The original seed never turns up again until every other number has come up. The algorithm processes the seed and gets a new number with no traceable connection to the old, and the new number becomes the next seed. This algorithm starts with a number called a seed. “Password managers and other computer programs use what's called a pseudo-random algorithm.

All results seem randomized, but they actually aren’t. Computers can’t actually be random-they need a seed number to kickstart the algorithm. Why are password generators only pseudo-random? Because they use algorithms. Secure password generators, like those connected to password managers, use cryptographically secure pseudo-random number generators or have offline functionality so that you can generate passwords to your heart's content without the risk of anyone sneaking a look through your Internet connection. So when it comes to the question of using any old online password generator, our immediate gut reaction is a resounding “NO!”

However, not all password generators are secure. None of us should reuse passwords, and what we tend to come up with off the top of our heads isn’t as hack-proof as we’d like to think. Password generators are a fantastic tool.

Lastpass generator