The so-called CA(Certificate Authority) certification center is an authoritative and impartial third-party trust institution that uses PKI(Public Key Infrastructure) technology to provide network identity authentication services, is responsible for the issuance and management of digital certificates, and acts as a certificate issuing company in our real life, such as passport handling institutions. At present, domestic CA certification centers are mainly divided into regional CA certification centers and industry CA certification centers. Hebei e-commerce certification co., ltd is a regional certification body approved by the people's government of Hebei province.