Image:Sigaba2.jpg

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Sigaba2.jpg‎ (24KB, MIME type: image/jpeg)

SIGABA — scanned from Codes and Ciphers: An A to Z of Covert Communication from the Clay Tablet to the Microdot, Fred B. Wrixon, Prentice Hall, 1992 [1]; image credits labelled courtesy of NSA.

Public Domain

This article or image contains materials that originally came from a National Security Agency (NSA) website or publication. It is believed that this information is not classified, and hence as a work of the United States Government is in the public domain. See the privacy and security information.

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  • (del) (cur) 08:36, 12 October 2004 . . Matt Crypto (Talk | contribs) . . 280×329 (24,378 bytes) (SIGABA — scanned from Codes and Ciphers: An A to Z of Covert Communication from the Clay Tablet to the Microdot, Fred B. Wrixon, Prentice Hall, 1992 [http://www.organix.tv/external/raw/Cryptome031800/nsa-rowlett.htm]; image credits labelled cour)

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