Cryptology ePrint Archive: BibTeX Citation of Report 2015/237

@misc{cryptoeprint:2015:237,
    author = {Wouter Lueks and Gergely Alpár and Jaap-Henk Hoepman and Pim Vullers},
    title = {Fast Revocation of Attribute-Based Credentials for Both Users and Verifiers},
    howpublished = {Cryptology ePrint Archive, Report 2015/237},
    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.