What is the main purpose of one-time passwords?

One-time passwords (OTPs) are primarily designed to enhance security by reducing the risk of credential theft. Unlike traditional passwords, which remain constant and can be reused, OTPs are valid for a single session or transaction. This means that even if an attacker intercepts an OTP, it becomes useless after its first use, significantly diminishing the chances of unauthorized access.

The transient nature of OTPs ensures that even if a legitimate user’s credentials are compromised, the window for exploitation is limited to one session or action. This makes it much more difficult for attackers to gain long-term access, thereby protecting sensitive information and systems.

Other options do not align with the core functionality of OTPs. For instance, OTPs do not provide permanent access for users; rather, they are designed for temporary use. While they may simplify certain aspects of user authentication, that is not their primary purpose. Similarly, OTPs are not intended to reduce the frequency of password changes; instead, they serve as an additional security measure to safeguard user accounts and enhance overall security protocols.