What are the three types of token authentication?

In the context of token authentication, the correct categorization into three types includes Synchronous, Asynchronous, and Possession-Based.

Synchronous token authentication refers to methods where the token generates a one-time password (OTP) that is valid only for a short period and changes at fixed intervals, usually synchronized between the server and the token device. This ensures that only users in possession of the physical token can access the system when they have the current OTP.

Asynchronous token authentication involves a token that generates codes independently of the server's time clock. This might include systems such as challenge-response models that securely verify user identity without the need for real-time sync. The user responds to a challenge from the server with a token-generated response.

Possession-Based token authentication relies on the user having something in their possession, such as a hardware token or smart card. This method emphasizes the requirement of an external artifact that functions as a key in the authentication process. This complements the concept of something the user knows (like a password) or something the user is (biometric factors).

This triadic framework effectively encompasses various token authentication styles, making option B the most accurate choice. It integrates how tokens operate within synchronous and asynchronous frameworks, as well as their nature of possession