Los Angeles Math Circle

5/12 -- Beginners: Modular Arithmetic and Ciphers

Over the past two weeks we have been studying divisibility and the Chinese remainder theorem, but up until not we have been looking at them as purely mathematical problems with no regard towards any applications. This weekend we'll be talking about one very important of molecularity, cryptography. Cryptography is the study of how we can conceal information in such a way so that it can be perfectly uncovered by the right person, and look like gibberish to everyone else.

Handouts: