Cryptology ePrint Archive: BibTeX Citation of Report 2011/617

@misc{cryptoeprint:2011:617,
    author = {Joseph A. Akinyele and Matthew D. Green and Avi D. Rubin},
    title = {Charm: A framework for Rapidly Prototyping Cryptosystems},
    howpublished = {Cryptology ePrint Archive, Report 2011/617},
    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.