Cybersecurity
Zero Trust
A security model that assumes no implicit trust based on network location and continuously verifies every access request.
Zero trust replaces the traditional perimeter model ("trust inside, distrust outside") with the principle "never trust, always verify." Every user, device, and service must be authenticated and authorised for each access, with least-privilege enforcement and continuous monitoring.
For space systems, zero-trust principles apply across ground segments, mission networks, and the links to spacecraft, reducing the blast radius of any single compromise. It aligns with the risk-management expectations of NIS2.