Salasanattomat

Salasanattomat refers to authentication methods that do not require the user to enter a password. In passwordless systems, credentials are bound to a device or another factor and are used to prove identity without manually typing a secret.

Key technologies include WebAuthn and FIDO2, which use public-key cryptography. The service stores a challenge and a public key; the user device stores a private key and performs a cryptographic response when the user presents a biometric or a hardware key. Biometric checks (fingerprint, facial recognition) or external security keys (USB, NFC, Bluetooth) serve as the primary authentication factor. Alternative passwordless approaches include magic links or one-time codes sent via email or authenticator apps.

Advantages include stronger phishing resistance, reduced risk from password reuse, and simplified sign-in experiences. They can improve security for both consumer and enterprise services and support multi-factor configurations without passwords.

Challenges and considerations involve device dependency, recovery options when a device is lost, privacy concerns related to biometrics, and the need for interoperable standards across platforms and services. There are also accessibility concerns for users with certain disabilities and the costs of hardware tokens for some deployments.

Overall, salasanattomat represent a shift in authentication design toward cryptographic credentials and will continue to influence how services secure user access.