Cryptology ePrint Archive: BibTeX Citation of Report 2009/360

@misc{cryptoeprint:2009:360,
    author = {Ruilin Li and Bing Sun and Chao Li and Longjiang Qu},
    title = {Cryptanalysis of a Generalized Unbalanced Feistel Network Structure},
    howpublished = {Cryptology ePrint Archive, Report 2009/360},
    year = {2009},
    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.