Cryptology ePrint Archive: BibTeX Citation of Report 2002/172

@misc{cryptoeprint:2002:172,
    author = {Louis Granboulan},
    title = {PECDSA. How to build a DL-based digital signature scheme with the best proven security},
    howpublished = {Cryptology ePrint Archive, Report 2002/172},
    year = {2002},
    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.