Los Angeles Math Circle

1/29 -- LAMC Beginners: CryptoClub III / Modular Arithmetic

Having looked at some of the classical ciphers, we'll shift attention to the foundation of modern public-key cryptography (and a really cool area of math in its own right), modular arithmetic.

UPDATE: Homework is to completely decrypt one or both of the Vigenere ciphers in the Crypto packet (see previous week for handout). Also if you were not present in class, read the Modular Arithmetic packet up to Problem 1, and try to solve Problem 1. (We will continue work on the rest of it next meeting.)