Cryptology ePrint Archive: BibTeX Citation of Report 2005/021

@misc{cryptoeprint:2005:021,
    author = {Eabhnat N\'{\i} Fhloinn and Michael Purser},
    title = {Partial Hiding in Public-Key Cryptography},
    howpublished = {Cryptology ePrint Archive, Report 2005/021},
    year = {2005},
    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.