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Definition
Zero Trust security is a cybersecurity model based on the principle of “never trust, always verify.” Instead of automatically trusting users or devices inside a network, it requires identity verification, access controls, and continuous checks before allowing access to sensitive systems or data.

Why it matters
Zero Trust security matters because modern work happens across cloud apps, remote devices, and distributed networks. It helps reduce the risk of unauthorized access, stolen credentials, insider threats, and lateral movement by limiting access to only what each user or device needs.

Example use case
An employee tries to access a company dashboard from a new laptop. Before granting access, the system checks the user’s identity, device status, location, and permissions, then only allows access to the specific tools required for their role.