Surveillance is the collection of information about people, devices, or activity for observation or analysis. In cybersecurity, it includes logs, device identifiers, location data, message metadata, camera feeds, and other signals that can be combined into detailed profiles. The security concern is not only what is collected, but who can reach it, how long it is kept, and whether it can be exported or correlated with other records.
Surveillance matters because these systems concentrate sensitive data and often become high-value targets. Weak access control, broad permissions, or poor retention limits can turn a monitoring platform into a source of overexposure. Defenders reduce risk with least privilege, encryption, audit logs, and data minimization. Attackers may abuse stolen monitoring data to track behavior, map networks, identify targets, or bypass privacy protections. In practice, surveillance security is about controlling the record of what was seen.