Cybernetics is the study of control, communication, and feedback in systems. In practice, it looks at how signals move, how a system reacts, and how repeated inputs change future behavior. In cyber security, this matters because attackers and defenders both work through feedback loops: malware adapts to defenses, command-and-control channels steer infected hosts, and security tools adjust based on alerts, telemetry, and operator decisions.
Cybernetics is useful for understanding modern AI systems as well. A chat interface is not just a text generator; it is part of a larger control loop where user prompts shape output and output shapes the next prompt. That makes fluent language a security concern, because persuasive responses can influence trust, action, and policy decisions even when they are wrong. Defenders use cybernetic thinking to design rate limits, monitoring, isolation, and human review that break dangerous loops and keep automated systems under control.