Computer Science ›› 2020, Vol. 47 ›› Issue (4): 285-291.doi: 10.11896/jsjkx.190400001

Special Issue: Block Chain Technology

• Information Security • Previous Articles     Next Articles

Medical Data Storage Mechanism Integrating Blockchain Technology

WANG Hui, LIU Yu-xiang, CAO Shun-xiang, ZHOU Ming-ming   

  1. School of Computer Science and Technology,Nanjing University of Technology,Nanjing 211816,China
  • Received:2019-04-01 Online:2020-04-15 Published:2020-04-15
  • Contact: LIU Yu-xiang,born in 1996,postgra-duate,is member of China Computer Fe-deration(CCF).His main research inte-rests include blockchain and data secu-rity.
  • About author:WANG Hui, born in 1962,Ph.D,professor.Her main research interests include optical communication and signal processing.

Abstract: The Singularity and centrality of Medical Institutions’ existing database storage makes the security,integrity and traceability of electronic medical data impossible to be guaranteed,as a result,the medical privacy of patients is threatened.Although existing research has proposed a secure data storage scheme based on cloud storage,it needs to rely on a fully trusted third party to ensure the reliability of interaction.Therefore,this paper proposed a decentralized block chain information management scheme to achieve the safe storage of medical data.This scheme adopts improved PBFT consensus algorithm and optimized Hash encryption algorithm to store medical data safely and effectively in distributed database to ensure the integrity and traceabi-lity of medical data.At the same time,it proposes and designs a new data interaction system to prevent the direct interaction between the third party and the database,prevent the untrustworthy third party from maliciously destroying medical data and ensure the data.Finally,through access control and Lucene search mechanism to ensure patient privacy and achieve rapid retrieval of medical data.Experiments show that the improved PBFT consensus algorithm provides better stability and throughput than proof of work(POW) and delegated proof of stake (DPOS).Compared with the common database interaction,the data interaction system in this paper effectively prevents the direct operation of the database and has better security and tamper resistance.The experimental data show that the decentralized medical data storage system,the improved PBFT consensus algorithm and the data interaction system architecture have realized the security,traceability and tamper-proof of medical data,solved the difficulties of centralized storage,traceability and vulnerability of medical data,and laid a foundation for further promoting the application of block chain technology in the development of medical information industry.

Key words: Access control, Consensus algorithm, Data interaction, Medical blockchain, Privacy protection

CLC Number: 

  • TP393
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