Cryptology ePrint Archive: BibTeX Citation of Report 2014/820

@misc{cryptoeprint:2014:820,
    author = {Michael Backes and Ozgur Dagdelen and Marc Fischlin and Sebastian Gajek and Sebastian Meiser and Dominique Schröder},
    title = {Operational Signature Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2014/820},
    year = {2014},
    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.