Cryptology ePrint Archive: BibTeX Citation of Report 2006/228

@misc{cryptoeprint:2006:228,
    author = {Mihir Bellare and Amit Sahai},
    title = {Non-Malleable Encryption: Equivalence between Two Notions, and an Indistinguishability-based Characterization},
    howpublished = {Cryptology ePrint Archive, Report 2006/228},
    year = {2006},
    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.