Jeju Island, a southern island in South Korea, is one of the most popular tourist destinations for Koreans and has about 15 million visitors annually.
It now requires those visitors to use a decentralized identity (DID) blockchain technology based app that claims to offer private, secure COVID-19 contact tracing. An August 19 announcement said that Jeju Province had reached an agreement with South Korean blockchain company ICONLOOP to introduce the system.