What is the minimum length for a keystore encryption passphrase?

• A. Passphrase must be at least 8 characters
• B. Passphrase must be exactly 8 characters
• C. Passphrase must be at least 12 characters
• D. No minimum length requirement

Answer: (A)

The idea being tested is the minimum length required to make a keystore encryption passphrase adequately resistant to guessing. Requiring a minimum length helps ensure there’s enough entropy in the passphrase so brute-force attempts take longer. In this context, eight characters is the baseline that the policy enforces: the passphrase must be at least eight characters long, but can be longer for enhanced security. It isn’t about forcing an exact length, and it isn’t requiring a longer minimum like twelve, nor does it say there’s no minimum at all. So the correct stance is that the passphrase must be at least eight characters long.