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HealthyBlockchain for Global Patients

Computers, Materials & Continua 2021年第8期68卷 2431-2449页

作者： shada A.alsalamah Hessah A.alsalamah Thamer Nouh Sara A.alsalamah College of Computer and Information Sciences King Saud UniversityRiyadh11451Saudi Arabia Digital Health and Innovation Science DivisionWorld Health OrganizationGenevaCH-1211Switzerland MIT Department of Mechanical Engineering Massachusetts Institute of Technology(MIT)Cambridge02139MAUSA College of Engineering and Architecture Al Yamamah UniversityRiyadh11451Saudi Arabia Trauma and Acute Care Surgery Unit College of MedicineKing Saud UniversityRiyadh11451Saudi Arabia College of Computer and Information Sciences Al Imam Mohammad Ibn Saud Islamic UniversityRiyadh13318Saudi Arabia

An emerging healthcare delivery model is enabling a new era of clinical care based on well-informed decision-making *** healthcare information systems(HISs)fall short of adopting this model due to a conflict between information security needed to implement the new model and those already enforced locally to support traditional care ***,in recent times,the healthcare sector has shown a substantial interest in the potential of using blockchain technology for providing quality care to *** blockchain solution proposed so far has fully addressed emerging cross-organization information-sharing needs in *** this paper,we aim to study the use of blockchain in equipping struggling HISs to cope with the demands of the new healthcare delivery model,by proposing HealthyBlockchain as a granular patient-centered ledger that digitally tracks a patient’s medical transactions all along the treatment pathway to support the care *** patient-centered ledger is a neutral tamper-proof trail timestamp block sequence that governs distributed patient information across the decentralized discrete *** connects patients,clinicians,and healthcare providers to facilitate a transparent,trustworthy,and secure supporting platform.

关键词： Blockchain eHealth electronic health record global patient healthcare information system information security legacy system patient-centered care privacy smart contract trust

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A Credit-Based Approach for Overcoming Free-Riding Behaviour in Peer-to-Peer Networks

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Computers, Materials & Continua 2019年第4期59卷 15-29页

作者： Manal Hazazi Afnan Almousa Heba Kurdi Shiroq Al-Megren shada alsalamah College of Computer and Information Science King Saud UniversityRiyadh 11642Saudi Arabia Mechanical Engineering Department Massachusetts Institute of Technology(MIT)CambridgeMA 02139USA

The underlying premise of peer-to-peer(P2P)systems is the trading of digital resources among individual peers to facilitate file sharing,distributed computing,storage,collaborative applications and multimedia ***-called free-riders challenge the foundations of this system by consuming resources from other peers without offering any resources in return,hindering resource exchange among ***,immense effort has been invested in discouraging free-riding and overcoming the ill effects of such unfair use of the ***,previous efforts have all fallen short of effectively addressing free-riding behaviour in P2P *** paper proposes a novel approach based on utilising a credit incentive for P2P networks,wherein a grace period is introduced during which free-riders must reimburse *** contrast to previous approaches,the proposed system takes into consideration the upload rate of peers and a grace *** system has been thoroughly tested in a simulated environment,and the results show that the proposed approach effectively mitigates free-riding *** to previous systems,the number of downloads from free-riders decreased while downloads by contributing peers *** results also show that under longer grace periods,the number of downloads by fast peers(those reimbursing the system within the grace period)was greater than the number of downloads by slow peers.

关键词： Peer-to-peer network free-riding file sharing credit

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