Portex

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Portex on display at Bletchley Park Museum, UK.
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.

Portex and rotors at the Royal Signals Museum, Blandford Camp.
Portex and rotors at the Royal Signals Museum, Blandford Camp.

  • Information card, Bletchley Park Enigma and Friends exhibit, put together by David White and John Alexander, October 2005 [1].


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Cipher machines
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Rotor machines: CCM | Enigma | Fialka | Hebern | HX-63 | KL-7 | Lacida | M-325 | Mercury | NEMA | OMI | Portex | 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 | KW-26 | KW-37 | Lorenz SZ 40/42 | Siemens and Halske T52
Secure voice: KY-3 | KY-57 | KY-58 | KY-68 | OMNI | SIGSALY | STE | STU-II | STU-III | VINSON | SCIP | Sectéra Secure Module
Miscellaneous: Cryptex | JADE | KG-84 | KL-43 | Noreen | PURPLE | Pinwheel | Rockex
Cryptography
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History of cryptography | Cryptanalysis | Cryptography portal | Topics in cryptography
Symmetric-key algorithm | Block cipher | Stream cipher | Public-key cryptography | Cryptographic hash function | Message authentication code | Random numbers
Retrieved from "http://en.wikipedia.org../../../p/o/r/Portex.html"
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