Zero Trust Principles and the BeyondCorp Model
Understand never-trust-always-verify, the BeyondCorp shift, and how Google implemented Zero Trust.
What is Zero Trust?
Zero Trust is a security framework based on the principle "never trust, always verify." Unlike perimeter-based security which trusts everything inside the network, Zero Trust requires continuous verification of every user, device, and application — regardless of location.
The Death of the Perimeter
Traditional perimeter security assumed inside = trusted. This model broke down because:
- Cloud services are outside the perimeter
- Remote work puts employees everywhere
- Lateral movement within trusted networks is trivially easy
- 70%+ of breaches involve insider threats or stolen credentials
All lessons in this course
- Zero Trust Principles and the BeyondCorp Model
- Identity and Device Verification
- Microsegmentation and Network Policy
- Continuous Validation and Monitoring