Question

What are the three ways to decipher a message encrypted with a key-based cipher?

a.

Obtain the key, try all possible combinations, look for a flaw in the algorithm

b.

Obtain the algorithm, try all possible combinations, look for a flaw in the key

c.

Obtain the message, try all possible keys, look for a flaw in the algorithm

d.

Obtain the message, try all possible keys, look for a flaw in the key

Posted under Reverse Engineering

Answer: (a).Obtain the key, try all possible combinations, look for a flaw in the algorithm Explanation:In order to decipher a message encrypted with a key-based cipher, you would have to either: obtain the key, try all possible combinations until you get to the key, look for a flaw in the algorithm.

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