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HAVAL
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==Security== Research has uncovered weaknesses which make further use of HAVAL (at least the variant with 128 bits and 3 passes with 2<sup>6</sup> operations) questionable. On 17 August 2004, [[hash collision|collision]]s for HAVAL (128 bits, 3 passes) were announced by [[Xiaoyun Wang]], Dengguo Feng, [[Xuejia Lai]], and Hongbo Yu.<ref>[http://eprint.iacr.org/2004/199.pdf Collisions for Hash Functions MD4, MD5, HAVAL-128 and RIPEMD]</ref>
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