Question

In a brute-force attack, on average, half of all possible keys must be tried to achieve success. If the 56-bit key size is used with the DES (Data Encryption Standard) algorithm and 1 micro second is needed to perform a single decryption. How much time would it take to get a success?
(1) 1142 years
(2) 10.01 hours
(3) 2.15 milliseconds
(4) 5 day

Answer 1

5 days is a answer for this question