Cryptology ePrint Archive: BibTeX Citation of Report 2005/098

@misc{cryptoeprint:2005:098,
    author = {Yassine Lakhnech and Laurent Mazare},
    title = {Probabilistic Opacity for a Passive Adversary and its Application to Chaum's Voting Scheme },
    howpublished = {Cryptology ePrint Archive, Report 2005/098},
    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.