现在的数字版权管理(DRM)系统注重的只是防止数字内容被非法复制以及保障内容服务商的利益,并没有充分考虑到用户的购买匿名性。具体研究分析了现有的群签名方案,并结合群签名技术,提出一种改进的具有匿名性的DRM系统模型,从而使得合法用户既具有购买匿名性,同时又可以揭露非法用户的真实身份。
The current Digital Rights Management(DRM) systems can only prevent illegal copying of digital content and protect the interests of content service providers,but it does not take full account of the buyers ' anonymous demand.By researching and analysising the existing group signature scheme, and combining the group signature technology,the paper puts forward an anonymous DRM model and makes the legal users have purchasing anonymity.Meanwhile the system can help fred the real identities of the illegal users.