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Re: [webauthn] devicePubKey extension MUST be supported if passkey is supported (#1691)

From: Tim Cappalli via GitHub <sysbot+gh@w3.org>
Date: Mon, 24 Jan 2022 17:42:33 +0000
To: public-webauthn@w3.org
Message-ID: <issue_comment.created-1020368114-1643046151-sysbot+gh@w3.org>
> RPs need to enable the flow that is shown in the following URL **for all platform authenticators**.
> https://docs.google.com/presentation/d/14WXRLDcOOf-3cdnAEBXh2Z_bA8LtLb7FbZE4vNmuPnM/edit?usp=sharing
> **It is to ensure backward compatibility.** How can WebAuthn spec help?

@maxhata from a spec perspective, usage of the device public key extension cannot be enforced, in the same way that attestation is not required today. This is something that should be discussed in FIDO Alliance at the SPWG.

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