Cryptology ePrint Archive: BibTeX Citation of Report 2007/351

@misc{cryptoeprint:2007:351,
    author = {Iftach Haitner and Jonathan J. Hoch and Gil Segev},
    title = {A Linear Lower Bound on the Communication Complexity of Single-Server Private Information Retrieval},
    howpublished = {Cryptology ePrint Archive, Report 2007/351},
    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.