A Proxy Re-encryption Scheme of Medical Data Sharing Based on Consortium Blockchain

Abstract

AbstractIn order to solve the problem of sharing medical data among different hospitals, this paper proposes a multi-party secure sharing scheme of medical information based on a consortium blockchain. Based on proxy re-encryption technology and user identity attributes, the scheme divides the permissions of data users in fine granularity, and solves the problems of data tracking and access control, uses cloud computing to store medical data, reduces the capital investment of hospital hardware equipment, reduces maintenance costs, and uses NTRU encryption technology to ensure the anonymity and anti-collusion security of medical data. Using Federation chains to store and record data operations ensures the safe sharing of data. The performance evaluation results show that the proposed re-encryption scheme for shared medical data agents based on a consortium blockchain has higher superiority in data protection, privacy security, rights allocation, etc. Compared with blockchain work in recent years, the result shows that the scheme has certain superiority. The purpose of this scheme is to provide new ideas for the safe sharing of medical data in the future.KeywordsBlockchainIdentity based proxy re-encryptionAuthority access controlNTRU encryptionCloud storage