What is the anti-passback feature designed to prevent?

The anti-passback feature is specifically designed to prevent the duplicate use of a credential within a specified time frame. It ensures that once a credential is used to access a secure area, that same credential cannot be reused to gain access again until the individual has exited that area and re-entered it. This mechanism is essential in enhancing security by preventing a scenario where someone could lend their credential to another individual to gain unauthorized access to a secure location. By effectively managing credential use, anti-passback helps maintain the integrity of access control systems and promotes accountability for those who are authorized to enter secure areas.