<div dir="ltr">I have been trying to get my head around this problem to solve the US Health care requirements as specfied here
<a href="https://hl7.org/fhir/smart-app-launch/index.html">https://hl7.org/fhir/smart-app-launch/index.html</a> Note that the focus here is on IAL2 AAL2 authn which requires some sort of TEE.<div>You should also note that they have separated the problem into quadrants, native apps and web apps on one axis and site supplied versus trusted third party on the other.</div><div>I have been focused on the trusted third party app. I sounds like you are asking about site supplied, but both need to be addressed to assure that the right criteria an placed on the right problem.</div><div>A good approach would to address all four at once to give architects the ability to make the right choices, but a third axis would be assurance level. That would be 8 use cases (or 12 if you wanted to address IAL3 as well).</div><div>..tom<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Peace ..tom</div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jul 20, 2019 at 12:11 PM Nat Sakimura via Openid-specs-ab <<a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div dir="ltr">So, what is the best practices for native app + server based client? There can be several patterns but I don't think we have actually documented them.</div>
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<div dir="ltr">An app getting ID token using PKCE and sending it over to the server does not feel right as the binding between the App and the server component is pretty weak.</div>
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<div dir="ltr">An app sending a PKCE request and getting back the code that is being sent to the server with the code verifier that are used by the server component to obtain ID Token feels a bit better.</div>
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<div dir="ltr">Any suggestions?</div>
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Nat Sakimura<br>
Chairman, OpenID Foundation<br>
<a href="https://nat.sakimura.org" target="_blank">https://nat.sakimura.org</a></div>
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