Cryptology ePrint Archive: BibTeX Citation of Report 1998/004

@misc{cryptoeprint:1998:004,
    author = {Giovanni Di-Crescenzo and Yuval Ishai and Rafail Ostrovsky},
    title = {Universal Service Providers for Database Private Information Retrieval},
    howpublished = {Cryptology ePrint Archive, Report 1998/004},
    year = {1998},
    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.