Create a general encryption and decryption functions for the permutation cipher. Create a Mathematica notebook that solves and discusses the solution, include the text so that the document is readable.

Can anyone help me with this please? it should be in Mathematica notebook. Thank you!!

1.6 If an encryption function eK is identical to the decryption function dx, then the key K' is said to be an involutory key. Find all the involutory keys in the Shift Cipher over 226