With its decentralization, reliable database, security, and quasi anonymity, blockchain provides a new solution for data storage and sharing as well as privacy protection. This paper combines the advantages of blockchain and edge computing and constructs the key technology solutions of edge computing based on blockchain. On one hand, it achieves the security protection and integrity check of cloud data; and on the other hand, it also realizes more extensive secure multiparty computation. In order to assure the operating efficiency of blockchain and alleviate the computational burden of client, it also introduces the Paillier cryptosystem which supports additive homomorphism. The task execution side encrypts all data, while the edge node can process the ciphertext of the data received, acquire and return the ciphertext of the final result to the client. The simulation experiment proves that the proposed algorithm is effective and feasible.

中文翻译：

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基于区块链和边缘计算的同态加密与隐私保护方法

凭借其分散性，可靠的数据库，安全性和准匿名性，区块链为数据存储和共享以及隐私保护提供了新的解决方案。本文结合了区块链和边缘计算的优势，构建了基于区块链的边缘计算的关键技术解决方案。一方面，它实现了云数据的安全保护和完整性检查。另一方面，它还实现了更广泛的安全多方计算。为了保证区块链的运行效率并减轻客户端的计算负担，还引入了支持加性同态的Paillier密码系统。任务执行端对所有数据进行加密，而边缘节点可以处理接收到的数据的密文，获取最终结果的密文并将其返回给客户端。仿真实验证明了该算法的有效性和可行性。