WebAuthnFIDO2teknik

WebAuthnFIDO2teknik refers to the combined use of WebAuthn and the FIDO2 protocol suite to enable passwordless, phishing-resistant authentication on the web. It relies on public-key cryptography and specialized authenticators to verify user identity without transmitting a password.

WebAuthn is a W3C standard developed with the FIDO Alliance. It defines a web API that allows sites to create and use public-key credentials for user login. FIDO2 encompasses WebAuthn and CTAP (Client To Authenticator Protocol), the protocol that connects authenticators—such as security keys or built-in platform keys—to a user’s device. CTAP2 enables both roaming and platform authenticators to communicate with a web browser.

Operation generally follows two phases: registration and authentication. During registration, the relying party (the web service) requests the creation of a new credential; the user approves it, and the authenticator generates a public/private key pair. The public key is stored by the server, while the private key remains securely on the authenticator. Attestation data may be provided to help the service assess device trust. During authentication, the server issues a challenge; the authenticator signs the challenge with the private key, and the server verifies the signature against the stored public key.

Security and usability advantages include phishing resistance, elimination of shared passwords, and reduced risk of credential theft. It supports multi-factor setups and can use platform or external security keys. Considerations for deployment include browser and device compatibility, recovery options for lost authenticators, and privacy policies around attestation data. The term WebAuthnFIDO2teknik is commonly used to describe standards-based passwordless authentication workflows in modern web ecosystems.