Cryptology ePrint Archive: BibTeX Citation of Report 2004/076

@misc{cryptoeprint:2004:076,
    author = {Aggelos Kiayias and Moti Yung},
    title = {Group Signatures: Provable Security, Efficient Constructions and Anonymity from Trapdoor-Holders},
    howpublished = {Cryptology ePrint Archive, Report 2004/076},
    year = {2004},
    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.