3.Chanjoo Chung gave an improved Domingo?s scheme in PKC2000. But there is a security weakness in his registration protocol, namely, any impersonator can successfully personate an honest buyer with the probability ?1/2?. In our paper, a more efficient anonymous digital fingerprinting scheme than the scheme by Domingo is given. This scheme requires only 1 exponential operation for identifying redistributors, which improves the whole scheme?s efficiency.
ChanjooChung给出了改进Domingo方案,但在其注册协议中存在一个安全漏洞,即任意的假冒者能成功地冒充一名诚实用户的概率为1/2.针对这一情况给出了一种较Domingo方案更高效的匿名数字指纹方案,使得在鉴别盗版者时仅需1次指数运算,大大地提高了整个方案效率,且安全性与Domingo方案相当,同时也解决了ChanjooChung方案的安全漏洞.
