![]() Then, an architectural model is proposed by using the execution times extracted from the prototype system for each associated component. To characterize the key components of our prior blockchain-based PHR system, a prototype system is firstly implemented and the execution time of each component is extracted. An architectural model is proposed to analyze the performance of the proposed blockchain-based PHR system, with the key aspect of ensuring the usability in practice. This article extends our prior work by evaluating the proposed blockchain-based PHR system on various number of users and various PHR data sizes under a real world scenario. Thus, a model-driven approach for predicting the performance of the blockchain-based PHR system is constructed. For that reason, the performance analysis is conducted in this work.Īs a result, an architectural model will be used for predicting the performance properties. 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. Only the achievement of the privacy and the security as well as the effectiveness of the proposed blockchain-based PHR system was shown. However, the usability evaluation is still lacking in our previous work. 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. The privacy and trust of Personal Health Record (PHR) system are improved by applying the blockchain technology, in our prior works. Open Access This is an open access article distributed under the CC BY-NC 4.0 license ( ). Further evaluation on the distributed design of the proposed blockchain-based PHR system is planned for our future work. ![]() The performance results indicated that the proposed blockchain-based PHR system can work within the emergency response time of 8 min and it is usable with an efficient computational cost. The result of simulating the architectural model shows that the proposed blockchain-based PHR system can response within 4 min for 60,000 accesses each day. The result shows that storing 32 MB of the PHR data takes 4.84 s and retrieving the same PHR data takes 5.19 s. ![]() Experiments are conducted with various data sizes including 128, 512 KB, 2, 8 and 32 MB. The key parameters for the architectural model are extracted from the prototype. The proposed blockchain-based PHR system prototype is implemented and the architectural model for the blockchain-based PHR system is also constructed. Thus, this article presents the performance analysis of the blockchain-based PHR system to ensure the usability in practice. Consequently, the performance becomes a concern for blockchain-PHR integration because of the blockchain performance issues in the past. The blockchain-based PHR system has been proposed recently to enhance the security and privacy for the PHR data. Usually commercial software or games are produced for sale or to serve a commercial purpose.The Personal Health Record (PHR) could be seen as a preventive care solution to the incoming aging society. Even though, most trial software products are only time-limited some also have feature limitations. After that trial period (usually 15 to 90 days) the user can decide whether to buy the software or not. Trial software allows the user to evaluate the software for a limited amount of time. Demos are usually not time-limited (like Trial software) but the functionality is limited. In some cases, all the functionality is disabled until the license is purchased. Demoĭemo programs have a limited functionality for free, but charge for an advanced set of features or for the removal of advertisements from the program's interfaces. In some cases, ads may be show to the users. Basically, a product is offered Free to Play (Freemium) and the user can decide if he wants to pay the money (Premium) for additional features, services, virtual or physical goods that expand the functionality of the game. This license is commonly used for video games and it allows users to download and play the game for free. There are many different open source licenses but they all must comply with the Open Source Definition - in brief: the software can be freely used, modified and shared. Programs released under this license can be used at no cost for both personal and commercial purposes. Open Source software is software with source code that anyone can inspect, modify or enhance. Freeware products can be used free of charge for both personal and professional (commercial use). Freeware programs can be downloaded used free of charge and without any time limitations.
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