HC-9: Difference between revisions
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{{Short description|Mechanical cipher device}} | |||
[[Image:HC-9.jpg|right|320px|thumbnail|An HC-9 on display at [[Bletchley Park]].]] | [[Image:HC-9.jpg|right|320px|thumbnail|An HC-9 on display at [[Bletchley Park]].]] | ||
The HC-9 was a mechanical cipher device manufactured by the Swedish company AB Transvertex. It was designed in the early 1950s for the Swedish Armed Forces and in use from 1963 to 1995 as Krypteringsapparat 301 (Kryapp 301). This machine was used for low-level communications such as platoon, company, up to battalion levels and in regimental and brigade staffs.The machine dimensions are 18 x 15 x 7 cm. | The HC-9 was a mechanical cipher device manufactured by the Swedish company AB Transvertex. It was designed in the early 1950s for the Swedish Armed Forces and in use from 1963 to 1995 as Krypteringsapparat 301 (Kryapp 301). This machine was used for low-level communications such as platoon, company, up to battalion levels and in regimental and brigade staffs.The machine dimensions are 18 x 15 x 7 cm. | ||
Latest revision as of 10:04, 24 August 2025
The HC-9 was a mechanical cipher device manufactured by the Swedish company AB Transvertex. It was designed in the early 1950s for the Swedish Armed Forces and in use from 1963 to 1995 as Krypteringsapparat 301 (Kryapp 301). This machine was used for low-level communications such as platoon, company, up to battalion levels and in regimental and brigade staffs.The machine dimensions are 18 x 15 x 7 cm.
Operation
The HC-9 made use of punched cards instead of the pin-wheel mechanisms of other machines (for example, the Hagelin M-209). Script error: No such module "Unsubst".
External links
- Photograph of an HC-9
- Another HC-9 photograph with a description
- A description of the machine and a simulator in QBASICTemplate:Category handler[<span title="Script error: No such module "string".">usurped]Script error: No such module "Check for unknown parameters".
- Discussion of the machine's operation
- How it worked with photos and manual.
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.
Script error: No such module "Navbox".