In short. I make some considerations about what kind of info ends up in a claim, and the things we expect will happen when those info are processed. I then make a case for thinking about claims in terms of attribute claims and authorization claims. The user centered identity people are an interesting crowd. Somebody comes from the world of classic federation, enterprises, directories and the like; some other comes from the world of websites and interaction in general. A funny thing I observed is that often the very same element gets interpreted in very different ways, and the interpretation given is so natural and implicit to each camp that it is difficult to understand from where the confusion comes from (or even to realize that there is confusion to begin with). If you are one of the AI winter survivors, that would be Minsky's frames. One of such things happen to be the concept of claim . Yes, we all know that a claim is a declaration about a subject made by an entity; but what is the first example that comes to your mind? Let me play psychic: if you thought "group" or "role" you are a FED (federation, enterprise, directory) kind of guy; if you thought "birthdate", "name", "nationality" you are likely coming from the web/interactive angle (I'll call you WI). If you thought "PPID" you are probably sick, you go around with long curly hair and you have a severe case of underbite. So if you are talking to a FED and a WI and you say the sentence "The RP will process the claim" without Read More...