多属性中心密文定长属性加密访问控制方案  

Attribute-based encryption access control scheme of multiple attribute centers with constant size ciphertexts

作　　者：杨念 滕玮 韩斌 黄树成 YANG Nian;TENG Wei;HAN Bin;HUANG Shu-cheng(School of Computer Science,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学计算机学院

出　　处：《计算机工程与设计》2019年第10期2765-2772,共8页Computer Engineering and Design

基　　金：国家自然科学基金项目(61772244);江苏省研究生科研与实践创新计划基金项目(SJCX18_0771)

摘　　要：针对单属性中心CP-ABE方案存在计算量过于集中、不适合分布式云计算环境等问题,提出一种适合在分布式环境中的多属性中心CP-ABE方案。用户私钥由多个属性中心共同生成,显著缩减私钥生成时间,构造抗私钥合谋函数,抵御不同用户间的合谋解密。实现密文定长,密文不随着属性个数和属性中心个数的增加而增加,可以降低网络通信的带宽要求。在选择性密文攻击的情况下完成其安全性证明。Considering the single attribute center CP-ABE scheme which is too centralized in the calculations and is not suitable for distributed cloud computing environment,etc.,a multiple attribute centers CP-ABE scheme that was suitable for distributed cloud computing environment was proposed.The user’s private key of the scheme was generated by multiple attribute centers,which significantly reduced the time cost of private key generation,and an anti-private key collusion function was constructed,which resisted the collusion and decryption between different users.The constant size of the ciphertext was realized,the ciphertext did not increase with the increase of the number of attributes and the number of the attribute centers,which reduced the bandwidth requirements of the network communication.The security of the scheme was proved to be safe in the case of a selective ciphertext attack.

关 键 词：多属性中心 密文策略属性加密 密文定长 抗合谋攻击 选择密文攻击 

分 类 号：TP391.1[自动化与计算机技术—计算机应用技术]