Final answer:
To best mitigate the risk of non-authorized users entering a secure building, implementing mantraps is the most effective option among those listed because it physically prevents unauthorized access through interlocking doors.
Step-by-step explanation:
The best method to prevent non-authorized users from entering a secure building is to implement measures that physically prevent entry without authorization. Among the options provided:
- Training users on tailgating involves educating authorized personnel on the risks associated with allowing others to follow them through secure doors, which could be beneficial in raising awareness.
- An escort policy requires guests to be accompanied by authorized personnel at all times within the secure areas.
- Installing mantraps is a very effective physical control that consists of two sets of interlocking doors. An individual must present authorized credentials to move from one set of doors to the next, thereby preventing tailgating.
- Requiring all users to have badges is another effective control but does not address the issue of tailgating on its own.
While all the above measures can contribute to security, mantraps are the best option for mitigating the risk of unauthorized access since they physically control entry and exit points.