey that w
From playlist HIM Lectures: Trimester Program "Combinatorial Optimization"
More arithmetic with polynumbers | Arithmetic and Geometry Math Foundations 59 | N J Wildberger
Polynumbers are extensions of numbers, but with a richer arithmetic. We will use them to provide a more solid foundation for the study of polynomials. Here we look at multiplying a positive polynumber by a scalar or number, connecting the multiplication of polynumbers with ordinary multip
From playlist Math Foundations
Cryptanalysis of Classical Ciphers
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
Polyalphabetic cipher | Journey into cryptography | Computer Science | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher Brit introduces the polyalphabetic cipher, which creates a lighter fingerprint than the Caesar ci
From playlist Journey into cryptography | Computer Science | Khan Academy
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security
Cryptography Lecture 2, Substitution Ciphers
From playlist Calculus I
Solving a Linear Equation with Variables on Both Sides—On the Number Line! #clotheslinemath
Check out the main channel @polymathematic ! I recently posted a universally-beloved video (🙄) on solving a simple linear equation using the number line. (You can see just how beloved here: https://www.youtube.com/shorts/4idiVmAyfy8). It was so beloved, in fact, that I had to do a follow
From playlist polymathematic #shorts
Three-digits square trick #shorts
Check out the main channel @polymathematic ! If you're strong at two-digit multiplication, you can leverage that into this trick for squaring three-digit numbers ending in 5. Subscribe: https://bit.ly/polymathematic | Enable ALL push notifications 🔔 There are only two steps to this tri
From playlist polymathematic #shorts
What is a Polygon? | Don't Memorise
To learn more about Polygons, enroll in our full course now: https://infinitylearn.com/microcourses?utm_source=youtube&utm_medium=Soical&utm_campaign=DM&utm_content=MPYNEYeLYaQ&utm_term=%7Bkeyword%7D In this video, we will learn: 0:00 what is a polygon? To watch more videos related to G
From playlist Area of a Regular Polygon
Black Hat USA 2010: Voyage of the Reverser: A Visual Study of Binary Species 3/5
Speakers: Greg Conti, Sergey Bratus When analyzing large binary objects such as process memory dumps, proprietary data files, container file formats, and network flow payloads, security researchers are limited by the tiny textual window a hex editor and common command line utilities typic
From playlist REVERSE ENGINEERING REDUX
Arithmetic with positive polynumbers | Arithmetic and Geometry Math Foundations 58 | N J Wildberger
Polynumbers are extensions of the positive numbers 0,1,2,3... and have an arithmetic which is the same as that of polynomials. In fact polynumbers present us with a more logical and fundamental approach to polynomial arithmetic. This video presents some basic definitions, such as the degr
From playlist Math Foundations
The Division algorithm for polynumbers | Arithmetic + Geometry Math Foundations 64 | N J Wildberger
We review our approach to natural numbers, integers, fractions and rational numbers. Then we consider the analogous objects for polynumbers. Division of integral polynumbers is similiar to long division of ordinary numbers. There are two approaches: one starting with lower order terms, the
From playlist Math Foundations
The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/caesar-cipher Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with
From playlist Journey into cryptography | Computer Science | Khan Academy
singingbanana's codebreaking challenge solution
The winner and solution to the codebreaking challenge.
From playlist My Maths Videos
Cryptography Explained: The Science of Code
Ever seen the Da Vinci Code? You might be interested in Cryptography! There are lots of different ways to encrypt a message, from early, simple ciphers to the famous Enigma machine. Michael Aranda takes you through a fun and cryptic episode of SciShow, all about codes! ---------- SciShow h
From playlist Uploads
Area of a Regular Polygon: 2 Conceptual Approaches
Links: https://www.geogebra.org/m/aHvgEm9v https://www.geogebra.org/m/wxJFqM9P
From playlist Geometry: Dynamic Interactives!
What does 1/0 ACTUALLY equal? #shorts #maths
Check out the main channel @polymathematic ! Math teachers always say you can't divide by 0, but why not? What would happen if we did divide by zero? Subscribe: https://bit.ly/polymathematic | Enable ALL push notifications 🔔 There are actually two cases that we have to consider: dividi
From playlist polymathematic #shorts
NOTACON 3: Kryptos and The Da Vinci Code
Speaker: Elonka Dunin In a courtyard at CIA Headquarters stands an encrypted sculpture called Kryptos. Its thousands of characters contain encoded messages, three of which have been solved. The fourth part, 97 or 98 characters at the very bottom, have withstood cryptanalysis for over a de
From playlist NOTACON 3
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptogr
From playlist Journey into cryptography | Computer Science | Khan Academy
Multiplying Roman Numerals the Ancient Way #shorts
Check out the main channel @polymathematic ! Because the Roman numeral system doesn't rely on place value like our decimal number system, it can be very hard to multiply two numbers together. There are various workarounds you can do with distribution and looking up values in tables, but t
From playlist polymathematic #shorts