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Actually, HMAC might still be secure for a hash function that is broken (with respect to the requirements of a cryptographic hash function, such as primary preimage resistance, secondary preimage resistance and collision resistance), but it must not be too badly broken. If you read the original paper, you see that the authors assume things such as the hash ...


5

The latest I know about is indeed "MD4 is Not One-Way." by Gaƫtan Leurent (PDF) FSE 2008. Some of the more interesting and more recent publications to check on are "Advanced Meet-in-the-Middle Preimage Attacks: First Results on Full Tiger, and Improved Results on MD4 and SHA-2", Jian Guo/San Ling/Christian Rechberger/Huaxiong Wang, 2010 (PDF) and the paper ...



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