RA is the certificate registration and approval system. This system has a series of functions such as certificate application, approval, download, OCSP, LDAP, etc., and provides electronic certification services for the entire institutional system.

As a part of the CA certification system, RA can directly inherit the legitimacy of CA certification from the CA provider. It enables customers to issue certificates in their own names, making it easier for customers to carry out work.

Digital Certificate Registration Center, also called RA, is an extension of the certificate issuance and management of the Digital Certificate Certification Center. Mainly responsible for information entry, review and certificate issuance of certificate applicants. At the same time, complete corresponding management functions for issued certificates. The issued digital certificate can be stored in media such as IC card, hard disk or floppy disk. The RA system is an indispensable part of the normal operation of the entire CA center.