Cryptology ePrint Archive: BibTeX Citation of Report 2011/017

@misc{cryptoeprint:2011:017,
    author = {Jiazhe Chen and Keting Jia and Hongbo Yu and Xiaoyun Wang},
    title = {New Impossible Differential Attacks of Reduced-Round Camellia-192 and Camellia-256},
    howpublished = {Cryptology ePrint Archive, Report 2011/017},
    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.