On 5-Jun-06, at 2:42 PM, Eric Rescorla wrote:


I'm still not sure I get what you're saying. Let me see if I can
try again looking at the flows of data.


OPTION 1: What I take DIX to be doing

Yes, this interaction diagram is correct.

Client                     IdP                   Relying Party

-------------------------  Service Please ------------>
<------------------------- Prove you're over 21--------

<-------Auth exchange ------>
<------- Over 21 credential--

<----------------- Auth exchange plus over 21 cred ---->

Assuming that at some point earlier the user acquired an over 21 assertion
from an appropriate authority.

Client            Identity Agent                   Authority

-------------------------  Service Please ------------>
<--- Auth/Verify exchange, maybe even out of band ---->
<------- Over 21 credential----------------------------
<--------- Over 21 cred ---->

John



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