Cryptology ePrint Archive: BibTeX Citation of Report 2008/235

@misc{cryptoeprint:2008:235,
    author = {Rafail Ostrovsky and Giuseppe Persiano and Ivan Visconti},
    title = {Constant-Round Concurrent Non-Malleable Commitments and Decommitments},
    howpublished = {Cryptology ePrint Archive, Report 2008/235},
    year = {2008},
    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.