Question: Please dont answer after 09/26. Thank you a. Solve: 7d1 (mod 30) b. Suppose your plaintext message is represented as a number: m (mod 31).

Please dont answer after 09/26. Thank you

a. Solve: 7d1 (mod 30) b. Suppose your plaintext message is represented as a number: m (mod 31). Suppose your encryption function is: c-E(m)-m (mod 31). How would you decrypt the ciphertext c? (Hint: Decryption will involve raising the ciphertext c to some power mod 31.) 2. a. b. Find all solutions (if any exist) to: 12x Find all solutions (if any exist) to: 12x 28 (mod 236). 30 (mod 236)

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