Question: A cipher uses a 6 4 - bit - long key. What is the time required to find the key for a brute - force

A cipher uses a 64-bit-long key. What is the time required to find the key for a brute-force attacker capable of performing 1014decryptions/sec? Presenting the formula is necessary.a.What is the time required in the worst case? (10 points)b.What is the time required on average? (10 points)

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