JADE (cipher machine)

Short description: Japanese World War II cipher machine

A captured JADE machine on display in the National Cryptologic Museum. Keyboard of Jade machine

JADE was the codename given by US codebreakers to a Japanese World War II cipher machine. The Imperial Japanese Navy used the machine for communications from late 1942 until 1944. JADE was similar to another cipher machine, CORAL, with the main difference that JADE was used to encipher messages in katakana using an alphabet of 50 symbols.[1]

According to the NSA, "apparently, the JADE machine did not stand up to heavy usage in the field, and, after an initial high volume of traffic, it was used much less." While CORAL traffic was also low, an important user was a Japanese representative, Vice Admiral Abe, to an Axis war-planning council whose reports coded in CORAL were intercepted and proved vital to Allied planning in the European theater.[1]

## Contents

* 1 See also
* 2 External links
* 3 References
* 3.1 References from Japanese Wikipedia

## See also

* Purple
* RED

## External links

* TENTATIVE LIST OF ENIGMA AND OTHER MACHINE USAGES 30 March 1945 -- JADE is covered

## References

1. ↑ 1.0 1.1 https://www.nsa.gov/about/cryptologic-heritage/center-cryptologic-history/pearl-harbor-review/early-japanese/ Early Japanese Systems NSA Center for Cryptologic History

### References from Japanese Wikipedia

* Separate Mathematical Sciences Cryptography, Science Inc., 1982, “Deciphering Japanese Machine Cryptography in the United States and Its Theoretical Considerations”, Masataka Kato
* Machine Cryptography and Modern Cryptanalysis, Cipher A. Deavours, Louis Kruh, ARTECH HOUSE, 1985
* BIG MACHINES, Stephen J. Kelley, Aegean Park Press, 2001
* "Naval Operational Communication History", Guard Corps School of Art, Showa 28
* "Shin Takayama Tore 128," Miyauchi Kanto, Rokuko Publishing, 1975
* History of Kitajima Island Naval Forces, "Cryptographic Printing Machine and Thin-Bar Type Replacement Board", Kakuji Ishigami, 1985
* "A review of correspondence warfare and correspondence warfare measures", Yoshio Nakano, 1955

* v
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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

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Cryptography

* History of cryptography
* Cryptanalysis
* Outline of cryptography

* Symmetric-key algorithm
* Block cipher
* Stream cipher
* Public-key cryptography
* Cryptographic hash function
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* Steganography

* Category

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