You have found two plaintext-ciphertext pairs which you know are from an affine
cipher based on the English alphabet. The pairs are (1,7) and (0,2).
(a) Find the equation of the cipher.
2 marks
(b) Use Maple and the resultant affine cipher to encrypt the sentence “My
student ID is xxx, and I am now working on Assignment 1a”, and verify the
result is correct by decryption (replace “xxx” with your real student ID, delete
the blank and punctuation, and capital and lower-case letter are the same).
2 marks