Cryptology ePrint Archive: BibTeX Citation of Report 2011/315

@misc{cryptoeprint:2011:315,
    author = {Zhi Hu and Patrick Longa and Maozhi Xu},
    title = {Implementing 4-Dimensional GLV Method on GLS Elliptic Curves with j-Invariant 0},
    howpublished = {Cryptology ePrint Archive, Report 2011/315},
    year = {2011},
    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.