Cryptology ePrint Archive: BibTeX Citation of Report 2014/448

@misc{cryptoeprint:2014:448,
    author = {Ning Wang and Xiaoyun Wang and Keting Jia and Jingyuan Zhao},
    title = {Differential Attacks on Reduced SIMON Versions with Dynamic Key-guessing Techniques},
    howpublished = {Cryptology ePrint Archive, Report 2014/448},
    year = {2014},
    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.