Which security model assumes the worst-case security scenario, and protects resources accordingly? Zero trustDefense-in-depthRole-based access control

The security model that assumes the worst-case security scenario and protects resources accordingly is the Zero Trust model.

Explanation:

1. Zero Trust Model: This principle operates on the notion that threats could exist both inside and outside the network. Therefore, it does not automatically trust any user or system, regardless of whether the request comes from within or outside the organization’s perimeter. Instead, it requires rigorous verification and validation for every access attempt to resources, implementing strict access controls and continuous monitoring.

2. Defense-in-Depth: This approach utilizes multiple layers of security measures (technical, administrative, and physical) to protect resources but does not strictly assume the worst-case scenario at the individual access level as Zero Trust does.

3. Role-Based Access Control (RBAC): This model restricts system access to authorized users based on their roles within an organization, providing a framework for access control but lacking the assumption of continuous verification found in Zero Trust.

Thus, the Zero Trust approach is particularly noted for its proactive security posture by assuming the worst-case security situation and acting accordingly.