@misc{cryptoeprint:2008:305,
    author = {Xun Sun and Jian-hua Li and Gong-liang Chen and Shu-tang Yang},
    title = {Identity-Based Directed Signature Scheme from Bilinear Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2008/305},
    year = {2008},
    url = {http://eprint.iacr.org/2008/305},
}