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Open AccessArticle

Proof-of-Familiarity: A Privacy-Preserved Blockchain Scheme for Collaborative Medical Decision-Making

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Department of Healthcare and IT, Inje University, Gimhae 50834, Korea
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Department of Computer Engineering, Inje University, Gimhae 50834, Korea
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Department of Applied Mathematics, Inje University, Gimhae 50834, Korea
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School of Science, Edith Cowan University, Perth 6027, Australia
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Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(7), 1370; https://doi.org/10.3390/app9071370
Received: 13 February 2019 / Revised: 15 March 2019 / Accepted: 25 March 2019 / Published: 1 April 2019
(This article belongs to the Special Issue Advances in Blockchain Technology and Applications)
The current healthcare sector is facing difficulty in satisfying the growing issues, expenses, and heavy regulation of quality treatment. Surely, electronic medical records (EMRs) and protected health information (PHI) are highly sensitive, personally identifiable information (PII). However, the sharing of EMRs, enhances overall treatment quality. A distributed ledger (blockchain) technology, embedded with privacy and security by architecture, provides a transparent application developing platform. Privacy, security, and lack of confidence among stakeholders are the main downsides of extensive medical collaboration. This study, therefore, utilizes the transparency, security, and efficiency of blockchain technology to establish a collaborative medical decision-making scheme. This study considers the experience, skill, and collaborative success rate of four key stakeholders (patient, cured patient, doctor, and insurance company) in the healthcare domain to propose a local reference-based consortium blockchain scheme, and an associated consensus gathering algorithm, proof-of-familiarity (PoF). Stakeholders create a transparent and tenable medical decision to increase the interoperability among collaborators through PoF. A prototype of PoF is tested with multichain 2.0, a blockchain implementing framework. Moreover, the privacy of identities, EMRs, and decisions are preserved by two-layer storage, encryption, and a timestamp storing mechanism. Finally, superiority over existing schemes is identified to improve personal data (PII) privacy and patient-centric outcomes research (PCOR). View Full-Text
Keywords: healthcare data security; clinical data sharing; blockchain; data privacy; shared decision-making; medical information sharing; PoF; cryptography; healthcare; distributed ledger healthcare data security; clinical data sharing; blockchain; data privacy; shared decision-making; medical information sharing; PoF; cryptography; healthcare; distributed ledger
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Yang, J.; Onik, M.M.H.; Lee, N.-Y.; Ahmed, M.; Kim, C.-S. Proof-of-Familiarity: A Privacy-Preserved Blockchain Scheme for Collaborative Medical Decision-Making. Appl. Sci. 2019, 9, 1370.

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