What principle indicates that two people must enter sensitive areas together?

The principle that indicates two individuals must enter sensitive areas together is referred to as Two Person Integrity. This concept is essential in enhancing security by ensuring that no single individual has sole access to sensitive areas or information, thereby minimizing the risk of unauthorized actions or security breaches.

Implementing Two Person Integrity helps in fostering accountability and oversight, as actions taken within those areas or on sensitive data can be verified and checked by another individual. This principle is often applied in environments where critical systems require a higher level of trust, such as in military operations or secure facility accesses.

In contrast, while Two Person Control, Two Personnel Control, and Joint Access Control may seem related, they do not specifically focus on the requirement for two individuals to be present simultaneously to mitigate risk in sensitive areas. Two Person Control typically refers to a similar idea but is more focused on supervision instead of the integrity aspect. Thus, Two Person Integrity captures the essence of requiring collective presence for security purposes.