Cryptology ePrint Archive: BibTeX Citation of Report 2014/312

@misc{cryptoeprint:2014:312,
    author = {Masayuki Abe and Jens Groth and Miyako Ohkubo and Mehdi Tibouchi},
    title = {Structure-Preserving Signatures from Type II Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2014/312},
    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.