This parameter specifies the name of the userid-password plug-in library to be used for client-side authentication and local authorization.
By default, the value is null and the DB2 supplied userid-password plug-in library is used. The plug-in is used when the client is authenticated using CLIENT authentication, or when local authorization is performed and the authentication type in the DBM CFG is CLIENT, SERVER, SERVER_ENCRYPT or DATA_ENCRYPT. For non-root installations, if the DB2 userid and password plug-in library is used, the db2rfe command must be run before using your DB2® product.