proposal: RP display
Dick Hardt
dick at sxip.com
Wed Sep 20 05:29:56 UTC 2006
Good point. I can't think of a good reason why it must be in core
right now.
On 19-Sep-06, at 7:23 PM, Brad Fitzpatrick wrote:
> Any reason this can't be an optional extension rather than optional
> in the
> core?
>
>
> On Tue, 19 Sep 2006, Dick Hardt wrote:
>
>>
>> A trusted CA would have signed the PayPal logo. As mentioned,
>> CardSpace is doing this, so OpenID would be able to follow what works
>> (or does not)
>>
>> On 19-Sep-06, at 4:48 PM, Brad Fitzpatrick wrote:
>>
>>> Drawbacks:
>>> - false sense of security
>>>
>>> Can't badguy.com just crypto sign a PayPal logo hosted on
>>> badguy.com?
>>>
>>>
>>>
>>> On Mon, 18 Sep 2006, Dick Hardt wrote:
>>>
>>>> Problem:
>>>>
>>>> Identity of the RP is based on either the return_url or trust_root.
>>>> While these strings have the advantage that they are somewhat
>>>> verifiable as they are where the response will be sent, neither of
>>>> these are user friendly. An organization name and/or a graphic
>>>> can be
>>>> more communicative. Additionally, when the user is wanting to
>>>> review
>>>> something that happened with an RP later on, the URL may be quite
>>>> cryptic.
>>>>
>>>> The question arises, how does the IdP verify that the string or
>>>> graphic is really associated with the RP? Given that the user
>>>> started
>>>> off at the RP, and that somehow the user knows the RP is really the
>>>> RP (a separate issue), then the user will be surprised by a graphic
>>>> or string that is not related to the site the RP. In other
>>>> words, if
>>>> the user is being phished, a cryptic URL is not going to
>>>> provide the
>>>> user with anything they have not already seen in the browser. An
>>>> org
>>>> name and/or graphic can be verified to belonging to the RP by a 3rd
>>>> party, so the IdP can show the user if the displayed info has been
>>>> verified or not.
>>>>
>>>> CardSpace is supporting signed graphics and I think is looking
>>>> at the
>>>> CA cert to check org name, so OpenID would be able to use a similar
>>>> mechanism.
>>>>
>>>> Proposal:
>>>> The additional of two optional parameters:
>>>> = 'openid.logo_url - URL of either a signed or unsigned graphic
>>>> (size TBD)
>>>> = 'openid.org_name' - organization name of RP
>>>>
>>>> Benefits:
>>>> + improved user experience
>>>> + mechanism for IdP to display verified data about RP to user
>>>>
>>>> Drawbacks:
>>>> - additional work required for IdP to support, although IdP could
>>>> ignore
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>> specs at openid.net
>>>> http://openid.net/mailman/listinfo/specs
>>>>
>>>>
>>>
>>>
>>
>>
>
>
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