What type of user credential is commonly used in access control systems?

Proximity cards are widely used in access control systems due to their ease of use and effectiveness in providing secure, contactless access. These cards contain RFID technology that allows users to simply wave or hold the card near a reader to gain entry. This quick and efficient process minimizes wait times and is less prone to the security issues associated with traditional physical keys, such as duplication or loss.

In addition to their convenience, proximity cards can be easily issued, deactivated, and tracked within an access control system, making them an efficient option for managing user access in various environments, such as offices, schools, and restricted areas. Their durability and ability to integrate with electronic locking mechanisms enhance their usefulness in modern security applications.

While passwords, biometric scans, and smartphones each have their unique advantages in user authentication, proximity cards stand out in consistent, broad application within access control systems specifically, reinforcing their primary role in this context.