一种面向医疗大数据安全共享的新型区块链技术

New Blockchain Technology for Medical Big Data Security Sharing

海量的医疗数据不仅蕴含巨大价值,也隐含大量的个人隐私.针对医疗数据的信息安全问题,本文提出一种基于区块链的全同态医疗数据安全共享方案,在去中心化网络中可对密文状态的医疗数据进行计算和应用.通过区块链技术和全同态加密技术结合,首先将中心化网络中的医疗机构、患者和第三方的数据处理中心等中心化节点映射在区块链网络中实现去中心化达到各节点完全信任.然后通过智能合约调用全同态加密算法实现在共享双方间只有密文数据传输并且可以进行密文计算.最终实现在不影响医疗大数据分析和实际应用的情况下,确保个人数据的隐私安全、数据授权分发和安全传输的目标.

Massive medical data not only contains great value,but also implies a great deal of personal privacy.For the information security of medical data,this paper proposes a blockchain-based all-homomorphic medical data security sharing scheme,which can calculate and apply medical data in ciphertext state in a decentralized network.Through the combination of blockchain technology and allhomomorphic encryption technology,the mapping of centralized nodes such as medical institutions,patients,and third-party data processing centers in the centralized network is first implemented in the blockchain network to achieve decentralization and completeness of the nodes trust.Then,the full homomorphic encryption algorithm is invoked through the smart contract to implement the transmission of ciphertext data between the two parties and the ciphertext calculation can be performed.The ultimate goal is to ensure personal data privacy,data distribution,and secure transmission without affecting the analysis and practical application of medical big data.