Cryptology ePrint Archive: BibTeX Citation of Report 2013/516

@misc{cryptoeprint:2013:516,
    author = {Melissa Chase and Sarah Meiklejohn and Gregory M. Zaverucha},
    title = {Algebraic MACs and Keyed-Verification Anonymous Credentials},
    howpublished = {Cryptology ePrint Archive, Report 2013/516},
    year = {2013},
    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.