Journal of Medical Systems

, 42:136 | Cite as

MedBlock: Efficient and Secure Medical Data Sharing Via Blockchain

  • Kai FanEmail author
  • Shangyang Wang
  • Yanhui Ren
  • Hui Li
  • Yintang Yang
Systems-Level Quality Improvement
Part of the following topical collections:
  1. Blockchain-based Medical Data Management System: Security and Privacy Challenges and Opportunities


With the development of electronic information technology, electronic medical records (EMRs) have been a common way to store the patients’ data in hospitals. They are stored in different hospitals’ databases, even for the same patient. Therefore, it is difficult to construct a summarized EMR for one patient from multiple hospital databases due to the security and privacy concerns. Meanwhile, current EMRs systems lack a standard data management and sharing policy, making it difficult for pharmaceutical scientists to develop precise medicines based on data obtained under different policies. To solve the above problems, we proposed a blockchain-based information management system, MedBlock, to handle patients’ information. In this scheme, the distributed ledger of MedBlock allows the efficient EMRs access and EMRs retrieval. The improved consensus mechanism achieves consensus of EMRs without large energy consumption and network congestion. In addition, MedBlock also exhibits high information security combining the customized access control protocols and symmetric cryptography. MedBlock can play an important role in the sensitive medical information sharing.


Medical data sharing Blockchain Security Privacy preserving Openness Efficiency 



This study was funded by the National Key R&D Program of China (No. 2017YFB0802300), the National Natural Science Foundation of China (No. 61772403 and No. U1401251), Natural Science Basic Research Plan in Shaanxi Province of China (No. 2017JM6004), and National 111 Program of China B16037 and B08038.

Compliance with Ethical Standards

Conflict of Interest

Kai Fan declares that he has no conflict of interest. Shangyang Wang declares that he has no conflict of interest. Yanhui Ren declares that he has no conflict of interest. Hui Li declares that he has no conflict of interest. Yintang Yang declares that he has no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Integrated Service NetworksXidian UniversityXi’anChina
  2. 2.Key Lab. of Minist. of Educ. for Wide Band-Gap Semicon. Materials and DevicesXidian UniversityXi’anChina

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