Cryptology ePrint Archive: BibTeX Citation of Report 2013/511

@misc{cryptoeprint:2013:511,
    author = {Siavash Ahmadi, Zahra Ahmadian, Javad Mohajeri, and Mohammad Reza Aref},
    title = {Low Data Complexity Biclique Cryptanalysis of Block Ciphers with Application to Piccolo and HIGHT},
    howpublished = {Cryptology ePrint Archive, Report 2013/511},
    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.