"Recently, browsers have just begun to implement web cryptography. This means that browsers are now capable of the same kind of passwordless decentralized authentication schemes we've had server-side with ssh and tls asymmetric keys for decades.

Imagine if you could just generate a key and sign messages with that key, proving your identity to other users and backend services without the need for a password or even creating an account with yet another web server! We can have the ease of use of signing in with twitter or facebook without any centralized servers and very minimal setup from the end user's perspective.

Even better, this authentication system can work offline. In fact, the system must work offline to be fully secure."

http://substack.net/offline_decentralized_single_sign_on_in_the_browser

Brzmi jak ciekawa koncepcja, co myślicie?