Cryptology ePrint Archive: BibTeX Citation of Report 2013/840

@misc{cryptoeprint:2013:840,
    author = {Seung Geol Choi and Jonathan Katz and Dominique Schröder and Arkady Yerukhimovich and Hong Sheng Zhou},
    title = {(Efficient) Universally Composable Oblivious Transfer Using a Minimal Number of Stateless Tokens},
    howpublished = {Cryptology ePrint Archive, Report 2013/840},
    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.