The system asks the operator or TSO user to enter the correct password for input processing of a password-protected data set. The password is verified in the system's password data set. This password data set contains the data set name, the password, and a protection-mode indicator. The data set name for Version 3 or 4 generation data sets does not include the .GxxxxVyy suffix. The protection-mode indicator is set to permit either read/write or read-only operations. Processing is terminated if either of the following situations occur:

• The operator or TSO terminal user does not supply the correct password in two attempts.
• The password record for the data set to be opened does not exist in the password data set.