Part of macOS
ocspdCertificate checks
○ Leave it
Checks that security certificates haven’t been revoked.
What it is
Asks certificate authorities whether certificates are still valid.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
ocspdtrustdFileHelpertrustevaluationagent
From Procession’s guide, in the words the app shows.