Holder of Key and Sender Vouches subject confirmation

[Peter Schober]

* Cantor, Scott <cantor.2 at osu.edu> [2014-03-27 16:28]:
> No, that's the required method for SSO. The IdP doesn't support adding
> additional confirmations except in the specific case of the delegation
> extension.

Maybe the (broken) link to GridShib should be removed then, which claims
to "[enable] the IdP to issue Holder-of-Key SAML assertions":
https://wiki.shibboleth.net/confluence/display/SHIB2/Contributions
-peter