FIDO CTAP 2.1

FIDO Alliance

Client to Authenticator Protocol for FIDO2 security keys, defining USB, NFC, and BLE communication with authenticators.

CTAP 2.1 | Published 2018

Standard Details

CategoryFIDO Alliance
Year Published2018
StatusActive

Compliant Card Types

FIDO2 Security Key (Card Form)

Dual-Interface

Hardware authenticator supporting FIDO2/WebAuthn for passwordless login, available in USB, NFC, and smart card form factors.