@misc{cryptoeprint:2007:136,
    author = {Jingwei Liu and Rong Sun and Weidong Kou and Xinmei Wang},
    title = {Fair Exchange Signature Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2007/136},
    year = {2007},
    url = {http://eprint.iacr.org/2007/136},
}