一種支持多頻道服務的抗共謀的非對稱公鑰叛逆者追蹤方案
A Collusion-Resistant Asymmetric Public-Key Traitor Tracing Scheme for Multi-channel Services
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摘要: 該文提出一種新的叛逆者追蹤方案，將會話密鑰S分解成S1與S2之和?；陔x散對數(shù)困難問題，引入多頻道服務參數(shù)和特殊多項式函數(shù)來解密S1，利用中國剩余定理來解密S2。新方案具有支持多頻道服務、抗共謀、非對稱性、用戶密鑰的耐用性、黑盒子追蹤等優(yōu)點，并且在DDH(Diffie-Hellman Problem)困難問題的假設下證明了新方案是語義上安全的，通過分析表明新方案的整體性能明顯好于已有方案。Abstract: A new traitor tracing scheme is proposed , whose essential idea is the session key S is divided into a sum of S1 and S2. Based on DL(discrete logarithm)problem, S1 is decrypted by introducing a multi-channel service parameter and a special polynomial function, S2 is decrypted by Chinese Remainder Theorem. The new scheme has many advantages such as multi-service, collusion-resistance, asymmetry, long-lived subscribers key and black-box tracing. It is proved to be semantically secure under the DDH (Diffie-Hellman Problem) assumption and its whole capabilities are much better than that of the existing ones.
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