MULTI2

MULTI2

Infobox block cipher
name = MULTI2
designers = Hitachi
publish date = 1988
derived from =
derived to =
key size = 64 bits
block size = 64 bits
structure = Feistel network
rounds = Variable
cryptanalysis =

MULTI2 is a block cipher, developed by Hitachi in 1988. Designed for general-purpose cryptography, its current use is encryption of high-definition television broadcasts in Japan.

Cipher details

MULTI2 is a symmetric key algorithm with variable number of rounds. It has a block size of 64 bits, and a key size of 64 bits. A 256-bit implementation-dependent substitution box constant is used during key schedule. Scramble and descramble is done by repeating four basic functions (involutions).

History

* 1988 MULTI2 patent applied by Hitachi, Ltd on April 28
* 1989 Algorithm announced to DPS-SIG Information Processing Society of Japan
* 1991 Patent number 4942492 granted for MULTI2 algorithm in United States
* 1994 Algorithm registered with ISO/IEC 9979 and assigned registration number 9
* 1995 MULTI2 adopted as standard cipher for CS-Digital broadcasting in Japan
* 1998 Japanese Patent number 2760799 granted for MULTI2 algorithm

ee also

* Integrated Services Digital Broadcasting

External links

* [http://www.isg.rhul.ac.uk/~cjm/ISO-register/0009.pdf ALGORITHM REGISTER ENTRY, registered in 1994]


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