Cryptology ePrint Archive: BibTeX Citation of Report 2001/022

@misc{cryptoeprint:2001:022,
    author = {Klaus Kursawe and Victor Shoup},
    title = {Optimistic Asynchronous Atomic Broadcast},
    howpublished = {Cryptology ePrint Archive, Report 2001/022},
    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.