[T]hey likely won't see your pattern. is the weakness in this system. There are bad web sites that still do not encrypt your password, in which case a hacker wi

[T]hey likely won't see your pattern. is the weakness in this system. There are bad web sites that still do not encrypt your password, in which case a hacker will see your pattern. There are many web sites that use poor encryption practices in which case a hacker can brute force decrypt your password and see the pattern. Once an attacker guesses your pattern, it is game over.