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To combat against a Brute force attack, which of the following is best suited for maximum safety?
Password recovery
Minimal Password expiration time
Password complexity
Account lockout
Online yes. But DoS may be resulted. Offline cracking, no. Recommend to modify the wording. |@Ajay. Will minimal password expiration time be a better suited. As the password would have to been changed regularly. So even brute force if has solved the first two-three characters of the password, it would be incorrect again as soon as the password was changed.
To crack an online password, you cannot approach 1/2 of 1% of the attempt rate used in the theoretical brute force examples you use. If it would take a fast array of machines several hours to crack, it would take years online. By then the target would more than likely have moved. https://nakedsecurity.sophos.com/2013/08/16/anatomy-of-a-brute-force-attack-how-important-is-password-complexity/ ****WRONG CONCEPT AND ANSWER****
Changing Answer to Account Lockout, however complex the password may be, if you don't lock the account after unsuccessful access attempts, there is a chance of cracking the password. For "maximum safety", account lock should be the best answer among the choices.
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