Odd factor authentication (opens in new tab)

It wasn’t too long ago that to log into a website, you just chose some username and a password. Using both, you could log into that site and that was that. It was a rather primitive but good system. The website had no information about you, except for what you effectively anonymously posted, so data leaks were harmless. The only problem was most people used the same password and often the same username for every service, making unauthorised logins easy. The solution, to use a different combin...