Cryptology ePrint Archive: BibTeX Citation of Report 2011/679

@misc{cryptoeprint:2011:679,
    author = {Junaid Jameel Ahmad and Shujun Li and Ahmad-Reza Sadeghi and Thomas Schneider},
    title = {CTL: A Platform-Independent Crypto Tools Library Based on Dataflow Programming Paradigm},
    howpublished = {Cryptology ePrint Archive, Report 2011/679},
    year = {2011},
    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.