Question: A password hash function is applied 12 times to secure a password. If it takes 21 minutes to brute force one application of the hash

A password hash function is applied 12 times to secure a password. If it takes 21 minutes to brute force one application of the hash with the available resources, how long will it take to brute force the password if the available resources are quadrupled.

21 minutes

63 minutes

210 minutes

none of the above.

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