Cryptology ePrint Archive: BibTeX Citation of Report 2004/107

@misc{cryptoeprint:2004:107,
    author = {Bertrand BYRAMJEE and Sylvain DUQUESNE},
    title = {Classification of genus 2 curves over $\mathbb{F}_{2^n}$ and optimization of their arithmetic},
    howpublished = {Cryptology ePrint Archive, Report 2004/107},
    year = {2004},
    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.