Cryptology ePrint Archive: BibTeX Citation of Report 2007/467

@misc{cryptoeprint:2007:467,
    author = {Andr\'e Chailloux and Dragos Florin Ciocan and Iordanis Kerenidis and Salil Vadhan},
    title = {Interactive and Noninteractive Zero Knowledge are Equivalent in the Help Model},
    howpublished = {Cryptology ePrint Archive, Report 2007/467},
    year = {2007},
    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.