Cryptology ePrint Archive: BibTeX Citation of Report 2013/207

@misc{cryptoeprint:2013:207,
    author = {Yanjiang Yang and Xuhua Ding and Haibing Lu and Jian Weng},
    title = {Self-blindable Credential: Towards LightWeight Anonymous Entity Authentication},
    howpublished = {Cryptology ePrint Archive, Report 2013/207},
    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.