More Cryptography

• Thomas Jefferson ~1795

• Wheel Cipher

• ABCDEFGHIJKLMNOPQRSTUVWXYZ Plaintext

• GJTXUVWCHYIZKLNMARBFDOESQP W00

• IKMNQLPBYFCWEDXGZAJHURSTOV W01

• HJLIKNXWCGBDSRVUEOFYPAMQZT W02

• PYOFGUQHXSZACNDMRTVWEJBLIK W03

• ...

• BDFONGHJIKLSTVUWMYEPRQXZAC Wn

• Line up the intended message on the wheels

• Read off another line

• Wheels with automatic turning mechanisms

• More and more wheels

• Brass contacts on wheels in electric typewriters

• Pretty soon, you had the Enigma Cipher

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