This page is a cyber punching bag. But punching it is a crime. You are not allowed to try to hack into this website. Check out the Wikipedia page about
Pointers in the C language have tortured a few generations of programmers by now. But they are also one of the most useful, powerful, and important parts of the language.
SHA-1 has been widely disparaged for security reasons, but it is just fine for checking file integrity. But like all things in computer science, when the files get really large