Cryptology ePrint Archive: BibTeX Citation of Report 2015/014

@misc{cryptoeprint:2015:014,
    author = {San Ling and Khoa Nguyen and Huaxiong Wang},
    title = {Group Signatures from Lattices: Simpler, Tighter, Shorter, Ring-based},
    howpublished = {Cryptology ePrint Archive, Report 2015/014},
    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.