^{Part 4 in a series on orbital communications}

Spacecraft today operate in an environment defined by two accelerating forces: the explosive growth of satellites in orbit, and the rapid evolution of cyber threats targeting them. As missions become more autonomous, networked, and interdependent, the need for strong, adaptable security has moved from a supporting feature to an operational requirement.

Viasat’s answer is a new generation of reprogrammable space cryptography—a system designed to secure every layer of HaloNet’s communications infrastructure. While previous articles in this series explored how HaloNet delivers continuity (launch telemetry) and flexibility (hybrid terminals), this article turns to the capability that makes…