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Suppose that you have received the following encrypted message from your friend, ciphertext = ccbvrgu. He told you that the original message was first encrypted
Suppose that you have received the following encrypted message from your friend, ciphertext = ccbvrgu. He told you that the original message was first encrypted using the Caesar cipher with k=3 and then was re-encrypted using the Vigenere cipher with k= old. Your task is to find the original message (i.e. plaintext). (5 Marks, show all steps in detail)
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