w3.org

Execute the WebAuthn registration ceremony client-side using navigator.credentials.create with PublicKeyCredentialCreationOptions

Execute the WebAuthn authentication ceremony client-side using navigator.credentials.get and verify the assertion server-side

Configure passkey (discoverable/resident credential) registration with residentKey=required and userVerification=required

Implement passkey autofill (conditional UI) using mediation:'conditional' in navigator.credentials.get

Choose and configure attestation conveyance preference (none, indirect, direct, enterprise) in WebAuthn registration

Distinguish and configure platform vs cross-platform authenticator attachment in WebAuthn

Correctly scope relying party ID (rpId) and handle cross-subdomain passkey sharing

Implement signature counter clone detection to identify cloned authenticators

Understand passkey sync across devices via iCloud Keychain and Google Password Manager

Issue and verify a W3C Verifiable Credential using the VC Data Model 2.0

Implement the Digital Credentials API (navigator.credentials with DigitalCredential type) for in-browser mDL / VC requests

Implement the WebAuthn Signal API to synchronize server-side passkey revocations to platform passkey providers

Implement WebAuthn Related Origin Requests (ROR) to share passkeys across related domains

Issue a W3C VC Data Model 2.0 credential with a Data Integrity proof using ECDSA

Add a W3C Bitstring Status List revocation entry to an Open Badges 3.0 credential and update issuer status list document

Issue a W3C Verifiable Credential for a learning achievement using the VC Data Model 2.0 with an education-specific achievement type

Implement a Verifiable Presentation request for education credentials using the W3C Presentation Exchange specification in a hiring platform

Convert SRT subtitles to WebVTT and handle cue formatting differences

Implement badge revocation using the W3C Bitstring Status List in an Open Badges 3.0 issuer