Yes please. Plus, I've been integrating this everywhere and it takes all of five minutes (which is two hours less than traditional account workflows).

Please use Persona, it's this idea but much more thoroughly thought out and tested.

Here is a great video about it: https://www.youtube.com/watch?v=nJff23UdNAI

If you have not heard of Persona, or have heard of it but don't see what the big deal is / why it's different to "Login with google", "Login with twitter" etc, then go watch this video. It is a very elegant, decentralised solution to the login problem.

The "How it works" page gives exactly zero information about how it works.

This is more informative:

https://developer.mozilla.org/en-US/Persona/Protocol_Overvie...

I wrote one up when I implemented Persona for my blog:

http://www.b-list.org/weblog/2013/sep/05/persona/

Persona is great! I'd like to see something like it that can also be used in native apps.