Cryptology ePrint Archive: BibTeX Citation of Report 2012/569

@misc{cryptoeprint:2012:569,
    author = {San Ling and Khoa Nguyen and Damien Stehle and Huaxiong Wang},
    title = {Improved Zero-knowledge Proofs of Knowledge for the ISIS Problem, and Applications},
    howpublished = {Cryptology ePrint Archive, Report 2012/569},
    year = {2012},
    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.