Cryptology ePrint Archive: BibTeX Citation of Report 2011/339

@misc{cryptoeprint:2011:339,
    author = {Thomas Ristenpart and Hovav Shacham and Thomas Shrimpton},
    title = {Careful with Composition: Limitations of Indifferentiability and Universal Composability},
    howpublished = {Cryptology ePrint Archive, Report 2011/339},
    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.