Guys, identity systems for the web are off-topic for this list. Other than the anonymous passports/SINs/fidelity bond ideas, Bitcoin doesn't have any relevance to it.

On Sat, Nov 2, 2013 at 2:19 PM, Hannu Kotipalo <hannu.kotipalo@iki.fi> wrote:

Maybe this is a bit off-topic, but the *real* answer to the question
"why-is-nobody-using-ssl-client-certificates" is that it would force
www pages to be encrypted and would make it a lot more difficult for
NSA to log www-trafic.

No, it wouldn't. You can log a user in using SSL and then redirect the user back to an encrypted page, using cookies for the rest of the session. Please don't clutter up this list with conspiracy theories. The brutal reality is that identity is a hard problem.