[viraptor]

UI is just an implementation part. If the main point was to improve on the user interaction side, I missed it completely. Only things he provided were an idea roughly equivalent to the existing one and a shell script which needs to be run outside of the browser. It's hardly better than "pick one entry from the dialog box", however ugly that dialog box is.

[udoprog]

No, the main point is to show how simple client verification actually is. This implementation is one step up on the application stack into a comfort zone which seems to be more acceptable by devs.

I believe in design in depth, and by allowing the most basic of techniques (form submission + cli tool stack) to handle something that is generally perceived as difficult and letting people "get" the manual process, the automation might not seem as daunting.

I did not intend to create a standard, just to provoke more discussion. I would however by gladly surprised if I woke up tomorrow and twitter allowed me to sign in by solving a challenge instead of a password : ).