5.3 Decryption algorithm
Step 1: Multiply last 5 digits of the ciphertext by the Key
Step 2: Add first 3 digits of the ciphertext with the result produced
in the previous step
Step 3: If the result produced in the previous step i.e. step 2 is not
an 8-bit number we need to make it an 8- bit number
Step 4: Reverse the number to get the original text i.e. the plain
text