Zero Trust Model

In this lesson, you'll learn about the Zero Trust security model, which is essential for protecting modern environments where people, devices, applications, and data are distributed and accessed from various locations.

Introduction to Zero Trust

Zero Trust is a security framework that assumes that no entity, either inside or outside the network, is trustworthy by default. The model operates on the principle that threats could be present both outside and inside the network. Therefore, every request for access must be verified before granting access, regardless of the source.

Guiding Principles of Zero Trust

Verify Explicitly : Always authenticate and authorize based on all available data points, such as user identity, location, device health, data classification, and anomalies.
Use Least Privilege Access : Limit user access with Just-In-Time (JIT) and Just-Enough-Access (JEA), as well as risk-based adaptive policies and data protection measures.
Assume Breach : Minimize potential damage by segmenting access and implementing end-to-end encryption. Use analytics to enhance visibility, detect threats, and improve defenses.

Adjusting to Zero Trust

Traditionally, corporate networks were designed to be secure, assuming that internal devices and users were trustworthy. This included restricted network access, tightly controlled VPN access, and restrictions on personal devices.

The Zero Trust model inverts this approach. Instead of assuming safety based on network location, Zero Trust requires explicit verification of identity and access rights. This means every request must be authenticated and authorized, regardless of its origin.

Classic Approach vs. Zero Trust Approach

The classic security approach and the Zero Trust model have significant differences:

Classic Approach

Network-Centric Security : The classic approach focuses on securing the network perimeter. Once a device or us…