Password Authentication

password is a way of proving that you are who you say you are. One of the oldest forms of attack was something called brute forcing, which was repeated attempts at logging in a somebody using a different password every time. If trying to authenticate as a user and you don't have their password, you have to start looking at how you can can get their password or make up their password. It's about two point six billion guesses you have to have to cover the full state space of how many passwords you could have.