一种高效非对称的动态公钥叛逆者追踪方案  

An efficient asymmetric dynamic public-key traitor tracing scheme

作　　者：李勇[1] 杨波[1] 

机构地区：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2003年第5期654-658,712,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(69972034);国家部委重点实验室资助项目(51436060301DZ0103)

摘　　要：应用不经意多项式估值协议构造了一种非对称的公钥叛逆者追踪方案,该方案具有无需任何可信方和不泄漏用户敏感信息(如信用卡号码或数字签字密钥)的非对称追踪能力,并有自身强化性、直接不可否认性、防诬陷性等特性.更重要的是,数据供应商能够动态地撤销或恢复某个叛逆者解密密钥的解密权限,而无需更新其他用户的解密密钥.该方案与现有的对称或非对称叛逆者追踪方案相比是高效的.By applying the oblivious polynomial evaluation protocol, we present an asymmetric publickey traitor tacing scheme, which supports the asymmetric traceability without any trusted third party(s), does not reveal users sensitive information (e.g., the credit card number, the secret key of digital signature) to any entities and offers selfenforcement, direct nonrepudiation and full frameproof. It is important that our scheme dynamically revoke or restore the decryption privilege of the traitorss personal key without updating any personal key of the remaining users. Moreover, compared with the previous symmetric or asymmetric publickey traitor tracing schemes, our shceme is very efficient.

关 键 词：非对称追踪 防诬陷性 直接不可否认性 自身强化性 叛逆者追踪 公钥 

分 类 号：TN918.1[电子电信—通信与信息系统]