Contact emails
a...@chromium.org, marti...@google.com

Explainer
None


Specification
None


Summary

Support the attestationFormats field from WebAuthn L3. WebAuthn L3 supports a 
site expressing an ordered preference for credential attestation formats in the 
new attestationFormats field[1]. This feature enables support for this on 
Android, where multiple formats can be supported by passkey providers. [1] 
https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats



Blink component
Blink>WebAuthentication


TAG review
None


TAG review status
Pending


Origin Trial Name
WebAuthn attestationFormats


Chromium Trial Name
WebAuthnAttestationFormats


Origin Trial documentation link
https://w3c.github.io/webauthn/#dom-publickeycredentialcreationoptions-attestationformats


WebFeature UseCounter name
kWebAuthentication_AttestationFormats


Risks




Interoperability and Compatibility

None


Gecko: No signal

WebKit: No signal

Web developers: No signals

Other signals:


WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?

None




Goals for experimentation




Reason this experiment is being extended

The Play Services SDK on Android was recently updated with an equivalent option 
for native apps. We would like to request an extension of this trial for two 
milestones to give Relying Parties more time to use this option in alongside in 
websites and native apps.



Ongoing technical constraints

None



Debuggability

None



Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
No


Is this feature fully tested by web-platform-tests?
No


Flag name on about://flags
None


Finch feature name
None


Non-finch justification
None


Requires code in //chrome?
False


Estimated milestones


Origin trial desktop first 130

Origin trial desktop last 136

Origin trial extension 1 end milestone 138

Origin trial Android first 130

Origin trial Android last 136




Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5121935290400768?gate=6128665261506560


Links to previous Intent discussions
Intent to Experiment: 
https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAL9PXLxCRDEFwvz-KrPymBz53OZh92PRHTChTeStDEOsYZe%3Dzw%40mail.gmail.com



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