@misc{cryptoeprint:2011:554,
    author = {Yu-Chi Chen and Gwoboa Horng},
    title = {On the security models for certificateless signature schemes  achieving level 3 security},
    howpublished = {Cryptology ePrint Archive, Report 2011/554},
    year = {2011},
    url = {http://eprint.iacr.org/2011/554},
}