cryptology

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Letter frequency analysis of a Vigenère cipher

Frequency distribution for plaintext and its repeated-key Vigenère cipher

U.S. Army cipher disk

Hagelin M-209 cipher machine

How William Friedman Tried to Prove That Francis Bacon Wrote Shakespeare's Plays

Purple cipher machine

Jade cipher machine

cryptology: Related Content

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Photos and Videos

Letter frequency analysis of a Vigenère cipher

Frequency distribution for plaintext and its repeated-key Vigenère cipher

U.S. Army cipher disk

Hagelin M-209 cipher machine

Purple cipher machine

Jade cipher machine

DES flow diagram

How William Friedman Tried to Prove That Francis Bacon Wrote Shakespeare's Plays

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cryptanalysis cryptography decryption information theory data encryption mathematics analysis probability theory computer science combinatorics algebra statistics geometry automata theory set theory trigonometry

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William F. Friedman

American cryptologist

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Elizebeth S. Friedman

American cryptologist

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Agnes Meyer Driscoll

American cryptologist

Yardley, Herbert Osborne

Herbert Osborne Yardley

American cryptologist

A botanical illustration from the Voynich manuscript, a codex, scientific or magical text in an unidentified language, in cipher; end of the 15th or during the 16th century (?).

Codes, Secrets, and Ciphers Quiz