Cryptology ePrint Archive: BibTeX Citation of Report 2014/973

@misc{cryptoeprint:2014:973,
    author = {Danping Shi and Lei Hu and Siwei Sun and Ling Song and Kexin Qiao and Xiaoshuang Ma},
    title = {Improved Linear (hull) Cryptanalysis of Round-reduced Versions of SIMON},
    howpublished = {Cryptology ePrint Archive, Report 2014/973},
    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.