Zero Trust is a cybersecurity model that assumes no user, device, or application should be trusted by default, whether inside or outside an organization’s network. Instead, every access request must be strictly verified and authenticated before granting permission, regardless of the source. This approach helps protect sensitive data and systems from both external threats and insider risks by enforcing continuous validation, least-privilege access, and strong identity management. Zero Trust replaces the traditional security perimeter with a more granular, adaptive defense strategy.