A security architect is designing a new security posture based on the Zero Trust model. The architect wants to ensure that every access request is fully authenticated, authorized, and encrypted before granting access, and that access is granted only to the minimum necessary resources. Which three principles of Zero Trust align with these requirements? (Choose three.)
Trap 1: Network segmentation
Network segmentation, while a critical security control, is not one of the three core guiding principles of Zero Trust. Instead, it is a technical implementation strategy often employed to achieve the objectives of the "Assume breach" principle by creating isolated network zones and limiting lateral movement, thereby reducing the blast radius of a potential compromise.
- A
Verify explicitly
"Verify explicitly" is a foundational Zero Trust principle requiring all access requests to be rigorously authenticated and authorized based on all available data points, including user identity, location, device health, service, and data classification. This continuous verification ensures that trust is never implicit and access is granted only after explicit validation of every connection and resource request, even for internal network traffic.
- B
Least privilege access
The "Least privilege access" principle dictates that users and systems should only be granted the minimum necessary permissions required to perform their specific tasks for the shortest possible duration. This approach significantly reduces the potential attack surface and limits the "blast radius" in the event of a compromise, often implemented through just-in-time (JIT) and just-enough-access (JEA) strategies.
- C
Assume breach
The "Assume breach" principle mandates that organizations operate under the assumption that a breach is inevitable or has already occurred, regardless of existing perimeter defenses. This proactive mindset drives strategies like micro-segmentation, robust monitoring, and rapid incident response capabilities to minimize the impact and lateral movement of an attacker within the environment, thereby limiting the potential damage.
- D
Network segmentation
Why wrong: Network segmentation, while a critical security control, is not one of the three core guiding principles of Zero Trust. Instead, it is a technical implementation strategy often employed to achieve the objectives of the "Assume breach" principle by creating isolated network zones and limiting lateral movement, thereby reducing the blast radius of a potential compromise.