Cryptology ePrint Archive: BibTeX Citation of Report 2014/978

@misc{cryptoeprint:2014:978,
    author = {Qianqian Yang and Lei Hu and Siwei Sun and Kexin Qiao and Ling Song and Jinyong Shan and Xiaoshuang Ma},
    title = {Improved Differential Analysis of Block Cipher PRIDE},
    howpublished = {Cryptology ePrint Archive, Report 2014/978},
    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.