Cryptanalysis of Double-Block-Length Hash Modes MDC-4 and MJH

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概要

• 論文の詳細を見る

• We give some attacks on the DBL hash modes MDC-4 and MJH. Our preimage attack on the MDC-4 hash function requires the time complexity O(23n/2) for the block length n of the underlying block cipher, which significantly improves the previous results. Our collision attack on the MJH hash function has a time complexity less than 2124 for n=128. Our preimage attack on the the MJH compression function finds a preimage with the time complexity of 2n. It is converted to a preimage attack on the hash function with the time complexity of O(23n/2). As far as we know, any cryptanalytic result for MJH has not been published before. Our results are helpful for understanding the security of the hash modes together with their security proofs.

• The Institute of Electronics, Information and Communication Engineersの論文

著者

• KWON Daesung

  Attached Institute of ETRI

• HONG Deukjo

  Attached Institute of ETRI

関連論文

• Cryptanalysis of Double-Block-Length Hash Modes MDC-4 and MJH

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