Cryptology ePrint Archive: BibTeX Citation of Report 2012/421

@misc{cryptoeprint:2012:421,
    author = {Ekawat Homsirikamol and Pawel Morawiecki and Marcin Rogawski and Marian Srebrny},
    title = {Security margin evaluation of SHA-3 contest finalists through SAT-based attacks},
    howpublished = {Cryptology ePrint Archive, Report 2012/421},
    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.