CD-57
{{Short description|Mechanical cipher machine}}
{{More footnotes|date=October 2008}}
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG, first produced in 1957.one website gives the production dates as "1956 and 1957" [http://www.jproc.ca/crypto/cd57.html], another website says "first produced in 1957" {{cite web|url=http://www.gemmary.com/instcat/11/p25-214-11.html |accessdate=December 9, 2005 |url-status=dead |archiveurl=https://web.archive.org/web/20060317161354/http://www.gemmary.com/instcat/11/p25-214-11.html |archivedate=March 17, 2006 |title=Cd-57 Handheld 6-Rotor Cryptographic Machine by Crypto Ag }} . It was derived from the earlier CD-55, and was designed to be compatible with the larger C-52 machines. Compact, the CD-57 measured merely 5 1/8in × 3 1/8in × 1 1/2in (13 × 8 × 3.8 cm) and weighed 1.5 pounds (680 gr). The CD-57 used six wheels.
A variant is the CD-57(RT), a similar device using a one-time pad system rather than rotating wheels. The STG-61 was a licensed copy of the CD-57 by Hell.[http://www.gemmary.com/instcat/11/p23-203-11.html] {{webarchive |url=https://web.archive.org/web/20041229131958/http://www.gemmary.com/instcat/11/p23-203-11.html |date=December 29, 2004 }}
Sullivan (2002) shows how the CD-57 can be attacked using a hill climbing search technique.
See also
Notes
References
- Wayne G. Baker, Solving a Hagelin, Type CD-57, Cipher, Cryptologia, 2(1), January 1978, pp1–8.
- Louis Kruh, Cipher Equipment: Hagelin Pocket Cryptographer, Type CD-57, Cryptologia, Volume 1, 1977, pp255–260.
- Geoff Sullivan, Cryptanalysis of Hagelin machine pin wheels, Cryptologia, 26(4), pp257–273, October 2002.
External links
{{Commons category|CD-57}}
- [https://web.archive.org/web/20081012122703/http://cryptocellar.web.cern.ch/cryptocellar/simula/cd57/index.html Photographs and a simulator (Windows)]
- Photographs of the CD-57: [https://web.archive.org/web/20071008092722/http://www2.kulturprozent.ch/digitalbrainstorming/data/events/stuerzinger/image01.jpg], [https://web.archive.org/web/20071008092838/http://www2.kulturprozent.ch/digitalbrainstorming/data/events/stuerzinger/image02.jpg], [https://web.archive.org/web/20060602220446/http://www2.kulturprozent.ch/digitalbrainstorming/data/events/stuerzinger/image03.jpg]
- Jerry Proc's pages: [http://www.jproc.ca/crypto/cd57.html], [http://www.jproc.ca/crypto/cd55.html]
- [https://web.archive.org/web/20060317161412/http://www.gemmary.com/instcat/11/p25-215-11.html Information about the STG-61]
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