If passwords are stored, then they can be stolen. But how do you allow people to log in, if you don't store their password? This video introduces security principles such as hashing, while giving an intuition as to why they are important. Ultimately, answering why Google, or any web application, should not know the password you use to log in.

00:00 - Oh No, My Password!
00:48 - The Wrong Way to Handle Passwords
02:04 - Security on the Internet
04:26 - The Problem
05:44 - Leading Us To The Solution
07:58 - The Solution
10:28 - You're A Security Expert (?)