Cryptology ePrint Archive: BibTeX Citation of Report 2010/430

@misc{cryptoeprint:2010:430,
    author = {Vlastimil Klima and Danilo Gligoroski},
    title = {Generic Collision Attacks on Narrow-pipe Hash Functions Faster than Birthday Paradox, Applicable to MDx, SHA-1, SHA-2, and SHA-3 Narrow-pipe Candidates},
    howpublished = {Cryptology ePrint Archive, Report 2010/430},
    year = {2010},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.