The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet

David Kahn's newest book updates his previous work, which sits on every Cryptographer's, Cryptanalyst's, and government Special Intelligence officer's bookshelf in the entire world. If you REALLY want to how ciphers, codes, and systems are broken, Kahn is the author who tells you. Any person knowledgable in the field of Cryptology or Intelligence will tell you that Kahn' book has never been equalled. It is known as "The Bible of Cryptology" within the field.

From early Sparta and Rome to the present day, the strengths and weaknesses of systems and devices are presented in clear, concise terms -- occassionally with a bit of levity, where appropriate. Novices in the field will find much useful -- and highly interesting -- information. Professionals always find reminders of the fallability of "unbreakable" systems.

Kahn's writing style is clear, concise, and analytical. It is never boring.

I was employed by a maker of Cryptographic equipment, and was authorized to discuss key generator and cipher system issues with the heads of national governments. A copy of "Codebreakers" was our most requested -- and welcomed gift. That speaks more eloquently than any words I might craft.

The 1967 edition of this book is and always will be a classic. What a disappointment to find that this new edition offers such a poor updating of new information which has come to light over the last the 30 years. If the revelations of the 1970s about the Enigma decrypts and the Bletchley Colossus machines did not warrant at least a major chapter, what does? (They get only brief treatment in the new 15 page addendum.) Numerous other omissions come to mind. This book deserved better for its new edition.