I agree with the author that passwords are poor solution from usability and security standpoint, and the reason they are used is because of easy implementation.

I agree with the author that passwords are poor solution from usability and security standpoint, and the reason they are used is because of easy implementation. Having to make a password is not a pleasant user experience. You type a password you used for another site only to get a message saying that you need to add digits and symbols. So annoying. Now you have to remember two passwords. And if you try to follow the best security practices, everything becomes even more difficult. For example, it is recommended to use different passwords for different sites. But can an average human remember 20, 50 or 100 different passwords? Unlikely. So instead users simply use same or similar passwords and save them in a browser. Which means, once their computer gets hacked or stolen all their passwords are leaked. And even if a user doesn't save passwords, they can be stolen with a keylogger. Passwords can also be bruteforced or leaked when the server is hacked. Here in Russia banks always require a SMS confirmation to login - which means that passwords are not considered secure by them. Author suggests to use key files instead. They offer slightly better security if protected with a password, but still can be stolen by a malware and still have inconvenience of dealing with passwords. In legacy OS like Windows or Linux every application has access to all user files, so any of them could steal your keys. Therefore I think that the solution to both usability and security issues would be a physical key. It could be optionally protected with a PIN code. Imagine how easy it would be to login or register - you simply insert the key into a lock and press a button. It is better than passwords or key files in every aspect.