Cryptology ePrint Archive: BibTeX Citation of Report 2005/034

@misc{cryptoeprint:2005:034,
    author = {Gene Tsudik and Shouhuai Xu},
    title = {Flexible Framework for Secret Handshakes (Multi-Party Anonymous and Un-observable Authentication)},
    howpublished = {Cryptology ePrint Archive, Report 2005/034},
    year = {2005},
    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.