So Richard - what are you going to do when you get sued for building a product that has NO possible use but to violate filed and reliable Intellectual Property Rights - This is not just my claim - the original RFC now has a section that talks to its issues with commercially supplied patents regarding receipt generation and the use of time data therein. Only it doesn't bother to include the XML ones or those filed and granted since the Haber ones it does reference became moot.
This is the real issue with RFC3161 and its becoming a standard. It essentially creates the first COMMERCIAL standard inside the IETF since there can be no use model that is not in violation of any number of patents. It also will IMHO constrain PKIX for what it is - an old boys club masquerading as a standards group.
I see the ascension of 3161 as one of the saddest things that can happen since it will permanently impugn PKIX and in fact may be the key item necessary to force the deconstruction of the IETF as we know it today.
Todd Glassey