Portex

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.

References

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

External links

Jerry Proc's page on Portex

Cipher machines

Rotor machines:	CCM Enigma M – 125 Fialka Hebern HX-63 KL-7 Lacida M-325 Mercury NEMA OMI Portex RED 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 DUDEK KW-26 KW-37 Lorenz SZ 40/42 Siemens and Halske T52

Secure voice:	BID 150 FASCINATOR KY-3 KY-57 KY-58 KY-68 OMNI SCIP Sectéra Secure Module SIGSALY STE STU-II STU-III VINSON

Miscellaneous:	JADE KG-84 KL-43 Noreen PURPLE Pinwheel Rockex

Cryptography

History of cryptography Cryptanalysis Cryptography portal Outline of cryptography

Symmetric-key algorithm Block cipher Stream cipher Public-key cryptography Cryptographic hash function Message authentication code Random numbers Steganography

Portex

See also

References

External links