Question: (10 points) Please evaluate the computation complexities of the following attacks. a) Suppose a company uses AES-256 algorithm to encrypt messages. If the attacker has

(10 points) Please evaluate the computation complexities of the following attacks.

(10 points) Please evaluate the computation complexities of the following attacks. a) Suppose a company uses AES-256 algorithm to encrypt messages. If the attacker has obtained a message M and its and cipher text C, and has decided to perform brute force attack to find out the encryption key K, what is the computation complexity? Please justify your answer. b) Suppose a company uses 3DES algorithm to encrypt messages. If the attacker has obtained a message M and its and cipher text C, and has decided to perform brute force attack to find out the encryption key K, what is the computation complexity? Please justify your

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