e-INFRA CZ AAI offers multi-factor authentication using TOTP and WebAuthn. Users may also generate backup OTP codes for regaining access in case they lose their tokens. Detailed instructions can be found here.
Available methods
TOTP
TOTP is a standard method for one time code generation, defined in RFC 6238, and used by many commercial services. TOTP app has a shared secret with the server and generates time-constrained numerical codes based on that secret. The most common setting is with 6 digits and validity of 30 seconds.
WebAuthn
WebAuthn, short for Web Authentication API, is a modern standard created by W3C and FIDO. This method offers a high level of security while protecting your privacy, it is also easy to use. WebAuthn is often a part of the operating system, so you do not need to install anything on most devices.