Cryptology ePrint Archive: BibTeX Citation of Report 2013/421

@misc{cryptoeprint:2013:421,
    author = {Valentina Banciu and Simon Hoerder and Dan Page},
    title = {Light-weight primitive, feather-weight security? A cryptanalytic knock-out. (Preliminary results)},
    howpublished = {Cryptology ePrint Archive, Report 2013/421},
    year = {2013},
    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.