Cryptology ePrint Archive: BibTeX Citation of Report 2004/312

@misc{cryptoeprint:2004:312,
    author = {David Jao and Stephen D. Miller and Ramarathnam Venkatesan},
    title = {Ramanujan Graphs and the Random Reducibility of Discrete Log on Isogenous Elliptic Curves},
    howpublished = {Cryptology ePrint Archive, Report 2004/312},
    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.