QuestionQ445

Vulnerability Management

John is a professional Ethical Hacker assigned to test the security of www.we-are-secure.com. He successfully carries out a brute-force attack on the We-are-secure server. He now recommends countermeasures to prevent such brute-force attacks on that server. Which of the following are countermeasures against a brute-force attack?

Each correct answer represents a complete solution. Choose all that apply.

Choose two
  • A The site should restrict the number of login attempts to only three times.
  • B The site should increase the encryption key length of the password.
  • C The site should use CAPTCHA after a specific number of failed login attempts.
  • D The site should force its users to change their passwords from time to time.
Explanation

Restricting the number of failed login attempts limits an attacker’s opportunities to guess credentials, typically by locking or throttling the account. Presenting a CAPTCHA after repeated failed attempts adds a human-verification barrier that impedes automated password-guessing tools.

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