Question: If a message is encrypted using AES with a key length of 2 5 6 bits, the brute force approach to decryption involves generating each

If a message is encrypted using AES with a key length of 256 bits, the brute force approach to decryption involves generating each of the 2256 possible keys in turn until one is found that decodes the encrypted message. Quantumcomputing was discussed in Chapter 5. Using a quantum computer, how many qubits are required to represent all 2256 possible keys simultaneously?

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