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MDC-2 : ウィキペディア英語版
MDC-2
In cryptography, MDC-2 (Modification Detection Code 2, sometimes called Meyer-Schilling) is a cryptographic hash function. MDC-2 is a hash function based on a block cipher with a proof of security in the ideal-cipher model. The length of the output hash depends on the underlying block cipher used.
== Algorithm ==
For a given message M to hash and a given block cipher encryption function E, the MDC-2 algorithm proceeds as follows. Let n be the block length, A_1, B_1 two different constants of size n. If M = M_1||..||M_m where each M_i has size n, then the hash V_m||W_m of the message is given by:
*for i = 1 to m:
*
*V_i = M_i \oplus E(M_i,A_i)
*
*W_i = M_i \oplus E(M_i,B_i)
*
*V_i^L || V_i^R = V_i
*
*W_i^L || W_i^R = W_i
*
*A_ = V_i^R||W_i^L
*
*B_ = W_i^R||V_i^L
*return A_||B_

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「MDC-2」の詳細全文を読む



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