Specifies when a password can be used again. (QPWDRQDDIF)
Password reuse cycle, also known as QPWDRQDDIF, is a member of the password category of i5/OS™ system values. You can use this system value to specify when a password can be used again. To learn more, keep reading.
| Quick reference | |
|---|---|
| Location | In iSeries™ Navigator, select your system, |
| Special authority | All object (*ALLOBJ) and security administrator (*SECADM) |
| Default value | After 1 password |
| Changes take effect | Immediately |
| Lockable | Yes Lock function of security-related system values  (Click for details) |
What can I do with this system value?
You may specify how many of the previous passwords are checked for a duplicate password. This option provides additional security by preventing users from specifying passwords they have used previously. This option also prevents a user whose password has expired from changing it and then immediately changing it back to the old password.
The following are possible values:
- After 1 password (0)
- After 4 password (8)
- After 6 password (7)
- After 8 password (6)
- After 10 password (5)
- After 12 password (4)
- After 18 password (3)
- After 24 password (2)
- After 32 password (1)
The suggested setting is after 10 passwords (5). Select a value of 10 or more to prevent the use of repeated passwords. It is recommended to use a combination of the Password expiration value and the Password reuse cycle value to prevent a password from being reused for at least 6 months. For example, select 30 days for Password Expiration (days after last change) and After 10 passwords for Password re-use cycle. This means a typical user, who changes passwords when warned by the system, will not repeat a password for approximately 9 months.
Where can I get more information about this system value?
To learn more, go to the password system values overview topic. If you are looking for a specific system value or category of system values, try using the i5/OS system value finder.