Portex
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/74/Portex1.jpg/320px-Portex1.jpg)
Portex on display at Bletchley Park Museum, UK.
Portex (or BID/50/1) was a British cipher machine. A rotor machine, the device used eight rotors each with a tyre ring and an insert. The machine was used mainly by the secret services from the late 1940s to the early 1950s.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Portex.jpg/220px-Portex.jpg)
Portex and rotors at the Royal Signals Museum, Blandford Camp.
See also[]
References[]
- Information card, Bletchley Park Enigma and Friends exhibit, put together by David White and John Alexander, October 2005 [1].
External links[]
Categories:
- Rotor machines
- Cryptographic hardware
- Cold War military equipment of the United Kingdom
- Cryptography stubs