What makes this so much different from Basic? Instead of using a flow the 
browser simply asks the user for a set of credentials. Once it has a set, it 
reuses it based on realm.

EHL

> -----Original Message-----
> From: Brian Eaton [mailto:bea...@google.com]
> Sent: Thursday, April 22, 2010 11:22 AM
> To: Eran Hammer-Lahav
> Cc: OAuth WG
> Subject: Re: [OAUTH-WG] 'Scope' parameter proposal
> 
> On Thu, Apr 22, 2010 at 11:01 AM, Eran Hammer-Lahav
> <e...@hueniverse.com> wrote:
> > Rules around realms show this is very tricky but unless we update 2617
> > (which we are not chartered to do) we are still stuck with realm as a
> required parameter.
> > One way to avoid this debate is to simply say that clients should use
> > realms to decide when to reuse tokens. It doesn't solve the problem,
> > but it doesn't create a new one either.
> 
> The existing rules for realm are basically same-origin policy.  That doesn't
> actually work for any of the delegated auth solutions that
> OAuth2 is based on, and is meant to replace.  Telling people to use realm is
> terrible, no-good, very-bad advice.
> 
> As far as I can tell, the only practical guidance we can give developers is
> "follow the service provider documentation."
> 
> Cheers,
> Brian
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