Cryptology ePrint Archive: BibTeX Citation of Report 2014/633

@misc{cryptoeprint:2014:633,
    author = {Ran Canetti and Abhishek Jain and Omer Paneth},
    title = {Client-Server Concurrent Zero Knowledge with Constant Rounds and Guaranteed Complexity},
    howpublished = {Cryptology ePrint Archive, Report 2014/633},
    year = {2014},
    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.