MySQL Server supports a keyring that enables internal server components and plugins to securely store sensitive information for later retrieval. See The MySQL Keyring.
As of MySQL 8.0.16, the
keyring_keys table exposes
metadata for keys in the keyring. Key metadata includes key
IDs, key owners, and backend key IDs. The
keyring_keys table does
not expose any sensitive keyring data
such as key contents.
keyring_keys table has these
The key identifier.
The owner of the key.
The ID used for the key by the keyring backend.
keyring_keys table has no
TRUNCATE TABLE is not permitted