Since October 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The getPublicKeyAlgorithm() method of the AuthenticatorAttestationResponse interface returns a number that is equal to a COSE Algorithm Identifier, representing the cryptographic algorithm used for the new credential.
This is a convenience function created to allow easy access to the algorithm type. This information will need to be stored in order to verify future authentication operations (i.e., using navigator.credentials.get()).
getPublicKeyAlgorithm()
None.
A number that is equal to a COSE Algorithm Identifier, representing the cryptographic algorithm used for the new credential.
See Creating a public key credential for a detailed example.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
getPublicKeyAlgorithm |
85 | 85 | 119 | 71 | 16 | 85 | 119 | 60 | 16 | 14.0 | No | 16 |
© 2005–2025 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/AuthenticatorAttestationResponse/getPublicKeyAlgorithm