@misc{cryptoeprint:2003:055,
    author = {Xiaofeng Chen and Fangguo Zhang and Yumin Wang},
    title = {A New Approach to Prevent Blackmailing in E-Cash},
    howpublished = {Cryptology ePrint Archive, Report 2003/055},
    year = {2003},
    url = {http://eprint.iacr.org/2003/055},
}