CD-57
Encyclopedia
The CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
, first produced in 1957.
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
, first produced in 1957.
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" http://www.gemmary.com/instcat/11/p25-214-11.html
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" http://www.gemmary.com/instcat/11/p25-214-11.html
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" http://www.gemmary.com/instcat/11/p25-214-11.html . 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
Sullivan (2002) shows how the CD-57 can be attacked using a hill climbing
search technique.
Crypto AG
Crypto AG is a Swiss company specialising in communications and information security. With headquarters in steinhausen, the company is a long-established manufacturer of encryption machines and a wide variety of cipher devices...
, first produced in 1957.
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
Crypto AG
Crypto AG is a Swiss company specialising in communications and information security. With headquarters in steinhausen, the company is a long-established manufacturer of encryption machines and a wide variety of cipher devices...
, first produced in 1957.
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
Crypto AG
Crypto AG is a Swiss company specialising in communications and information security. With headquarters in steinhausen, the company is a long-established manufacturer of encryption machines and a wide variety of cipher devices...
, 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" http://www.gemmary.com/instcat/11/p25-214-11.html
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
Crypto AG
Crypto AG is a Swiss company specialising in communications and information security. With headquarters in steinhausen, the company is a long-established manufacturer of encryption machines and a wide variety of cipher devices...
, 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" http://www.gemmary.com/instcat/11/p25-214-11.html
The (Hagelin) CD-57 was a portable, mechanical cipher machine manufactured by Crypto AG
Crypto AG
Crypto AG is a Swiss company specialising in communications and information security. With headquarters in steinhausen, the company is a long-established manufacturer of encryption machines and a wide variety of cipher devices...
, 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" http://www.gemmary.com/instcat/11/p25-214-11.html . It was derived from the earlier CD-55, and was designed to be compatible with the larger C-52
C-52 (cipher machine)
The C-52 and CX-52 were cipher machines manufactured by Crypto AG starting 1951/1952. These pin-and-lug type cipher machines were advanced successors of the C-38/M-209. The machine measures 8 1/2in × 5 3/8in × 4 3/8in...
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
One-time pad
In cryptography, the one-time pad is a type of encryption, which has been proven to be impossible to crack if used correctly. Each bit or character from the plaintext is encrypted by a modular addition with a bit or character from a secret random key of the same length as the plaintext, resulting...
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
Sullivan (2002) shows how the CD-57 can be attacked using a hill climbing
Hill climbing
In computer science, hill climbing is a mathematical optimization technique which belongs to the family of local search. It is an iterative algorithm that starts with an arbitrary solution to a problem, then attempts to find a better solution by incrementally changing a single element of the solution...
search technique.
External links
- Photographs and a simulator (Windows)
- Photographs of the CD-57: http://www2.kulturprozent.ch/digitalbrainstorming/data/events/stuerzinger/image01.jpg, http://www2.kulturprozent.ch/digitalbrainstorming/data/events/stuerzinger/image02.jpg, 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
- Information about the STG-61
