WoSign CA Limited, also known as WoTrus, is a reputable electronic certification service provider established in 2002 in Shenzhen, China. It is licensed by the Ministry of Industry and Information Technology and recognized as an international certificate authority (CA). WoTrus specializes in offering authoritative third-party digital identity authentication services based on Public Key Infrastructure (PKI) technology.

Their extensive product portfolio includes SSL certificates, code signing certificates, PDF signing certificates, and client certificates, all designed to enhance online security and trust in various applications. WoTrus also provides unique domestic cryptographic certificates that comply with national security standards. In addition to digital certificates, they deliver comprehensive solutions such as timestamp services, electronic signature systems, and various PKI applications tailored to meet the security needs of diverse sectors, including government, finance, education, and healthcare.

With a commitment to innovation and user-centric service, WoTrus aims to make the internet a safer and more trustworthy space for all users.