Cryptology ePrint Archive: BibTeX Citation of Report 2009/625

@misc{cryptoeprint:2009:625,
    author = {Charalampos Papamanthou and Roberto Tamassia and Nikos Triandopoulos},
    title = {Cryptographic Accumulators for Authenticated Hash Tables},
    howpublished = {Cryptology ePrint Archive, Report 2009/625},
    year = {2009},
    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.