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| 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 |
| Permission ( Reusing this file) |
Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:40, 30 December 2007 |
| 2,016 × 1,512 (1.34 MB) | Raul654 | {{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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