감염병 예방을 위한 분산ID 기반 디지털 증명서 시스템
Decentralized Identity Based Digital Certificate System for Prevention of Infectious Diseases
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초록
최근 COVID-19 팬데믹으로 인하여 많은 국가에서 감염병 예방 디지털 증명서를 위한 시스템을 도입하여 활용하고 있지만, 이에 대한 국제표준이 없어 국가 간 호환성 있는 증명서 사용의 어려움이 있다. 이에 본 논문에서는 기존 QR 코드 방식의 증명서 제출과 무선 근거리 통신 방식의 증명서 제출 방식을 비교하고 보다 개선된 무선 근거리 통신 방식의 디지털 증명서 시스템을 제안한다. 제안 시스템은 분산ID 기반의 증명서 검증 정보를 블록체인에 저장하여 국가별로 상이한 증명서의 상호 운용 체계를 구축하는 감염병 예방 디지털 증명서 시스템이다. 블록체인 기반의 신뢰앵커는 증명서 위·변조 문제를 해결하고 증명서 발행자와 제출자의 신원을 보증하여 보안성을 향상 시킬 것이다. 아울러 제안 시스템은 한 번의 증명서 제출로 다수 증명서(백신 접종증명서, 회복증명서, 검사 증명서, 신분증 등)를 일괄 검증토록 하여 이용자 편의성을 제고할 수 있을 것으로 기대한다.
Abstract
The COVID-19 pandemic has led many countries around the world to introduce and employ a digital certificate system to prevent infectious diseases, however, there are difficulties in using the compatible digital certificate between countries in that the international standards of the system have not been developed. Accordingly, we propose an improved system, comparing two methods of presenting a certificate, existing QR code-based and a short-range wireless communication-based certificates. The proposed system is a digital certificate system against the spread of infectious disease by storing verification information of the certificate using decentralized identity-based technology on the blockchain. Blockchain-based trust anchor improves security by solving the problem of forgery and alteration of certificates and guaranteeing the identity of certificate issuers and presenters. This system is also expected to enhance usability providing concurrent verification of a number of certificates(vaccination certificates, recovery certificates, test results, identity certificates, etc.) in a single certificate presentation.
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