@misc{cryptoeprint:2009:421,
    author = {Tsz Hon Yuen and Willy Susilo and Yi Mu},
    title = {How to Construct Identity-Based Signatures without the Key Escrow Problem},
    howpublished = {Cryptology ePrint Archive, Report 2009/421},
    year = {2009},
    url = {http://eprint.iacr.org/2009/421},
}