Cryptology ePrint Archive: BibTeX Citation of Report 2008/241

@misc{cryptoeprint:2008:241,
    author = {Zbigniew Golebiewski and Krzysztof Majcher and Filip Zagorski and Marcin Zawada},
    title = {Practical Attacks on HB and HB+ Protocols},
    howpublished = {Cryptology ePrint Archive, Report 2008/241},
    year = {2008},
    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.