支持策略动态更新的多机构属性基加密方案

发布时间：2019-04-15 12:09

【摘要】：属性基加密方案被认为是云存储环境下数据资源访问控制的最佳选择,但是策略更新很大程度上限制了其在实际中的应用。针对此问题,提出一种支持策略动态更新的多机构属性基加密方案。该方案引入匿名密钥分发协议为用户生成私钥,有效地保护用户的隐私,并抵抗属性机构的共谋攻击。另外,方案采用动态策略更新算法,支持任何类型的策略更新,大大减少传统策略更新中的计算和通信开销。经安全性分析证明,方案在标准模型下满足自适应选择明文攻击安全。通过对比,用户私钥和密文长度都有所减少,密文更新交给云服务器完成,降低了数据拥有者的工作量,更加贴近实际应用。
[Abstract]:Attribute-based encryption scheme is considered to be the best choice for data resource access control in cloud storage environment, but policy update limits its application in practice to a great extent. In order to solve this problem, a multi-mechanism attribute-based encryption scheme which supports dynamic updating of policy is proposed. In this scheme, the anonymous key distribution protocol is introduced to generate the private key for the user to effectively protect the privacy of the user and resist the complicity attack of the attribute authority. In addition, the scheme adopts dynamic policy update algorithm to support any kind of policy update, which greatly reduces the computation and communication overhead in the traditional policy update. The security analysis shows that the scheme satisfies the security of adaptive selection plaintext attack under the standard model. By comparison, the length of the user's private key and ciphertext is reduced, and the encryption update is handed over to the cloud server, which reduces the workload of the data owner and is closer to the practical application.
【作者单位】：河南理工大学计算机科学与技术学院;北京印刷学院信息工程学院;
【基金】：国家自然科学基金资助项目(No.61300216) 河南省科技厅基金资助项目(No.132102210123) 河南省教育厅科研基金资助项目(No.16A520013) 河南理工大学2015年青年骨干教师基金资助项目~~
【分类号】：TP309.7

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