A Zero Trust network security model is based on which security principle?

The Zero Trust network security model is fundamentally based on the principle of least privilege. This principle dictates that users should only have the access necessary to perform their job functions and nothing more. This approach minimizes the potential for unauthorized access to sensitive information and limits the potential damage that can occur if an account is compromised.

In a Zero Trust model, every access request is treated as if it originates from an open network. Instead of automatically trusting users or devices based on their location (i.e., inside or outside the network perimeter), the system continuously verifies and monitors all actions and requests for access. Adopting the least privilege principle ensures that even if a user or device is compromised, the access to critical resources remains restricted, thereby enhancing the overall security posture of the organization.

This is a core aspect of Zero Trust, emphasizing that trust is never assumed and always requires verification, which aligns directly with the least privilege access strategy.