#### 27.12.18.2 The keyring\_keys table

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 MySQL Server supports a keyring that enables internal server components and plugins to securely store sensitive information for later retrieval. See [Section 6.4.4, “The MySQL Keyring”](keyring.html).

 As of MySQL 8.0.16, the [`keyring_keys`](performance-schema-keyring-keys-table.html) table exposes metadata for keys in the keyring. Key metadata includes key IDs, key owners, and backend key IDs. The [`keyring_keys`](performance-schema-keyring-keys-table.html) table does *not* expose any sensitive keyring data such as key contents.

 The [`keyring_keys`](performance-schema-keyring-keys-table.html) table has these columns:

* `KEY_ID`

   The key identifier.

* `KEY_OWNER`

   The owner of the key.

* `BACKEND_KEY_ID`

   The ID used for the key by the keyring backend.

 The [`keyring_keys`](performance-schema-keyring-keys-table.html) table has no indexes.

[`TRUNCATE TABLE`](truncate-table.html) is not permitted for the [`keyring_keys`](performance-schema-keyring-keys-table.html) table.

