Discrete Structures: Modular Arithmetic & Simple Ciphers

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In this session we'll introduce modular arithmetic and apply the principles to simple crytographic ciphers such as the shift cipher (also called the Caesar cipher) and the linear cipher.

Barry Brown

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this python .... really asks you to switch your brain from doing programming to doing mathematics it completely abstracts the coding step, very different from doing numerical methods in C/C++ it feels like doing math on the paper, anyways an identifier as in the name of a variable is technically a named location the name exists only in the compiler world the location exists in the process memory and finally it will be mapped to real RAM, so all in all a identifier is a name for a location in RAM same applies to function names they to are treated like named locations they have a start and an end in memory when you call a func the compiler actually moves the Instruction Pointer there and at the same time it loads some registers with the arguments you passed then proceeds executing the code

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