Cryptology ePrint Archive: BibTeX Citation of Report 2015/404

@misc{cryptoeprint:2015:404,
    author = {Esha Ghosh and Olga Ohrimenko and Dimitrios Papadopoulos and Roberto Tamassia and Nikos Triandopoulos},
    title = {Zero-Knowledge Accumulators and Set Operations},
    howpublished = {Cryptology ePrint Archive, Report 2015/404},
    year = {2015},
    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.