Encryption Devices: Purple, Communications Security, Scytale, Cryptostick, Lorenz Cipher, M-209, Jefferson Disk, Sigsaly, Red, Fish Source Wikipedia

ISBN: 9781156457108

Published: August 13th 2011

Paperback

32 pages


Description

Encryption Devices: Purple, Communications Security, Scytale, Cryptostick, Lorenz Cipher, M-209, Jefferson Disk, Sigsaly, Red, Fish  by  Source Wikipedia

Encryption Devices: Purple, Communications Security, Scytale, Cryptostick, Lorenz Cipher, M-209, Jefferson Disk, Sigsaly, Red, Fish by Source Wikipedia
August 13th 2011 | Paperback | PDF, EPUB, FB2, DjVu, talking book, mp3, ZIP | 32 pages | ISBN: 9781156457108 | 9.29 Mb

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 31. Chapters: Purple, Communications security, Scytale, CryptoStick, Lorenz cipher, M-209, Jefferson disk, SIGSALY,MorePlease note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 31. Chapters: Purple, Communications security, Scytale, CryptoStick, Lorenz cipher, M-209, Jefferson disk, SIGSALY, Red, Fish, Siemens and Halske T52, Code-O-Graph, Cipher disk, Edward Hebern, Alberti cipher disk, C-52, Sect ra Secure Module, Kryha, M-94, Combined Cipher Machine, Secure Terminal Equipment, Secret decoder ring, C-36, CD-57, 5-UCO, Rockex, Encrypted PIN Pad, KIV-7, Secure access module, Pinwheel, HC-9, JADE, BID 770, OMNI.

Excerpt: The Lorenz SZ40, SZ42A and SZ42B (SZ for Schl sselzusatz, meaning cipher attachment) were German rotor cipher machines used by their Army during World War II. They implemented a Vernam stream cipher. British cryptographers, who referred to encrypted German teleprinter traffic as Fish, dubbed the machine and its traffic Tunny. The SZ machines were in-line attachments to standard Lorenz teleprinters. The SZ40 was introduced on an experimental basis in 1940. The enhanced SZ42 machines were brought into substantial use from mid-1942 onwards for high-level communications between the German High Command in Berlin, and Army Commands throughout occupied Europe.

Wireless telegraphy (WT) rather than land-line circuits was used for this traffic. These non-Morse (NoMo) messages were picked up by Britains Y-station at Knockholt and sent to Government Code and Cypher School at Bletchley Park (BP). Some were deciphered using hand methods before the process was partially automated, first with Robinson machines and then with the Colossus computers.

The deciphered messages made an important contribution to Ultra military intelligence. Gilbert Vernam was an AT&T Bell Labs research engineer who, in 1917, invented a cipher system that used the Boolean exclusive or (XOR) function, symbolised by . This is represented by the following truth table, where 1 represents true and 0 represents false. O...



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