Cryptology ePrint Archive: BibTeX Citation of Report 2013/719

@misc{cryptoeprint:2013:719,
    author = {Sandro Coretti and Ueli Maurer and Björn Tackmann},
    title = {Constructing Confidential Channels from Authenticated Channels---Public-Key Encryption Revisited},
    howpublished = {Cryptology ePrint Archive, Report 2013/719},
    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.