File:Purple code machine 3.jpg

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Fragment of a Purple code machine from World War II
Description Side view of a fragment of a w:Type B Cipher Machine, known to the U.S. as Purple, on display at the United States National Security Agency's National Cryptologic Museum located in Ft. Meade, Maryland. It is the largest fragment known to have survived. The fragment contains three 7x25 stepping switches and implemented one stage of the "twenties" cipher. A similar mechanical design, with four 7x25 stepping switches, is seen in the JADE cipher File:JADE, Japanese Type-97 cipher machine captured in Saipan in June 1944 - National Cryptologic Museum - DSC07850.JPG
Date
Source Own work
Author Mark Pellegrini
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current03:40, 30 December 2007Thumbnail for version as of 03:40, 30 December 20072,016 × 1,512 (1.34 MB)Raul654 (talk | contribs){{Information |Description=Pictures taken by myself at the US National Cryptologic Museum. |Source=Self-made |Date=December 28, 2007 |Author=Mark Pellegrini |Permission=Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |other_ve

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