Question: POLYALPHABETIC CIPHER The polyalphabetic cipher that alternates the uses of the ciphers y = 23x + 3 (mod 26), y = 9x + 21 (mod

POLYALPHABETIC CIPHER The polyalphabetic cipher that alternates the uses of the ciphers y = 23x + 3 (mod 26), y = 9x + 21 (mod 26), y = 21x + 12 (mod 26), and y = 7x + 4 (mod 26) was used to produce the following ciphertext: YLUHIRQADIXHISSGITZZEFXRFISHJBYJ Find the message. Write the number in the message using Roman numerals. Encode the answer to the previous step using the same polyalphabetic cipher that was used to encode the original message

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