Cryptology ePrint Archive: BibTeX Citation of Report 2005/227

@misc{cryptoeprint:2005:227,
    author = {K. Maneva-Jakimoska and G. Jakimoski and M. Burmester},
    title = {Threshold Ring Signatures Efficient for Large Sets of Signers},
    howpublished = {Cryptology ePrint Archive, Report 2005/227},
    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.