This book was distributed at the FIDO Authenticate conference in 2024. Its intended format was as a PDF, which you can find here. The following is the contents of the PDF converted to HTML. 1: Introduction 2: Universal Second Factor 3: FIDO2 and passkeys 4: WebAuthn 5: Relying party IDs 6: CTAP2 7: Attestation 8: WebAuthn on the web 9: Extensions 10: Hybrid transport 11: Platform APIs 12: The server side 13: Public key formats 1: Introduction Passwords are rubbish. If you’re reading this book th...