Counterspace refers to capabilities used to deny, degrade, disrupt, or defend against the use of space systems. It is a broad military and security term, not just a single weapon. Counterspace actions can target satellites, their radio links, ground stations, mission software, or the supporting network that controls them. Because space services depend on all of these layers, a system can be affected without being physically destroyed.
This matters in cyber security because modern space infrastructure is a hybrid attack surface. Jamming, spoofing, malware in ground control, compromised credentials, or disrupted telemetry can all create counterspace effects. Defenders use the same domain to protect assets: encryption, access control, segmentation, monitoring, resilient command links, and rapid attribution. In practice, counterspace thinking links orbital operations with cyber defense, emphasizing that control of data, commands, and communications is as important as control of the satellite itself.