Question 3 The definition of a Shift Cipher can be expressed as follows:Def. Let x, y, k ∈ Z26 with the encryption operation as ek(x) ≡ x + k mod 26 and the decryption operation as dk(y) ≡ y - k mod...

Question 3

The definition of a Shift Cipher can be expressed as follows:
Def. Let x, y, k ∈ Z26 with the encryption operation as ek(x) ≡ x + k mod 26 and the decryption operation as dk(y) ≡ y - k mod 26.
Given the provided letter encoding, what would be the encoding of the plaintext word ATTACK after applying a shift cipher with a k=17?

Extracted text: A B F M 4 4 7 8 9 10 11 N Q U w Y 13 14 15 16 17 18 19 20 21 22 23 24 | 25 K. G, R. 3. 2. P.