Cryptology ePrint Archive: BibTeX Citation of Report 2011/323

@misc{cryptoeprint:2011:323,
    author = {Shusheng Liu and Libin Wang and Zheng Gong},
    title = {A New Related-Key Boomerang Distinguishing Attack of Reduced-Round Threefish-256},
    howpublished = {Cryptology ePrint Archive, Report 2011/323},
    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.