Question: Consider five-character passwords that are selected from among the 52 lowercase and uppercase letters of the alphabet. This question is about how a system reveals

Consider five-character passwords that are selected from among the 52 lowercase and uppercase letters of the alphabet. This question is about how a system reveals whether a password is correct or incorrect.

* If the system only reveals whether the entire password is right or wrong, how many guesses would it take on average for an adversary to guess a random password?

* If the system gives feedback after each character of the password, indicating whether that character is correct, now how many guesses would it take?

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