A company wants to bolster its defenses against an attack that involves attempting a list of potential passwords. Which of the following measures would BEST mitigate this specific type of attack?
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Increase the frequency of data backups.
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Restrict user login times to business hours only.
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Enforce a strong password policy that requires complexity.
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Install and update antivirus software on all systems.
Implementing a strong password policy that requires complex passwords, which typically include a mix of uppercase letters, lowercase letters, numbers, and special characters, can greatly reduce the effectiveness of a dictionary attack. These attacks rely on trying common words and simple password variations, so complexity directly counters this method. The other options—increasing the frequency of backups, installing antivirus software, and limiting login times—may improve security in other areas but do not directly address the vulnerability exploited by a dictionary attack.
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