- Breaking the German Code - The Enigma Machine
- Directory for Enigma cipher machine, its decryption, simulators, and related topics. From University of Buffalo, New York. - Ciphers: The Enigma Machine
- Includes photos, articles, links, and software simulators of Enigma. - Codes and Ciphers in the Second World War: The Enigma
- Offers an explanation of how the machine worked, as well as an introduction to substitution ciphers. - Crypto Machines: Enigma
- Resources for encrypting and decrypting machines featuring photographs and history, with French and Polish accounts of the Enigma story. - Cryptography: Enigma Cipher
- Outlines the workings of the Enigma cipher. Enigma and the Codebreakers
- Online exhibit from the Imperial War Museum.- Enigma Machine
- Provides background and links for the WW II German cipher machines, Enigma. - Enigma Machine and Other Examples of Cryptography and Mathematics
- Offers information on the history and mathematics of the Enigma machine, as well resources on other applications of cryptography. - Enigma-E
- Do-it-yourself kit for building a fully operational electronic Engima coding machine. - German Enigma Cipher Machine, The
- Presents a history of the work to break the Enigma code. Also in Polish. - Machines Behind the Codes
- Description of Enigma and the Bombe, from Bletchley Park. - Myke Predko's Enigma Code/Decode Page
- Includes history, an Enigma simulator, as well as collection of interesting tales in the history of espionage. Turing Bombe@
- Learn about Turing Bombe, an electromechanical device used by British cryptologists to decode German Enigma machine signals during the WW II. Sites feature history, source code, virtual model, and about Alan Turing, the designer of the device which played a significant role during war times.- Turing's Treatise on Enigma
- Document written by the late Dr. Alan Turing while working as a cryptanalyst at Bletchley Park. - U-boat Net Technologies: Enigma
- Presents links, a guide to naval Enigma ciphers, and an explanation of the Allied breaking of the naval Enigma code. - Wikipedia: Enigma Machine
- Hyperlinked article about the cypher machine. Includes notes on the operation and history of the machine, including its use by German military forces.
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