What's generally done today (think Google Calendar, Flickr, etc.) is use 
"private" URLs and mail them around.  It doesn't really meet anyone's standards 
for controlling access to anything valuable -- but it sure is convenient. :-)

        Eve

On 14 Jan 2010, at 11:53 AM, Igor Faynberg wrote:

> John Kemp wrote:
>> ...
>> What delegated authorization protocol should be used to deal with those "not 
>> so serious" use-cases then, if OAuth makes them too expensive?
>> 
>>  
> I expected this question and dreaded it.  I don't have a good answer, and I 
> don't think there is one. (In my defense, the airport security cannot find 
> the way around the wait-wait-wait/shoes-off/belts-off/watches-off routine for 
> "good" people--who are actually the majority.)
> 
> One not-so-good answer, but--I think--a workable one is to consider an 
> (enumerated type) parameter carrying a required security value, something 
> that would have to come from the user initially, and then specify TLS or any 
> other cryptographic delicacy based on such value. The only problem is that 
> end users might happily settle for the highest security, anyway (unless they 
> have to pay for it).
> 
> Igor

Eve Maler
[email protected]
http://www.xmlgrrl.com/blog

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