摘要
为了更好地保护数据提供商和合法用户的实际利益,以及给合法用户提供多种服务,将会话密钥S分解成S1与S2之和,在大整数分解困难问题的条件下,构造特殊等式来解密S1(方案1)。在离散对数困难问题的条件下,利用不经意多项式估值协议(OPE)和拉格朗日插值多项式来解密S2(方案2)。在两种方案组合的基础上形成一种新的叛逆者追踪方案。新方案具有多服务性、抗共谋、非对称性、黑盒子追踪、前向安全性和后向安全性等优点,综合性能好于现有方案。
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 St and S2. Under the condition of large integer factoring problem, S1 was decrypted by constmcting 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.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2006年第4期110-116,共7页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(60372046)
华为基金资助项目(YSCB2005037NP)
关键词
多服务
抗共谋
非对称
黑盒子追踪
前向安全性
后向安全性
multiple-service
collusion-resistance
asynanetric
black-box tracing
forward-security
backward-security
