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1.西北师范大学计算机科学与工程学院,甘肃兰州 730070
2.深圳技术大学大数据与互联网学院,广东深圳 518118
Received:06 July 2021,
Revised:2022-02-13,
Published:25 April 2023
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杨小东,周航,汪志松等.基于区块链的无线体域网无证书密文等值测试签密方案[J].电子学报,2023,51(04):922-932.
YANG Xiao-dong,ZHOU Hang,WANG Zhi-song,et al.Blockchain-Based Certificateless Signcryption Scheme with Equality Test for Wireless Body Area Network[J].ACTA ELECTRONICA SINICA,2023,51(04):922-932.
杨小东,周航,汪志松等.基于区块链的无线体域网无证书密文等值测试签密方案[J].电子学报,2023,51(04):922-932. DOI: 10.12263/DZXB.20210855.
YANG Xiao-dong,ZHOU Hang,WANG Zhi-song,et al.Blockchain-Based Certificateless Signcryption Scheme with Equality Test for Wireless Body Area Network[J].ACTA ELECTRONICA SINICA,2023,51(04):922-932. DOI: 10.12263/DZXB.20210855.
针对无线体域网密码方案中存在的密钥管理、密文检索与依赖可信第三方等问题,本文提出了一种基于区块链的无线体域网无证书密文等值测试签密方案.基于无证书签密机制,解决了传统方案中的密钥托管问题,保证了医疗数据的机密性与可认证性.利用等值测试技术,实现了对云端医疗密文的检索,减少了数据用户对重复数据解密的计算开销.引入区块链与智能合约技术,消除了等值测试操作对可信云服务器的依赖.利用雾节点执行部分解密计算,降低了数据用户解密时的计算开销.在随机预言模型下,基于计算性Diffie-Hellman困难问题证明了本文方案满足单向性.与同类方案相比,本文方案支持更多的安全属性,并具有较低的计算开销.
Aiming at the problems of key management
ciphertext retrieval and dependence on trusted third party
a blockchain-based certificateless signcryption scheme with equality test for wireless body area network is proposed. The certificateless signcryption solves the problem of key escrow and ensures the confidentiality and authentication of medical data. Meanwhile
the equality test technology is used to retrieve the medical ciphertext
which reduces the computational cost of data users to decrypt duplicate data. In addition
blockchain and smart contract are used to eliminate the dependence of trusted cloud servers. The fog nodes perform part of the decryption computation
which reduces the computation overhead of data users. Furthermore
the proposed scheme is proved to achieve one-way based on the computational Diffie-Hellman problem under the random oracle model. Compared with the similar schemes
the proposed scheme supports more security properties and has lower computational overhead.
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