When exactly is data exchange with the certification authority carried out during system operation?

Data exchange with the Certification Authority (CA) during the system operation usually occurs in the following cases:

• During initial registration or certificate issuance — the system sends a request to obtain a certificate.
• When verifying the validity of a certificate — for example, through requests to OCSP (Online Certificate Status Protocol) or CRL (Certificate Revocation List).
• When updating or revoking a certificate — if the system needs to update the certificate status information.

In the context of Golang, this can be implemented through HTTP requests to the CA server at appropriate moments, such as during TLS connection establishment or periodic certificate status checks.

Thus, the interaction with the Certification Authority does not happen constantly but at key moments related to certificate management and verification to ensure security.