Cryptology ePrint Archive: BibTeX Citation of Report 2007/073

@misc{cryptoeprint:2007:073,
    author = {Dan Boneh and Eyal Kushilevitz and Rafail Ostrovsky and William E. Skeith III},
    title = {Public Key Encryption that Allows PIR Queries},
    howpublished = {Cryptology ePrint Archive, Report 2007/073},
    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.