-----------------<snip>----------------------

RACF itself has practically all the functionality built-in that you are
looking for.
If I remember correctly, - RACF Configuration options allow the retention of (x) previous passwords
within the RACF database.
- password syntax options (length, valid characters, repeat strings, etc.)
- a password validation exit that allows you to perform additional checks
above and beyond those provided by RACF

Once the rules (and/or exit) have been set up, a user who changes the
password will not be able to create a new password that violates these
rules. No need for a homegrown application ...
---------------------<unsnip>----------------------
This is quite correct. If more restrictive password rules are desired, you can also write a password validation exit, wherein you can impose any other rules you like. Look in the RACF System Programmers Guide for more information.

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