Yes, but 99.999% of web servers don't need client certs.

marcosdumay · on June 30, 2015

Of course. But they'll end up implementing it anyway, because of the 00.001%.

Tepix · on June 30, 2015

Source?

Natsu · on June 30, 2015

Other than the government, nobody trying to do client certs actually runs the CA that issues them that I've seen. Instead, they trust some random set of commercial CAs, ignorant of the fact that openssl s_client -connect will dump out that list to any passer-by. I've even seen them trusting the "domain control validated only" certs, without any indication of "maybe this is a bad idea, because anyone who can buy a cert can auth to us because we don't even check."

So for every case I've seen, they'd have been ahead to issue credentials themselves and just skip client certs.

tedunangst · on June 30, 2015

99.999% of web servers.

aaronbrethorst · on June 30, 2015

I think cperciva's opinion is a sufficiently valid source on this sort of issue, which is probably why you're being down voted.

cperciva · on June 30, 2015

Thank you for the vote of confidence, but you're wrong. The question of "real world usage of TLS" is one where I would immediately defer to tptacek without question... and you've been around long enough to know that's something I don't do very often.