CD-57

Opened CD-57

The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG, first produced in 1957.[1] 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.[2]

Sullivan (2002) shows how the CD-57 can be attacked using a hill climbing search technique.

## Contents

* 1 See also
* 2 Notes
* 3 References
* 4 External links

## See also

* M-209

## Notes

1. ↑ one website gives the production dates as "1956 and 1957" [1], another website says "first produced in 1957" "Error: no `|title=` specified when using {{Cite web}}". Archived from the original on March 17, 2006. https://web.archive.org/web/20060317161354/http://www.gemmary.com/instcat/11/p25-214-11.html. Retrieved December 9, 2005.Error:+no+`|title=`+specified when+using+{{[[Template:Cite+web|Cite+web]]}}&rft.atitle=&rft_id=https://web.archive.org/web/20060317161354/http://www.gemmary.com/instcat/11/p25-214-11.html&rfr_id=info:sid/en.wikibooks.org:Engineering:CD-57"> .
2. ↑ [2]

## 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

* Photographs and a simulator (Windows)
* Photographs of the CD-57: [3], [4], [5]
* Jerry Proc's pages: [6], [7]
* Information about the STG-61

* v
* t
* e

Cipher machines

Rotor machines|

* CCM
* Enigma
* M-125 Fialka
* Hebern
* HX-63
* KL-7
* Lacida
* M-325
* Mercury
* NEMA
* OMI
* Portex
* RED
* SG-39
* SG-41
* SIGABA
* SIGCUM
* Singlet
* Typex

Mechanical|

* Bazeries cylinder
* C-36
* C-52
* CD-57
* Cipher disk
* HC-9
* Kryha
* Jefferson disk
* M-94
* M-209
* Reihenschieber
* Scytale

Teleprinter|

* 5-UCO
* BID 770
* DUDEK
* KW-26
* KW-37
* Lorenz SZ 40/42
* Siemens and Halske T52
* SIGTOT

Secure voice|

* BID 150
* FASCINATOR
* KY-3
* KY-57
* KY-58
* KY-68
* NESTOR
* OMNI
* SCIP
* Sectéra Secure Module
* SIGSALY
* STE
* STU-II
* STU-III
* VINSON

Other|

* JADE
* KG-84
* KL-43
* KL-51
* Noreen
* Red
* Purple
* Pinwheel
* Rockex

In Computer Hardware|

* AES instruction set
* Intel SHA extensions
* IBM 4758
* IBM 4764

* v
* t
* e

Cryptography

* History of cryptography
* Cryptanalysis
* Outline of cryptography

* Symmetric-key algorithm
* Block cipher
* Stream cipher
* Public-key cryptography
* Cryptographic hash function
* Message authentication code
* Random numbers
* Steganography

* Category

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