Over-the-air TV is broadcast television delivered through electromagnetic waves, usually from a terrestrial transmitter to a receiver antenna, rather than through a cable or internet connection. The signal is shared broadly, so any compatible receiver in range can tune in. In technical terms, it is a one-to-many radio transmission designed for wide coverage and efficient distribution.
In cyber security, the broadcast nature of over-the-air TV matters because the signal can be observed, recorded, or disrupted by anyone with the right equipment and location. Defenders may use spectrum monitoring, signal-strength analysis, and authenticated transport layers in related digital broadcast systems to detect spoofing, interference, or jamming. Attackers, by contrast, can try to inject false content, degrade reception, or exploit weakly protected broadcast infrastructure. The same physics that makes broadcast TV simple and resilient also makes it hard to restrict or hide once transmitted.