[IPP] [PWG5100.19] Issue #57: Add section describing IPP interaction with different HTTP authentication systems (Basic, Digest, OAuth2, Certificate, etc.)

[smith.kennedy at hp.com]

[Issue Unconfirmed]

It would be useful to have sequence diagrams and other descriptions of the
user and client interactions expected with the different HTTP
authentication mechanisms that might be employed in IPP infrastructures.
This document lacks that.

Link: http://www.pwg.org/issues/57