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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.
[edit] 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).
[edit] 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
[edit] See also
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