Cryptology ePrint Archive: BibTeX Citation of Report 2013/754

@misc{cryptoeprint:2013:754,
    author = {Omkant Pandey and Manoj Prabhakaran and Amit Sahai},
    title = {Obfuscation-based Non-black-box Simulation and Four Message Concurrent Zero Knowledge for NP},
    howpublished = {Cryptology ePrint Archive, Report 2013/754},
    year = {2013},
    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.