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 S1 and S2. Under the condition of large integer factoring problem, S1 was decrypted by constructing a special equation (scheme 1). Under the condition of discrete logarithm problem, S2 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.
