A four-thousand-year history of cryptography ranges from the time of the ancient Egyptian pharaohs to the present, explaining encryption's development and evolution, looking at ...

xn + yn = zn, where n represents 3, 4, 5, ...no solution "I have discovered a truly marvelous demonstration of this proposition which this margin is too narrow to contain ...

Explains how to make and break several kinds of codes, how to use secret languages and how to make invisible inks.

Originally published in England and cowritten with her father, "In Code" is "a wonderfully moving story about the thrill of the mathematical chase" ("Nature") and "a paean to ...

Elementary account of ciphers, history, types, etc., with 151 examples of ciphers and codes. Solutions. Good introduction for beginners.

Explains various methods used in cryptography and presents examples to help readers in breaking secret codes