Cryptology ePrint Archive: BibTeX Citation of Report 2013/547

@misc{cryptoeprint:2013:547,
    author = {Siwei Sun and Lei Hu and Ling Song and Yonghong Xie and Peng Wang},
    title = {Automatic Security Evaluation of Block Ciphers with S-bP Structures against Related-key Differential Attacks},
    howpublished = {Cryptology ePrint Archive, Report 2013/547},
    year = {2013},
    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.