This document describes the Caesar cipher encryption and decryption techniques. The encryption works by shifting each letter of the plaintext by a set number of positions determined by the shift key, so that 'A' shifted by 3 would become 'D'. Decryption is the reverse of this process, shifting letters in the ciphertext back by the same shift key amount to recover the original plaintext. The document provides an example of a shift key of 3 for encryption and explains that decryption undoes this process by shifting in the opposite direction.

1. Caesar Cipher
Name: Maher Al-shammari ID: 212542270

2. Encryption (technique)
 The Encryption work by shift the letter for example if you put in the plaintext letter A and
choose the shift key 3 the letter A will encryption and change to the third letter after A in
the right is D
 This example the shift key was 23

3. Decryption (technique)
 The Decryption is the reverse of encryption if you know the is 6 shift key move
the letter in ciphertext 6 letter back to the left and so one
 E for Encryption
 D for Decryption

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