Rockex

Short description: Cipher machine

Rockex equipment

Rockex, or Telekrypton, was an offline one-time tape Vernam cipher machine known to have been used by Britain and Canada from 1943.[1] It was developed by Canadian electrical engineer Benjamin deForest Bayly, working during the war for British Security Coordination.[2]

"Rockex" was named after the Rockefeller Center,[3] together with the tradition for naming British cipher equipment with the suffix "-ex" (e.g. Typex).

In 1944 an improved Rockex II first appeared.[3] There were also a Mark III and Mark V. After the war it was used by British consulates and embassies until 1973, although a few continued in use until the mid-1980s.[4]

After WW2 the Rockex machines and the code tapes were manufactured in great secrecy under the control of the Secret Intelligence Service (SIS), also known as MI6, at a small factory at Number 4 Chester Road, Borehamwood on the northern outskirts of London. To minimise the number of people who knew about the process, MI6's head of communications, Brigadier Sir Richard Gambier-Parry, took out a personal lease on the factory buildings and employed people through the local labour exchange as an entirely private venture ostensibly unconnected with government. The end product was then sold to the government departments who used the machines. This was not discovered by the UK Treasury until 1951 who were most concerned that no form of financial auditing had ever been exercised over the organisation. The Treasury officials were eventually convinced that the factory needed to be treated as a special case and they allowed it to continue privately but with a special arrangement for top secret auditing (Natl Archives file T220/1444)

## References

1. ↑ ROCKEX, http://jproc.ca/crypto/rockex.html
2. ↑ Vendeville, Geoffrey (May 16, 2016), "Keeper of World War secrets tells all", Toronto Star: GT2, https://www.thestar.com/news/gta/2016/05/09/keeper-of-wwii-secrets-tells-all.html
3. ↑ 3.0 3.1 Louis Kruh, British intelligence in the Americas, Cryptologia, April 2001
4. ↑ Exhibit card describing Rockex equipment in the "Enigma and Friends" exhibit at the Bletchley Park museum, September 2006

## External links

* Jerry Proc's page on Rockex
* Rockex on Crypto Museum website
* 5-UCO

## See also

* Noreen

* v
* t
* e

Cipher machines

Rotor machines|

* CCM
* Enigma
* M-125 Fialka
* Hebern
* HX-63
* KL-7
* Lacida
* M-325
* Mercury
* NEMA
* OMI
* Portex
* RED
* SG-39
* SG-41
* 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
* SIGTOT

Secure voice|

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

Other|

* JADE
* KG-84
* KL-43
* KL-51
* Noreen
* Red
* Purple
* Pinwheel
* Rockex

In Computer Hardware|

* AES instruction set
* Intel SHA extensions
* IBM 4758
* IBM 4764

* v
* t
* e

Cryptography

* History of cryptography
* Cryptanalysis
* Outline of cryptography

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

* Category

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Rockex. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Engineering:Rockex&oldid=138038"
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template