MULTI2
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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.
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. x = ROL(x, y) ^ x Where ROL means rotate left by y bits, is not bijective for any value of y. There are similar problems with the Pi2 and Pi4 functions but they are seemingly harder to exploit because the rotation value is smaller. There are other observations too, for example x = ROL(x, 1) - x Found in Pi3, is an identity function for 50% of the values of x (where the most significant byte is zero). This also means it is possible to have weak keys where instead of forcing single byte differences in the key, they are in the plaintext into Pi3 produces a zero-delta output and possibly leading to a 1R differential. ==See also== Integrated Services Digital Broadcasting ==External links== ALGORITHM REGISTER ENTRY, registered in 1994
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