Application of Blockchain to Maintaining Patient Records in Electronic Health Record for Enhanced Privacy, Scalability, and Availability

Dara Tith; Joong-Sun Lee; Hiroyuki Suzuki; W. M. A. B. Wijesundara; Naoko Taira; Takashi Obi; Nagaaki Ohyama

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자료유형: 학술저널

저자정보: Dara Tith Joong-Sun Lee Hiroyuki Suzuki W. M. A. B. Wijesundara Naoko Taira Takashi Obi Nagaaki Ohyama

저널정보: 대한의료정보학회 Healthcare Informatics Research Healthcare Informatics Research 제26권 제1호

발행연도: 2020.1

수록면: 3 - 12 (10page)

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Objectives: Electronic Health Record (EHR) systems are increasingly used as an effective method to share patients’ records among different hospitals. However, it is still a challenge to access scattered patient data through multiple EHRs. Our goal is to build a system to access patient records easily among EHRs without relying on a centralized supervisory system. Methods: We apply consortium blockchain to compose a distributed system using Hyperledger Fabric incorporating existent EHRs. Peer nodes hold the same ledger on which the address of a patient record in an EHR is written. Individual patients are identified by unique certificates issued by a local certificate authorities that collaborate with each other in a channel of the network. To protect a patient’s privacy, we use a proxy re-encryption scheme when the data are transferred. We designed and implemented various chaincodes to handle business logic agreed by member organizations of the network. Results: We developed a prototype system to implement our concept and tested its performance including chaincode logic. The results demonstrated that our system can be used by doctors to find patient’s records and verify patient’s consent on access to the data. Patients also can seamlessly receive their past records from other hospitals. The access log is stored transparently and immutably in the ledger that is used for auditing purpose. Conclusions: Our system is feasible and flexible with scalability and availability in adapting to existing EHRs for strengthening security and privacy in managing patient records. Our research is expected to provide an effective method to integrate dispersed patient records among medical institutions.

참고문헌 (25)

참고문헌 신청

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Pylypchuk Y / 2018 / Variation in Interoperability among US non-federal acute care hospitals in 2017 / ONC Data Brief (42):1~15

CommonWell Health Alliance / About CommonWell

CommonWell Health Alliance / Use cases and specifications

van der Linden H / 2009 / Interorganizational future proof EHR systems : a review of the security and privacy related issues / Int J Med Inform 78(3):141~160

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