Cryptology ePrint Archive: BibTeX Citation of Report 2013/445

@misc{cryptoeprint:2013:445,
    author = {Ryad Benadjila and Jian Guo and Victor Lomné and Thomas Peyrin},
    title = {Implementing Lightweight Block Ciphers on x86 Architectures},
    howpublished = {Cryptology ePrint Archive, Report 2013/445},
    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.