<html><head></head><body><h2>Secret algorithm (KPTA 2).</h2>
<br>
<h3>Description:</h3>
This encryption method is based on using an algorithm that doesn't require a key. 
The strength of this cryptosystem resides with the secrecy of the algorithm, not with the key.<br><br>
That is a bad practise because once you know the method you can decrypt any text you want.<br>
Your aim is to analyse some texts with their corresponding cipher texts and determine the algorithm.
Once you know the algorithm decrypt the fi