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The privacy and trust of Personal Health Record (PHR) system [1,2] are improved by applying the blockchain technology, in our prior works [3]. The issues that affect the use of blockchain in the PHR development were introduced and addressed with an existing private blockchain and cryptographic mechanisms in our prior work [4]. However, the usability evaluation is still lacking in our previous work [4]. Only the achievement of the privacy and the security as well as the effectiveness of the proposed blockchainbased PHR system was shown. Since, the performance is a concern for the use of blockchain for the PHR development, the usability of the proposed blockchain-based PHR system must be addressed. For that reason, the performance analysis is conducted in this work.

Performance Analysis of Blockchain-based Access Control Model for Personal Health Record System with Architectural Modelling and Simulation