Which authentication method uses Time-based One-Time Passwords (TOTP)?

The authentication method that uses Time-based One-Time Passwords (TOTP) is RSA SecurID. TOTP is a type of multi-factor authentication that generates a temporary password based on the current time and a shared secret between the server and the user. This mechanism enhances security by requiring not only something the user knows (like a password) but also something the user has (like a device generating the TOTP).

RSA SecurID specifically implements this technology, allowing users to access systems securely through a unique code that changes at regular intervals, typically every 30 seconds. This method significantly reduces the risk of unauthorized access to systems, as the one-time password is valid only for a brief period.

In contrast, other authentication methods such as password, RADIUS, and LDAP are either based on static credentials or rely on different paradigms for user verification and do not inherently utilize TOTP as a standard mechanism. For instance, while RADIUS may support TOTP if configured, it is not solely based on this method and typically involves additional elements like username and password validations.