Cryptology ePrint Archive: BibTeX Citation of Report 2013/061

@misc{cryptoeprint:2013:061,
    author = {Elena Andreeva and Andrey Bogdanov and Yevgeniy Dodis and Bart Mennink and John P. Steinberger},
    title = {On the Indifferentiability of Key-Alternating Ciphers},
    howpublished = {Cryptology ePrint Archive, Report 2013/061},
    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.