Black Unicorn:

...

Does there currently exist a system which permits webservers to restrict access to clients who have a given certification?

Sameer:

Yup. .... =) Stronghold: The Apache-SSL-US, coupled with XCert Sentry. What else?

Of course, there's a simpler approach; restrict access to people who have logins and passwords, and only give those to people who have the certification... # Thanks; Bill # Bill Stewart +1-415-442-2215 stewarts@ix.netcom.com # http://www.idiom.com/~wcs # Rescind Authority!