HC-9
From Infogalactic: the planetary knowledge core
File:HC-9.jpg
An HC-9 on display at Bletchley Park.
The HC-9 was a mechanical cipher device manufactured by Swedish company AB Transvertex. The HC-9 was designed after World War II and likely remained in use up to the 1970s. The machine was used for low-level communications.
Operation
The HC-9 made use of punched cards instead of the pin-wheel mechanisms of other machines (for example, the Hagelin M-209). Lua error in package.lua at line 80: module 'strict' not found.
External links
- Photograph of an HC-9
- Another HC-9 photograph with a description
- A description of the machine and a simulator in QBASIC
- Discussion of the machine's operation
References
- Cipher A. Deavours and Louis Kruh, The Swedish HC-9 Ciphering Machine, Cryptologia, Vol. 13(3), July 1989, pp. 251–265
- Cipher A. Deavours and Louis Kruh, The Swedish HC-9 Ciphering Machine Challenge, Cryptologia, Vol. 14(2), April 1990, pp. 139–144
- H. P. Greenough, Cryptanalysis of the Swedish HC-9: A Known-Plaintext Approach, Cryptologia, 1997, 21(4), pp353–367.
