改进的数字版权保护模型

Improved digital copyright protection model

为有效解决目前数字版权保护模型中存在的对称性和不具备可撤销性等问题,提出了一种改进的基于叛逆者追踪方案的数字版权保护模型。该改进模型应用了不经意多项式估值(OPE)协议的特点,用户在注册阶段,商家和用户同时执行OPE协议,真正实现了两者之间的非对称性。针对买家付款后却可能收不到产品的问题,新模型还引进了既可以保护商家利益又可以保护用户利益的可信中心(TC),使其更具有实用性。改进模型还增加了软件服务撤销功能,该算法进一步完善了版权保护。通过具体实例表明了该模型的可行性和有效性。

To solve the symmetry and the non-revocation of current digital copyright protection model,an improved model based on traitor tracing scheme is proposed.This improved model applied oblivious polynomial evaluation（OPE） protocol features.In the user registration phase.Merchants and users simultaneously execute OPE,non-symmetry truly is carried out between both.Aiming at the problems of failing to receive the service after paying for the product,a trusted center（TC） which protects the merchant＇s and the buyers＇ interest is introduced to the model and makes the latest more practical.Furthermore,a software revocation procedure is also proposed in the improved model which enhanced copyright protection.Finally,a concrete example is presented to verify the feasibility and efficiency of the method.