基于区块链的可验证外包解密属性基加密方案  

Attribute-based Encryption Scheme with Verifiable Outsourcing Decryption Based on Blockchains

作　　者：李琳[1] LI Lin(School of Intelligent Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China)

机构地区：[1]郑州航空工业管理学院智能工程学院,河南郑州450046

出　　处：《郑州航空工业管理学院学报》2022年第5期86-91,107,共7页Journal of Zhengzhou University of Aeronautics

摘　　要：在物联网和云计算场景中,属性基加密是实现细粒度及多级安全访问的关键技术。但是现有的属性基加密方案存在解密成本高、访问策略表达效率低以及数据安全性差等缺陷。基于此,文章提出了一种基于区块链的可验证外包解密的属性基加密方案。采用合数阶双线性群实现了策略隐藏,不仅将区块链作为可信的数据库保存用户参数,而且通过智能合约自动运算外包验证算法,在实现策略隐藏的同时降低了数据使用者的本地运算量,提高了计算效率。In the scenarios of the Internet of Things and cloud computing,attribute-based encryption is the key tech nology to achieve fine-grained and multi-level security access.However,the existing attribute-based encryption schemes have some drawbacks,such as high decryption cost,inefficient expression of access policy and poor data security.Based on these drawbacks,this paper proposes an attribute-based encryption scheme for verifiable outsourcing decryption based on blockchains.A policies-hidden scheme is implemented by using composite order bilinear groups.Not only the blockchains are used as trusted databases to store user parameters,but also the outsourcing algorithm can be verified automatically through smart contracts.The scheme can realize policy hiding while reducing the computational overhead of DUs and effectively improving the computing efficiency.

关 键 词：属性基加密 区块链 合数阶双线性群 策略隐藏 外包解密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]