CompTIA Security Plus Mock Test Q959

A recent audit has discovered that at the time of password expiration clients are able to recycle the previous credentials for authentication. Which of the following controls should be used together to prevent this from occurring? (Select TWO).

A. Password age
B. Password hashing
C. Password complexity
D. Password history
E. Password length


Correct Answer: A,D
Section: Access Control and Identity Management

Explanation:
D: Password history determines the number of previous passwords that cannot be used when a user changes his password. For example, a password history value of 5 would disallow
a user from changing his password to any of his previous 5 passwords.
A: When a user is forced to change his password due to a maximum password age period expiring, he could change his password to a previously used password. Or if a password
history value of 5 is configured, the user could change his password six times to cycle back round to his original password. This is where the minimum password age comes in. This is
the period that a password must be used for. For example, a minimum password age of 30 would determine that when a user changes his password, he must continue to use the
same password for at least 30 days.

Incorrect Answers:
B: Hashing is a one-way function that creates a fixed-length output from an input of any length.
C, E: Password complexity combined with password length helps produce strong passwords, but can be recycled if password age and history is not configured.

References:
https://technet.microsoft.com/en-us/library/cc757692%28v=ws.10%29.aspx#w2k3tr_sepol_accou_set_kuwh
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 292, 293, 315