Question: It a key is 43 bits longer how much longer will it take to crack it by exhaustive search if it is extended to 45

It a key is 43 bits longer how much longer will it take to crack it by exhaustive search if it is extended to 45 bits? 2^1 = 2 1^2 = 1 2^2 = 4 (45 + 43) 2^2=8

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