Cryptographers are diversified in every way. Hardly a trade or profession has missed representation among us. Formal education seems totally unrelated to the curious talent. Once a year members and friends, experts and novices, gather at a Convention. Many meet for the first time, although they may be old friends by mail.
New enthusiasm is generated for the hobby as mutual help is given and experience is shared.
Good descriptions of the mechanics of cryptanalysis, with emphasis on the people involved. Clear, concise descriptions of many ciphers and how to attack them. This book contains a well-written description of several ciphers. More limited range than Gaines, but the treatment is deeper, with extremely good analysis of the mathematics involved. The Aegean Park Press, PO Box 2837, Laguna Hills, California 92653, has an extensive list of publications in the field of cryptanalysis.