NTP authentication uses a key and a shared secret to verify the identity of the NTP server sending timing information to the SCC. RiOS encrypts the shared secret text using MD5 or SHA1, and uses the authentication key to access the secret.

NTP keys appear in a list that includes the key ID, type, secret (displays as the MD5 or SHA1 hash value), and whether RiOS trusts the key for authentication.

You can only remove a key from the trust list using the CLI command ntp authentication trusted keys. For details, see the Riverbed Command-Line Interface Reference Manual.