Final answer:
Time-based authentication in infrastructure portals means users can access systems only during certain times, like work hours, enhancing security by preventing off-hours access. It might also involve one-time passwords valid for short periods.
Step-by-step explanation:
Time-based authentication is a security feature often required in various infrastructure portals. It necessitates that a user's access to systems or services is contingent upon a certain time or schedule. For instance, an employee might only be allowed to access a company portal during their work hours. This method of security helps to enhance the overall safety of the portal by restricting access to unauthorized time frames, which could be critical for sensitive or highly secure environments.
Implementing time-based authentication typically involves integrating a system that checks the user's credentials against the current time and either grants or denies access based on predefined access rules. This can also be extended to include dynamic one-time passwords (OTPs), which are only valid for a short period, often a minute or two.