Re: [Last-Call] [OAUTH-WG] Last Call: <draft-ietf-oauth-jwt-introspection-response-09.txt> (JWT Response for OAuth Token Introspection) to Proposed Standard

[Brian Campbell <[e-mail]>]

+1

On Thu, Aug 27, 2020 at 8:20 AM Justin Richer <[e-mail]> wrote:

> I would clarify that this doesn’t necessarily say that the user’s there,
> and remove the normative requirement (which doesn’t have enforceable teeth
> in this context):
>
> Implementers should be aware that a token introspection request lets the
> AS know when the client
>     (and potentially the user) is accessing the RS, which *can also
> indicate* when the user is using
>     the client. If this implication is not acceptable, *implementers can
> use other means* to carry
>     access token data, e.g. directly transferring the data needed by the
> RS within the access token.
>
>
>  — Justin
>
> On Aug 27, 2020, at 9:48 AM, Torsten Lodderstedt <
> torsten=[e-mail]> wrote:
>
> Will the following text work for you?
>
> Implementers should be aware that a token introspection request lets the
> AS know when the client
>     (and potentially the user) is accessing the RS, which is also an
> indication of when the user is using
>     the client. If this impliction is not accepatable, implementars MUST
> use other means to carry
>     access token data, e.g. directly transferring the data needed by the
> RS within the access token.
>
>
> On 26. Aug 2020, at 23:12, Mike Jones <
> Michael.Jones=[e-mail]> wrote:
>
> I agree with Dick’s observation about the privacy implications of using an
> Introspection Endpoint.  That’s why it’s preferable to not use one at all
> and instead directly have the Resource understand the Access Token.  One
> way of doing this is the JWT Access Token spec.  There are plenty of others.
>
> The downsides of using an Introspection Endpoint should be described in
> the Privacy Considerations section.
>
>                                                       -- Mike
>
> From: OAuth <[e-mail]> On Behalf Of Dick Hardt
> Sent: Wednesday, August 26, 2020 9:52 AM
> To: Torsten Lodderstedt <torsten=[e-mail]>
> Cc: [e-mail]; oauth <[e-mail]>
> Subject: Re: [OAUTH-WG] Last Call:
> <draft-ietf-oauth-jwt-introspection-response-09.txt> (JWT Response for
> OAuth Token Introspection) to Proposed Standard
>
>
>
> On Wed, Aug 26, 2020 at 4:37 AM Torsten Lodderstedt <
> torsten=[e-mail]> wrote:
> Hi Denis,
>
> On 25. Aug 2020, at 16:55, Denis <[e-mail]> wrote:
>
>
> The fact that the AS will know exactly when the introspection call has
> been made and thus be able to make sure which client
> has attempted perform an access to that RS and at which instant of time.
> The use of this call allows an AS to track where and when
> its clients have indeed presented an issued access token.
>
>
> That is a fact. I don’t think it is an issue per se. Please explain the
> privacy implications.
>
> As I see it, the privacy implication is that the AS knows when the client
> (and potentially the user) is accessing the RS, which is also an indication
> of when the user is using the client.
>
> I think including this implication would be important to have in a Privacy
> Considerations section.
>
> /Dick
> ᐧ
>
>
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