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Add Webauthn remoteClientDataJSON extension explainer#1306

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bobomb wants to merge 2 commits intoMicrosoftEdge:mainfrom
bobomb:user/jamalmo/webauthn-remoteclientdatajson
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Add Webauthn remoteClientDataJSON extension explainer#1306
bobomb wants to merge 2 commits intoMicrosoftEdge:mainfrom
bobomb:user/jamalmo/webauthn-remoteclientdatajson

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@bobomb bobomb commented Apr 17, 2026

Adds an explainer for a proposed WebAuthn extension, remoteClientDataJSON, which allows an authorized remote desktop web client to supply the complete clientDataJSON string to the browser so it is passed through verbatim to the platform authenticator. This addresses signature verification failures in remote desktop scenarios, where the browser-constructed clientDataJSON differs from the one the remote host originally passed to the platform authenticator API — a gap that the existing remoteDesktopClientOverride extension does not fully close.

Also updates README.md to list the explainer in the Active Explainers table.

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bobomb commented Apr 18, 2026

@microsoft-github-policy-service agree company="Microsoft"

@bobomb bobomb force-pushed the user/jamalmo/webauthn-remoteclientdatajson branch from 9838480 to 03c0f2b Compare April 20, 2026 19:12
@bobomb bobomb force-pushed the user/jamalmo/webauthn-remoteclientdatajson branch from f9ff8da to b25cfe8 Compare April 20, 2026 19:26
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