抗共谋的非对称公钥叛逆者追踪方案

将会话密钥S分解成S1与S2之和,利用特殊线性方程组的解来解密S1(方案1),利用中国剩余定理来解密S2(方案2)。但方案1不能够提供非对称性(防抵赖性),方案2不能够抵抗共谋攻击。在两种方案组合的基础上形成一种新的叛逆者追踪方案。新方案兼有前两种方案的共同优点,同时又弥补了它们各自的不足。新方案具有抗共谋性、非对称性、黑盒子追踪等优越特性。

Collusion-resistant asymmetric public key traitor tracing scheme

The session key S is divided into a sum of S1 and S2. S1 is decrypted by the solution of a special linear equations set (scheme 1).S2 is decrypted by Chinese Remainder Theorem(scheme 2).But the scheme 1 does not provide asymmetry(non-repudiation) and the scheme 2 does not resist collusion attack. On the basis of a combination of the scheme 1 and the scheme 2,a new traitor tracing scheme is formed,which has both advantages of them,meanwhile overcomes their disadvantages.It has many advantages such as collu- sion-resistance,asymmetry,and black-box tracing.