Can you explain the concept of zero trust policy and how it is implemented in information security?

Zero Trust security policy is an information security concept according to which no user or device is automatically trusted, even if they are inside the corporate network.

Main principles:

• Verify every request: access is granted only after strict authentication and authorization.
• Least privilege: users and services are granted only the rights necessary for their work.
• Network microsegmentation: dividing the network into isolated zones to limit threat spread.
• Continuous monitoring and analysis: tracking activity to detect anomalies.

Implementation includes:

• Use of multi-factor authentication (MFA).
• Role-based and policy-based access control.
• Encryption of data in transit and at rest.
• Deployment of intrusion detection systems and behavior analysis.

Example: an employee attempts to access an internal application — the system requires identity verification, checks the device for compliance with security policies, and grants access only to the necessary resources, not the entire network.