Cryptology ePrint Archive: BibTeX Citation of Report 2007/331

@misc{cryptoeprint:2007:331,
    author = {Ivan Damgaard and Jesper Buus Nielsen and Daniel Wichs },
    title = {Isolated Proofs of Knowledge and Isolated Zero Knowledge},
    howpublished = {Cryptology ePrint Archive, Report 2007/331},
    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.