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Key algorithm ??? PC1
Thursday 13 March 2008
DES (09) - KEY ????????????
Key algorithm ??????? encryption algorithm ???????? 16 round ????????? key algorithm ????? Input ?? 64 bits ?????????? Input key 64 bits ????? password ???????????? ???????? ?????????????? ??????? ??? ?????? ????? key ?? Text ??????????? ?????? ???????? (???? Text ?? 64 bits(3 rounds) ?????? Key ?????? 64 bits(3 rounds) ??????? ?????????) ? Key algorithm ?? input 64 bits ??? permuted choice 1 (PC1) ?? permutation ??????? 56 bits ???? ?????????? Key algorithm ??? PC1 ??????? ???????? ?????????????????
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