The essence of “blockchain” is a shared database in which information stored is un-falsifiable, traceable, open, and transparent. Therefore, to improve the security of private information in medical systems, this article uses blockchain technology to design a method to protect private information in medical systems and effectively realize anti-theft control of private information. First, the Patient-oriented Privacy Preserving Access Control model is introduced into the access control process of private information in medical systems. Next, a private information storage platform is built by using blockchain technology, and information transmission is realized using standard cryptographic algorithms. In this process, file authorization contracts are also used to guarantee the security of private information and further prevent theft of medical private information. Our simulation results show that the storage response time of this method is kept below 1,000 ms, and the maximum information throughput rate reaches 550 kbit/s, which indicates that this method has strong performance in information storage and transmission efficiency. Moreover, the reliability and bandwidth utilization of data transmission across domains is higher, so the method has higher information security control performance and superior overall performance.

中文翻译：

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基于区块链技术的医疗系统患者信息安全与隐私

“区块链”的本质是一个共享数据库，其中存储的信息不可篡改、可追溯、公开透明。因此，为提高医疗系统隐私信息的安全性，本文利用区块链技术设计了一种保护医疗系统隐私信息的方法，有效实现隐私信息的防盗控制。首先，将面向患者的隐私保护访问控制模型引入到医疗系统隐私信息的访问控制过程中。其次，利用区块链技术搭建私有信息存储平台，利用标准密码算法实现信息传输。在这个过程中，文件授权合同还用于保障隐私信息的安全，进一步防止医疗隐私信息被盗。我们的仿真结果表明，该方法的存储响应时间保持在1000 ms以下，最大信息吞吐率达到550 kbit/s，表明该方法在信息存储和传输效率方面具有较强的性能。而且，跨域数据传输的可靠性和带宽利用率更高，因此该方法具有更高的信息安全控制性能和优越的综合性能。说明该方法在信息存储和传输效率方面具有较强的性能。而且，跨域数据传输的可靠性和带宽利用率更高，因此该方法具有更高的信息安全控制性能和优越的综合性能。说明该方法在信息存储和传输效率方面具有较强的性能。而且，跨域数据传输的可靠性和带宽利用率更高，因此该方法具有更高的信息安全控制性能和优越的综合性能。