Cryptology ePrint Archive: BibTeX Citation of Report 2015/843

@misc{cryptoeprint:2015:843,
    author = {David Derler and Daniel Slamanig},
    title = {Rethinking Privacy for Extended Sanitizable Signatures and a Black-Box Construction of Strongly Private Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2015/843},
    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.