שאלה | Bob and Alice use a shared secret key ? K (256 bits) to encrypt messages. Alice sends Bob an encrypted message using an algorithm where each character in the message is individually encrypted using AES. Is this encryption protocol secure against a brute-force attack to find the key?

Bob and Alice use a shared secret key ? K (256 bits) to encrypt messages. Alice sends Bob an encrypted message using an algorithm where each character in the message is individually encrypted using AES. Is this encryption protocol secure against a brute-force attack to find the key?

		Yes, it is secure because the key is 256 bits long, making brute-force attacks computationally infeasible.
		No, it is not secure because 256-bit keys can be easily brute-forced
		Yes, it is secure because AES is unbreakable
		No, it is not secure because individual character encryption is weak