基于离散对数难解性的数字指纹体制

利用线性方程组解的结构,基于离散对数问题的难解性构造了一种数字指纹体制。将要发行的拷贝使用对称密码体制加密,而用户解密含有加密后拷贝的加密数据组使用的密钥是线性方程组的解向量,因此方案具有较好的实现效率。通过引入完全可信的第三方,不仅增加了用户的安全性,还能帮助发行商确定性地跟踪叛逆者。

Digital fingerprinting scheme based on discrete logarithm

This paper uses the structure of linear equations’ solutions present a digital fingerprinting scheme based on discrete logarithm. It uses symmetric encryption to encrypt the copy that will be published, and custom uses solution vector of linear equations to decrypt coded data which has encrypted copy, so the scheme has rather efficient in implementing. By introducing authentic third party, it increases the safety of customs, and helps data distributor to trace traitor determinately.