Cryptology ePrint Archive: BibTeX Citation of Report 2002/105

@misc{cryptoeprint:2002:105,
    author = {Jan Denef and Frederik Vercauteren},
    title = {An Extension of Kedlaya's Algorithm to Hyperelliptic Curves in Characteristic 2},
    howpublished = {Cryptology ePrint Archive, Report 2002/105},
    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.