MULTI2

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**MULTI2**
Designer(s):	Hitachi
First published:	1988
Key size(s):	64 bits
Block size(s):	64 bits
Structure:	Feistel network
Rounds:	Variable

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.

1 Cipher details
2 History
3 See Also
4 External Links

[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
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 Patent number 2760799 granted for MULTI2 algorithm

[edit] See Also

Integrated Services Digital Broadcasting

[edit] External Links

ALGORITHM REGISTER ENTRY, ISO9979/0009, registered on 1994-11-14

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