(1) In the Kerberos protocol, a file that contains service principal names and secret keys. The secret keys should be known only to the services that use the key table file and to the key distribution center (KDC).
(2) A file on the service's host system. Each entry in the file contains the service principal's name and secret key. On i5/OS, a key table file is created during configuration of network authentication service. When a service requests authentication to i5/OS with Network Authentication Service configured, that i5/OS checks the key table file for that service's credentials.