Stencil Subtractor

The Stencil Subtractor frame was a ciphered text recyphering tool that was invented by British Army Intelligence Officer and cryptographer John Tiltman [1] and was ready for trial by April 1941 but was not adopted officially by the British Forces until March 1942, and not brought into service until June 1943. [2] It replaced the venerable and vulnerable Subtractor tables which had been previously used to encipher British military and civilian codes.

References

  1. ↑ Christopher H. Sterling (2008). Military Communications: From Ancient Times to the 21st Century. ABC-CLIO. p. 453. ISBN 978-1-85109-732-6.
  2. ↑ John Ferris (7 May 2007). Intelligence and Strategy: Selected Essays. Routledge. p. 159. ISBN 978-1-134-23335-9.
This article is issued from Wikipedia - version of the 10/16/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.