Most of Korean governmental websites require a special log in, which uses certificates such as Kakao, Naver or 공동인증서 Digital Certificate.

f you live in Korea for a long time, you know that certificates are often used in Korea, for log in purposes or for payment authorization.

공동인증서(구 공인인증서) is a certificate and it means a digital signature that serves as a signature or seal which belongs to a specific person only.