Cryptology ePrint Archive: BibTeX Citation of Report 2013/148

@misc{cryptoeprint:2013:148,
    author = {Alexander Rostovtsev},
    title = {AES-like ciphers: are special S-boxes better then random ones? (Virtual isomorphisms again)},
    howpublished = {Cryptology ePrint Archive, Report 2013/148},
    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.