📖 What is Zero Trust?
Zero Trust is a security framework based on the principle 'never trust, always verify.' It requires strict identity verification for every person and device attempting to access resources, regardless of whether they are inside or outside the network perimeter.
"Zero Trust shifts the security perimeter from the network edge to the individual user, device, and workload."
📚 Certification: Certified in Cybersecurity (CC)
🔑 What are the Key Concepts of Zero Trust?
- ▸ The Principle of Least Privilege ensures users and devices are granted only the minimum access necessary to perform their specific tasks.
- ▸ Continuous Verification requires that identity and security posture be re-validated throughout the session, not just during the initial login process.
- ▸ Micro-segmentation divides the network into small, isolated zones to prevent attackers from moving laterally if they breach a single point.
- ▸ Removal of Implicit Trust eliminates the assumption that users or devices inside the corporate network are inherently safe or trustworthy.
- ▸ Device Health Attestation verifies that a device is patched and secure before allowing it to connect to sensitive organizational resources.
🎯 How does Zero Trust appear on the CC Exam?
You may be asked to identify the security framework being implemented when a company stops trusting internal network traffic and requires MFA for every resource access.
A scenario might describe a breach where an attacker moved from a guest Wi-Fi account to a server; you would identify micro-segmentation as the Zero Trust solution.
Expect questions comparing the traditional 'Castle-and-Moat' security model with the Zero Trust approach to perimeter-less security.
❓ Frequently Asked Questions
Does implementing Zero Trust mean we no longer need traditional firewalls?
No, firewalls remain useful for traffic filtering, but Zero Trust shifts the focus from network-level boundaries to identity-based access and granular control.
What is the primary difference between a VPN and a Zero Trust Network Access (ZTNA) approach?
VPNs often grant broad access to a network segment once authenticated, whereas ZTNA provides secure access to specific applications based on identity and context.