Security research of blockchain technology in electronic medical records

Background: A blockchain-based Electronic Health Record(EHR) data-sharing scheme was proposed to solve the problems of data sharing difficulties and privacy disclosure. Methods: This paper designs a blockchain-based electronic health record model based on the characteristics of blockchain antitampering, decentralization, and distributed storage. Utilize blockchain network and distributed database to store encryption-related access control policies to prevent EHR data from being tampered with and leaked. Data security sharing protocol combines Distributed Key Generation (DKG) and reencryption. Results: The protocol used the Delegated Proof of Stake(DPOS) algorithm to select the proxy node, which reencrypted the EHR to share data between a pair of users. Simulation experiments and comparative analysis showed that DPOS efficiency was higher than Proof of Work (POW) and slightly lower than the Practical Byzantine Fault Tolerance(PBFT). Conclusions: The scheme proposed in this paper is more decentralized and less computationally intensive.

Automated summary

This paper proposes a blockchain-based electronic health record model to address the issues of data sharing difficulties and privacy disclosure. The results show that using the DPOS algorithm can achieve efficient data sharing with lower computational intensity.