Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
attestation
is an optional property of the PublicKeyCredentialCreationOptions
dictionary. This is a string whose value indicates the preference regarding the attestation transport, between the authenticator, the client and the relying party.
The attestation is a mean for the relying party to verify the origin of the authenticator with an attestation certificate authority. The information contained in the attestation may thus disclose some information about the user (e.g. which device they are using).
Syntax
attestation = publicKeyCredentialCreationOptions.attestation
Value
A string which may be
"none"
: the relying party is not interested in this attestation. This avoids making a check with the attestation certificate authority and asking the user consent for sharing identifying information."indirect"
: the client may change the assertion from the authenticator (for instance, using an anonymization CA). This value is used when the relying party wishes to verify the attestation."direct"
: the relying party wants to receive the attestation as generated by the authenticator.
The default value is "none"
.
Examples
var publicKey = { attestation: "indirect", challenge: new Uint8Array(26) /* this actually is given from the server */, rp: { name: "Example CORP", id : "login.example.com" }, user: { id: new Uint8Array(26), /* To be changed for each user */ name: "jdoe@example.com", displayName: "John Doe", }, pubKeyCredParams: [ { type: "public-key", alg: -7 } ] }; navigator.credentials.create({ publicKey }) .then(function (newCredentialInfo) { // send attestation response and client extensions // to the server to proceed with the registration // of the credential }).catch(function (err) { console.error(err); });
Specifications
Specification | Status | Comment |
---|---|---|
Web Authentication: An API for accessing Public Key Credentials Level 1 The definition of 'attestation' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
attestation | Chrome Full support 67 | Edge Full support ≤79 | Firefox Full support 60 | IE ? | Opera ? | Safari Full support 13 | WebView Android No support No | Chrome Android Full support 67 | Firefox Android ? | Opera Android ? | Safari iOS Full support 13.3 | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.