A CMOS sensor is a silicon-based image sensor that converts incoming light into electrical signals. It is the core of most modern cameras, from phones and webcams to surveillance and machine-vision systems. Because silicon responds to more than just visible light, many CMOS sensors can also detect near-infrared wavelengths unless filters block them.
In cyber security, CMOS sensors matter because camera output is often treated as trustworthy evidence or input for automation. The raw signal can be altered by optics, filters, firmware, and software processing, so the final image may not match the scene exactly. Attackers can exploit that gap with light-based spoofing, glare, or infrared interference against cameras and vision systems. Defenders should know the sensor’s spectral limits, use appropriate filters and calibration, and verify how raw data is transformed before it is used for monitoring or access control.