Along with breaking the Japanese diplomatic cryptosystem, usually referred to as "PURPLE," probably the greatest example of Allied cryptanalytic success in Worl

Why do some cryptographic systems fail and others succeed? Stephen Kelley's new book, Big Machines, explores this fundamental question of cryptology by examinin

The breaking of the Enigma machine is one of the most heroic stories of the Second World War and highlights the crucial work of the codebreakers of Bletchley Pa

This book offers an introduction to cryptology, the science that makes secure communications possible, and addresses its two complementary aspects: cryptography

This publication joins two cryptologic history monographs that were published separately in 1989. In part I, the author identifies and presents a thorough accou