Department of Artificial Intelligence Convergence, Pukyong National University, Busan 48513, Korea.
Department of Computer Engineering, Donga University, Busan 49315, Korea.
Sensors (Basel). 2022 Jun 2;22(11):4256. doi: 10.3390/s22114256.
Due to its significant global impact, both domestic and international efforts are underway to cure the infection and stop the COVID-19 virus from spreading further. In resource-limited environments, overwhelmed healthcare institutions and surveillance systems are struggling to cope with this epidemic, necessitating a specific strategic response. In this study, we looked into the COVID-19 situation and to establish trust, accountability, and transparency, we employed blockchain's immutable and tamper-proof properties. We offered a smart contract (SC)-based solution (Block-HPCT) that has been successfully tested to preserve a digital health passport (DHP) for vaccine recipients; also, for contact tracing (CT) we employed proof of location concept, which aids in a swift and credible response directly from the appropriate healthcare authorities. To connect on-chain and off-chain data, trusted and registered oracles were integrated and to provide a double layer of security along with symmetric key encryption; both Interplanetary File System (IPFS) and Hyperledger Fabric were merged as storage center. We also provided a full description of the suggested solution's system design, implementation, experiment results, and evaluation (privacy and cost analysis). As per the findings, the suggested approach performed satisfactorily across all significant assessment criteria, implying that it can lead the way for practical implementations and also can be used for similar types of situations where contact tracing of infectious can be crucial.
由于其重大的全球影响，国内外都在努力治愈感染并阻止 COVID-19 病毒进一步传播。在资源有限的环境中，不堪重负的医疗机构和监测系统正在努力应对这一疫情，需要采取特定的战略应对措施。在这项研究中，我们研究了 COVID-19 情况，并为了建立信任、问责制和透明度，我们利用了区块链的不可变和防篡改特性。我们提供了一个基于智能合约 (SC) 的解决方案 (Block-HPCT)，该方案已成功用于为疫苗接种者保存数字健康护照 (DHP)；对于接触者追踪 (CT)，我们采用了位置证明的概念，这有助于相关医疗机构迅速、可信地做出回应。为了连接链上和链下数据，我们整合了可信和注册的预言机，并通过对称密钥加密提供了双层安全性；同时，我们合并了星际文件系统 (IPFS) 和超级账本结构作为存储中心。我们还详细描述了建议解决方案的系统设计、实现、实验结果和评估（隐私和成本分析）。根据研究结果，所提出的方法在所有重要评估标准中表现良好，这意味着它可以为实际实施提供指导，也可以用于类似的传染病接触者追踪至关重要的情况。
