Cryptology ePrint Archive: BibTeX Citation of Report 2001/054

@misc{cryptoeprint:2001:054,
    author = {S.D. Galbraith and F. Hess and N.P. Smart},
    title = {Extending the GHS Weil Descent Attack},
    howpublished = {Cryptology ePrint Archive, Report 2001/054},
    year = {2001},
    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.