Find a key for the affine linear cipher with alphabet \{A, B, C... | Filo

Identity V: How To Decode A Cipher

What Is A Cipher? A Complete Overview

3 Ways to Encode and Decode Using the Vigènere Cipher - wikiHow

A generalization of the Caesar cipher, known as the affine Caesar cipher, has the following form: For each plaintext letter p, substitute the ciphertext letter C : C=E([a, b], p)=(a p b) 26 A basic requirement of any encryption algorithm is that it be one-to-one. That is, if p ≠q, then E(k, p) ≠E(k, q). Otherwise, decryption is impossible, because more than one plaintext character maps into the same ciphertext character. The affine Caesar cipher is not one-to-one for all values of a. For example