KICA (Korea Information Certificate Authority, 한국정보인증) is a South Korean company specializing in digital authentication, electronic certification, and electronic contract services. The company operates as a licensed certificate authority, providing infrastructure and services that enable organizations to transition from paper-based workflows to fully digital processes. KICA's core service offerings include three main areas. First, authentication services (인증 서비스), which encompass non-face-to-face joint certificate (공동인증서) issuance — the Korean equivalent of a national digital identity certificate used for online transactions and government services. Second, certification/proof services (증명 서비스), operating under the "MedCerti" (메드서티) brand, which facilitate the issuance and management of electronic certificates and official documents. Third, electronic contract services (전자계약 서비스), offered under the "SignOK" (싸인오케이) brand, which digitize the entire lifecycle of contract creation, signing, delivery, and storage. The company holds an AA credit rating and reports total assets of approximately 232.6 billion KRW and annual revenue of approximately 81 billion KRW, with a workforce of 222 employees. KICA serves both private sector clients — including platforms such as rental car services — and public sector entities, as evidenced by its presence on public solution marketplaces. KICA also emphasizes environmental sustainability, claiming its services save an average of 20 million sheets of paper annually, reducing carbon emissions by approximately 100 tons per year. The company is headquartered in Seongnam, Gyeonggi-do, South Korea.