Cryptology ePrint Archive: BibTeX Citation of Report 2001/059

@misc{cryptoeprint:2001:059,
    author = {Dalit Naor and Moni Naor and Jeff Lotspiech},
    title = {Revocation and Tracing Schemes for Stateless Receivers},
    howpublished = {Cryptology ePrint Archive, Report 2001/059},
    year = {2001},
    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.