Cryptology ePrint Archive: BibTeX Citation of Report 2012/147

@misc{cryptoeprint:2012:147,
    author = {Elena Andreeva and Andrey Bogdanov and Bart Mennink and Bart Preneel and Christian Rechberger},
    title = {On Security Arguments of the Second Round SHA-3 Candidates},
    howpublished = {Cryptology ePrint Archive, Report 2012/147},
    year = {2012},
    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.