Hello everyone, I am new to site, and also a n00b myself. I am studying network security at the moment and trying to learn more about cryptography. Thus I am doing a paper on cryptography about block ciphers. I am still trying to really understand them so I was wondering if anyone had any examples of a very simple block cipher like 4-bit. That I could attempt to crack, also if you could provide a solution to check myself that would be great. But I would like to show an example in my paper. Hope someone can help! Thanks!!