COVID-19 Contact Tracing Using Blockchain

摘要: Contact tracing has widely been adopted to control the spread of Coronavirus-2019 (COVID-19). It enables identify, assess, and manage people who have exposed COVID-19, thereby preventing from its further transmission. Today’s most contact approaches, tools, solutions fall short in providing decentralized, transparent, traceable, immutable, auditable, secure, trustworthy features. In this paper, we propose a decentralized blockchain-based COVID-19 solution. can greatly suffice need for speedy response pandemic. We leverage immutable tamper-proof features blockchain enforce trust, accountability, transparency. Trusted registered oracles are used bridge gap between on-chain off-chain data. With no third parties involved or centralized servers, users’ medical information is not prone invasion, hacking, abuse. Each user using their digital passports. To respect privacy users, locations updated with time delay 20 minutes. Using Ethereum smart contracts, transactions executed emitted events logs. present details implemented algorithms testing analysis. evaluate proposed approach security, cost, parameters show effectiveness. The contracts code publicly made available on GitHub.