Fish (cryptography)

From Wikipedia, the free encyclopedia

You have new messages (last change).
For the (Fibonacci Shrinking) stream cipher published in 1993, see FISH (cipher).

Fish (sometimes FISH) was the Allied codename for any of several German teleprinter stream ciphers used during World War II. While a large number of links were monitored, at least three different encryption systems were distinguished:

  • Tunny — the Lorenz SZ 40 and SZ 42 from Lorenz Electric. Tunny traffic was read successfully at Bletchley Park, using the famous Colossus computer.
  • Sturgeon — the Siemens and Halske T52 from Siemens. Although Bletchley Park managed to work out Sturgeon, they never read much of its traffic.
  • Thrasher — probably the Siemens T43 one-time tape machine. The T43 was used only on a few circuits, in the later stages of the war.

See also: Ultra

[edit] References

  • Wolfgang W. Mache, Geheimschreiber (Cryptology: Yesterday, Today and Tomorrow, Artech House, Norwood, 1987)
  • Cipher A. Deavours and Louis Kruh, Mechanics of the German Telecipher Machine (also reprinted in Cryptology: Yesterday, Today and Tomorrow)
  • Wolfgang W. Mache, The Siemens Cipher Teletype in the History of Telecommunications (reprinted in Selections from Cryptologia: History, People, and Technology, Artech House, Norwood, 1998)
Retrieved from "http://en.wikipedia.org../../../f/i/s/Fish_%28cryptography%29.html"
In other languages