A New Multi-service Oriented Collusion-resistant Asymmetric Traitor Tracing Scheme
Xuejun Zhang, Zhengtao Jiang · Journal of Sichuan University · 2006
To protect the profit of DS(Data Supplier) and authorized users better and provide multiple services for users,a new multi-service oriented collusion-resistant asymmetric traitor tracing scheme was proposed,in which the session key S was divided into a sum of S_1 and S_2.Under the condition of large integer factoring problem,S_1 was decrypted by constructing a special equation(scheme 1).Under the condition of discrete logarithm problem,S_2 was decrypted by OPE(Oblivious Polynomial Evaluation) protocol and Lagrange Interpolation Polynomial(scheme 2).On the basis of the combination of the scheme 1 and scheme 2,a new traitor tracing scheme was formed.The new scheme has many advantages such as multi-service,collusion-resistance,asymmetry,black-box tracing,forward-security and backward-security,and its whole capabilities is also better than existing ones.