Cryptology ePrint Archive: BibTeX Citation of Report 2012/672

@misc{cryptoeprint:2012:672,
    author = {Itai Dinur and Orr Dunkelman and  Adi Shamir},
    title = {Collision Attacks on Up to 5 Rounds of SHA-3 Using Generalized Internal Differentials},
    howpublished = {Cryptology ePrint Archive, Report 2012/672},
    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.