Cryptology ePrint Archive: BibTeX Citation of Report 2006/007

@misc{cryptoeprint:2006:007,
    author = {Lifeng Guo and Guilin Wang and Duncan S. Wong},
    title = {Further Discussions on the Security of a Nominative Signature Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2006/007},
    year = {2006},
    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.