Please implement the Simplified DES-Algorithm The implementation must be performed using C (neither C++ nor any other language). 2. After implementation you must test this algorithm. For this purpose you have to develop a test concept including at least two major parts to be tested. The test must be performed. 3. The implementation shall be used for a brute-force-attack to de-cipher an unknown text with an unknown key. As the key inside S-DES is only 10 bit long, there are only 1024 possibilities, but the decision which key is the most likely one is not easy as long as you dont know the used language. Find at least one criteria how to decide whether a key is a candidate or not, and test this for usability.