This machine was basically the first computer. For those who did not know, Alan Turing, during the Second World War, devised a machine which made it possible to decrypt Enigma code in relatively short time and therefore gain a significant advantage. I have always been fascinated by encryption and cryptosystems. Here is the algorithm carefully described.
If you want to get more on RSA click here. In order to decrypt a message encrypted with RSA you would need to factorize a REALLY BIG number and this problem may take a very long time to be solved, it may take so long that it becomes unpractical to be achieved. As you may recall from high school, each number has a unique prime number factorization. It basically rely on the also well-known issue of factoring big numbers. RSA is a well-known cryptosystem used in many cases where secure data transmission is needed. Please before continue reading, make sure to read the disclaimer at the bottom of this article.