Zero Trust Security Model

About

The Zero Trust Security Model is a security framework that operates on the principle of "Never Trust, Always Verify." Unlike traditional security models that assume everything inside an organization's network is safe, Zero Trust requires strict verification for every user, device, and application trying to access resources—regardless of whether they are inside or outside the network perimeter.

Principles of Zero Trust

1. Continuous Verification – Every access request must be authenticated, authorized, and continuously validated before granting permissions.

2. Least Privilege Access – Users and systems get only the minimum necessary access required for their tasks.

3. Micro-Segmentation – Networks are divided into small, isolated zones to limit the impact of breaches.

4. Assume Breach Mentality – Always operate under the assumption that an attacker is already inside the system.

5. Device and Endpoint Security – Verification extends beyond users to the security posture of devices accessing the system.

6. Strong Authentication – Multi-factor authentication (MFA) and risk-based authentication are enforced.

7. Comprehensive Logging and Monitoring – All access and activities are continuously monitored and logged to detect anomalies.

Difference Between Zero Trust Security Model & Zero Trust Architecture

Aspect	Zero Trust Security Model	Zero Trust Architecture
Definition	A security philosophy and approach based on continuous verification and least privilege.	A practical implementation of the Zero Trust principles using specific security technologies and strategies.
Scope	High-level security concept that applies to policies, identity management, and access control.	Technical implementation, including network segmentation, endpoint security, and policy enforcement mechanisms.
Implementation	Can be implemented across different architectures, including cloud and on-premises environments.	Defines how to design an IT infrastructure that enforces Zero Trust principles.
Focus	Focuses on security policies and principles.	Focuses on how to enforce and implement these principles.