Character Position Difference for Passwords (QPWDPOSDIF)

The Character Position Difference for Passwords (QPWDPOSDIF) system value controls each position in a new password.

This system value provides additional security by preventing users from using the same character (alphabetic or numeric) in a position corresponding to the same position in the previous password.

When the password level (QPWDLVL) system value has a value of 2 or 3, the test for the same character is case sensitive. This means that a lowercase 'a' is not the same as an uppercase 'A'.

Notes:
  1. This system value is a restricted value. See Security system values for details on how to restrict changes to security system values and a complete list of the restricted system values.
  2. If the QPWDRULES system value specifies any value other than *PWDSYSVAL, this system value cannot be changed and its value will be ignored when new passwords are checked to see if they are formed correctly.
Table 1. Possible values for the QPWDPOSDIF system value:
0 The same characters can be used in a position corresponding to the same position in the previous password.
1 The same character cannot be used in a position corresponding to the same position in the previous password.