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Enigma cipher machines have endured in the minds of history buffs and cryptography hobbyists for more than a century, still discovered at dusty French flea markets and dredged up from under beach ...

This project implements the classical Playfair cipher, a manual symmetric encryption technique based on digraph substitution. The program generates a 5×5 key matrix from a user-provided key (with the ...

conversion_factor = 1822.888486 # conversion from atomic units to electron mass as a unit of mass - used for atomic masses fileroot = sys.argv[1] infile = open ...