With the features of decentralization and trustlessness and through distributed data storage, point-to-point transmission, and encryption algorithms, blockchain has shed new light on the security and protection of medical data, and it can resolve the contradiction between data sharing and privacy protection with proper security strategies. In this paper, we integrate the strengths of both blockchain and cloud computing and build the privacy protection scheme for medical data based on blockchain and cloud computing. This scheme introduces cloud computing and provides services to blockchain nodes with cloud server computing; meanwhile, it collects, analyzes, processes, and maintains medical data in the identity authentication interface and solves the insufficient computing abilities of some nodes in blockchain so as to verify the authenticity and reliability of data. The simulation experiment proves that the proposed scheme is effective. It can achieve the secure protection and integrity verification of medical data and address the problems of high computing complexity, data sharing, and privacy protection.

中文翻译：

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基于区块链和云计算的医疗数据隐私保护方案

区块链具有去中心化和不信任的特点，并通过分布式数据存储，点对点传输和加密算法，为医疗数据的安全性和保护性提供了新的亮点，可以解决数据共享与隐私保护之间的矛盾采取适当的安全策略。本文结合区块链和云计算的优势，构建基于区块链和云计算的医疗数据隐私保护方案。该方案引入了云计算，并通过云服务器计算为区块链节点提供服务；同时，它收集，分析，处理，在身份认证界面中维护医疗数据，解决区块链中某些节点的计算能力不足，以验证数据的真实性和可靠性。仿真实验证明了该方案的有效性。它可以实现医疗数据的安全保护和完整性验证，并解决计算复杂性高，数据共享和隐私保护的问题。