Alternate identification for an account is assigned when an account is created, copied, or modified. The identification is typically an ASCII string provided by an alternate identification source, such as a card reader. This identification can only be supplied by a user with special privileges. After the alternate identification property for an account has been assigned, it can then be used to perform a logon sequence in lieu of a username/password combination.
To ensure that there are no conflicts, alternate identification properties for all accounts in a VTS application must be unique.