New Blockchain Technology for Medical Big Data Security Sharing
SHE Wei1，2 ，CHEN Jian-sen2，LIU Qi1，HU Yue2，GU Zhi-hao1，TIAN Zhao1，LIU Wei1 ，2
1（School of Software Technology，Zhengzhou University，Zhengzhou 450000，China）2（Cooperative Innovation Center of Internet Healthcare，Zhengzhou University，Zhengzhou 450000，China）
Abstract：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 blockchainbased allhomomorphic 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 all-homomorphic 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.
佘维,陈建森,刘琦,胡跃,顾志豪,田钊,刘炜,. 一种面向医疗大数据安全共享的新型区块链技术[J]. 小型微型计算机系统, 2019, 40(7): 1449-1454.
SHE Wei,CHEN Jian-sen,LIU Qi,HU Yue,GU Zhi-hao,TIAN Zhao,LIU Wei,. New Blockchain Technology for Medical Big Data Security Sharing. Journal of Chinese Computer Systems, 2019, 40(7): 1449-1454.
2019, Vol. 40 
