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7. (2 pts) What is the maximum number of guesses it would take to find a DES key by brute force? 8. (8 pts) Use

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7. (2 pts) What is the maximum number of guesses it would take to find a DES key by brute force? 8. (8 pts) Use S-DES to encrypt the plaintext block m = 00011010 using the key K= 1011000101. Show your work, labeling the result after each step and circling the final ciphertext c

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