This fantastic book is a brilliant introduction to cryptography,
complete with concise and simple explanations covering transposition and
substitution ciphers, codes, and their solutions. Contained within this
book are more than 150 cryptographic problems providing practical
applications as well of tests of ingenuity - a must-have for any
aspiring cryptographer. As well as showing a detailed history of
cryptography throughout the years, this effective book gets the reader
solving problems with various cryptographic methods, starting simply and
progressing to tasks of incredible complexity. Clear and concise, this
book is a definitive introduction to the field and deserves a place in
any cryptographic library. Originally published in 1955, this scarce
book is proudly republished now with an introductory biography of the
author.