> -----Original Message-----
> From: oauth-boun...@ietf.org [mailto:oauth-boun...@ietf.org] On Behalf
> Of Brian Campbell
> Sent: Tuesday, March 29, 2011 3:32 PM
> To: oauth
> Subject: [OAUTH-WG] Question on scope when refreshing an access token
> 
> I'm a bit confused by the text at the end of the definition of the scope
> parameter in section 6 on Refreshing an Access Token[1].  It says,
> 
>         "...  The requested scope MUST be equal or lesser
>          than the scope originally granted by the resource owner, and if
>          omitted is treated as equal to the previously approved scope."
> 
> In particular, what is the 'previously approved scope'?  Is it the same as the
> originally granted scope?  Or is it the most recent scope successfully
> requested when refreshing? If the latter, does this imply that an AS
> implementation must store both the original scope and the previously
> requested scope? Or is it something else?
> 
> Perhaps a better question is what is the use case behind this text?  I assume
> it's some kind of down-scoping (& I apologize if this has been discussed
> before and I missed it) but the intent isn't clear to me nor is it clear what
> exactly is required by the spec.

Yep, just down-scoping. It is there to make sure that whatever the resource 
owner approved is always the most permissive scope granted. Do I need to make 
it clearer?

EHL
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