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Subject: Re: [imi] SAML 2 profile questions


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Displaying if a card is auditing or not is implementation specific.

The info is in the card meta-data so a selector could do it, but I  
haven't seen it done.

HoK requires a RP/STS or some special undocumented undefined browser  
magic.

I did get the GSA to agree to auditing mode cards, because of the  
dangers of not having an audience restriction.

So I appreciate the danger.

Has anyone ever looked at doing one time audiance restriction?

If the RP made up a self signed certificate per transaction or  
symmetric  signing key.

This is venturing beyond the SAML 2.0 profile.  But some of these  
issues need a broader view.

John B.
On 2009-10-14, at 5:51 PM, Scott Cantor wrote:

> John Bradley wrote on 2009-10-14:
>> Holder of key is supported in the spec for the selector.
>
> Only for non-browser, at least based on my interpretation of what is
> admittedly a muddled area.
>
>> Supporting  HoK or something equivalent with non auditing cards may
>> require a Zero Knowledge token.
>
> HoK or bearer have the same issues there, it's just about what you're
> mitigating against. It's not attempting (yet) to address OOB  
> correlation by
> the parties to find out where you went.
>
>> I think we need to continue supporting auditing and non-auditing  
>> cards.
>>
>> I have never seen auditing optional actually used,  but it might be  
>> if
>> the RP had a way to express it without a RP/STS.
>
> That's fine, but using that with bearer is just plain dangerous, and  
> people
> need to know that.
>
>> If a user could tell in the selector if a card is auditing or not it
>> would make the feature more useful.
>
> I didn't realize you couldn't, but I suppose that's implementation  
> specific.
> Nothing stops one from doing so, it knows what it's sending in the  
> RST.
>
> -- Scott
>
>
>
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