Cryptology ePrint Archive: BibTeX Citation of Report 2007/432

@misc{cryptoeprint:2007:432,
    author = {Craig Gentry and Chris Peikert and Vinod Vaikuntanathan},
    title = {Trapdoors for Hard Lattices and New Cryptographic Constructions},
    howpublished = {Cryptology ePrint Archive, Report 2007/432},
    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.