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Franklin's 13 Virtues
Order
Classification
Typologies
Types
Types of Number
Prime Numbers
Cryptography
Cryptanalysis (Codebreaking)
Attachments
Cryptanalysis
Parents
Cryptography
Children
Bletchley Park
Bomba (1932 Polish Enigma cracker)
Cipher Bureau (Poland, Biuro Szyfrów)
Codebreaking Successes
Cryptographers
Elizebeth (Smith) Friedman
How a Computer Saved the World
Julia Parsons
Rubber Hose Cryptanalysis
Three Bs of Codebreaking
William F. Friedman