FIDO AppID and Facet Specification

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Sachit Sharma

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Mar 14, 2022, 9:12:34 AM3/14/22
to fido...@fidoalliance.org
Hey Community Members,

I am trying to use AppID and Facet ID implementations to connect my website and android application(present on the same device)(basically exploring whether it is possible to share a Private Public keypair that is stored on the same android device in TPM).
I am following the following document, but it is 4 years old. Is this the latest version? 

Also, any resources for a demo that make use of this?

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Regards,
Sachit Sharma

Ackermann Yuriy

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Mar 14, 2022, 9:16:06 AM3/14/22
to Sachit Sharma, FIDO Dev (fido-dev)
Hey Sachit.

If you are trying to use AppID for Android app, there is a assetlinks for that: https://developers.google.com/identity/fido/android/native-apps#interoperability_with_your_website

For everything else WebAuthn API moved to the RPID/Origin https://w3c.github.io/webauthn/#relying-party-identifier


Yuriy Ackermann
FIDO, Identity, Standards
skype: ackermann.yuriy
github: @herrjemand
twitter: @herrjemand
medium: @herrjemand


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Sachit Sharma

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Mar 14, 2022, 9:22:55 AM3/14/22
to Ackermann Yuriy, FIDO Dev (fido-dev)
Hey Ackermann,
Thanks for your reply.
Can you please throw some more light on the Asset link, does it help me to share my Keypair to the authentication ceremony? or does it only redirects the user from the website to the android application?
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Regards ,
Sachit Sharma

John Bradley

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Mar 14, 2022, 9:31:01 AM3/14/22
to FIDO Dev (fido-dev), sachits...@gmail.com, FIDO Dev (fido-dev), Ackermann Yuriy
The asset link allows your app to use the RPID from the web in its WebAuthn API call.   The WebAuthn platform in Android checks the asset link to validate that only your apps can use your RPID URI.
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