What type of passcode generation does an asynchronous token rely on?

An asynchronous token relies on fixed algorithms for passcode generation. This method generates codes based on established algorithms that don't require resynchronization with a server or time-dependent calculations. Asynchronous tokens produce a new code based on predefined parameters and may incorporate unique factors such as the token ID or an internal counter, which are part of the fixed algorithm.

In contrast, time synchronization is primarily used in synchronous tokens, where the passcodes change according to a time interval. User interaction refers to scenarios where a user might need to input information to generate a code, which is not the case for asynchronous tokens that produce codes automatically. Random number generation is often used in various contexts but does not define the deterministic nature of the fixed algorithms in asynchronous tokens.