Kevin Sands, author of The Blackthorn Key, picks his favourite keys, codes and ciphers throughout history, from the Caesar shift to the Enigma machine If knowledge is power, then the key to power lies ...
The answer to the riddles are then used as keys to a Caesar shift cipher. So for cipher #1 we use 19 as the key and replace each letter with the one 19 places before it in the alphabet. You could do ...
Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...
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