Yesterday South Korea made several announcements about using a blockchain application to act as a COVID-19 health certificate for vaccinations.
Prime minister Chung Sye-kyun is reported as saying “we have already completed the development of a system that can easily prove vaccination on a smartphone,” according to Yonhapnews.
A major reason for using blockchain is to verify that the vaccine was for a specific person, avoiding a situation where someone photocopies a vaccine certificate and alters the name. Usually, blockchain-based digital health passports provide verifiable credentials based on international standards (W3C). However, the technical details of the Korean version were not released.
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