摘要
针对健康医疗数据隐私加密控制系统存在的访问延时增长率高、密文大、数据安全系数低等问题,设计基于区块链技术对健康医疗数据隐私加密控制系统;采用C/S体系结构,设计4层的基于区块链技术的的加密控制系统硬件;在系统软件设计中,采用基于无证书公钥体制的内容提取签名方案,加密隐私数据;引入区块链技术,设计数据加密访问控制方法MDACSC,将后序遍历策略树匹配算法与分类分级属性算法应用到访问控制结构,完成健康医疗数据的加密访问控制;采用PoP-DPoS算法改进共识机制,优化加密控制方法;经实验测试实现了健康医疗数据隐私的加密控制,结果表明:该模型访问时延增长率较低,具有平稳、高效的访问控制性能,密文小、加密成本低,解密成本极高,并且数据安全系数达到了0.98,说明该系统总体应用效果良好。
Aiming at the problems of the health and medical data privacy encryption control system,such as high access delay growth rate,large ciphertext and low data security factor,a health and medical data privacy encryption control system based on blockchain technology is designed.The client/server(C/S)architecture is adopted to design a 4-layer encryption control system hardware based on blockchain technology.In the system software design,the content extraction signature scheme based on certificateless public key system is adopted to encrypt private data.Blockchain technology is introduced to design the data encryption access control method MDACSC,which applies the post-order traversal policy tree matching algorithm and classification attribute algorithm to access the control structure,and complete the encrypted access control of health and medical data.The PoP-DPoS algorithm is used to improve the consensus mechanism and optimize the encryption control method.After experimental testing,it achieves the encryption control of health and medical data privacy,and the experimental results demonstrate that the proposed model has a lower growth rate of access delay and stable and efficient access control performance,the ciphertext size is small,and the encryption cost is low,while the decryption cost is extremely high.Furthermore,the data security coefficient reaches 0.98,indicating that the system has a good application effect.
作者
孙煦
SUN Xu(Beijing Daxing District People s Hospital,Beijing 102600,China;Wuhan University of Technology,Wuhan 430070,China)
出处
《计算机测量与控制》
2024年第3期188-194,共7页
Computer Measurement &Control
关键词
区块链技术
无证书公钥体制
健康医疗数据
DPoS算法
隐私
加密访问控制
blockchain technology
certificateless public key infrastructure
health and medical data
DPoS algorithm
privacy
encrypted access control
