[PCI DSS 3.0] [PCI DSS 3.0] 8.2.5 Do not allow an individual to submit a new password/phrase that is the same as any of the last

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8.2.5 Do not allow an individual to submit a new password/phrase that is the same as any of the last four passwords/phrases he or she has used.

8.2.5.a For a sample of system components, obtain and inspect system configuration settings to verify that password parameters are set to require that new passwords cannot be the same as the four previously used passwords.

8.2.5.b Additional testing procedure for service providers: Review internal processes and customer/user documentation to verify that new non-consumer user passwords cannot be the same as the previous four passwords.

If password history isn’t maintained, the effectiveness of changing passwords is reduced, as previous passwords can be reused over and over. Requiring that passwords cannot be reused for a period of time reduces the likelihood that passwords that have been guessed or brute-forced will be used in the future.
 
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