MD5 collisions?

[Eric Rescorla]

Check out this ePrint paper, which claims to have collisions in
MD5, MD4, HAVAL, and full RIPEMD.

http://eprint.iacr.org/2004/199.pdf

The authors claim that the MD5 attack took an hour for the first
collision and 15 seconds to 5 minutes for subsequent attacks
with the same first 512 bits. 


-Ekr



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