Cryptology ePrint Archive: BibTeX Citation of Report 2013/326

@misc{cryptoeprint:2013:326,
    author = {Mihir Bellare and Sarah Meiklejohn and Susan Thomson},
    title = {Key-Versatile Signatures and Applications: RKA, KDM and Joint Enc/Sig},
    howpublished = {Cryptology ePrint Archive, Report 2013/326},
    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.