Cryptology ePrint Archive: BibTeX Citation of Report 2011/630

@misc{cryptoeprint:2011:630,
    author = {Dustin Moody and Souradyuti Paul and Daniel Smith-Tone},
    title = {Indifferentiability Security of the Fast Wide Pipe Hash: Breaking the Birthday Barrier},
    howpublished = {Cryptology ePrint Archive, Report 2011/630},
    year = {2011},
    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.