Abstract: A synesthesia-based encryption system and method (referred to as a system) includes a camera that captures an image and a transceiver communicatively coupled to the camera and a video-only network. The system includes a sensor that monitors a location and generates a sensor message. The sensor message include information that represents a state, a measurement, and/or a detection at that location. The system's processor maps colors to characters from the sensor message to generate a replacement image. In some systems, the sensor is encrypted first. The processor integrates the replacement image within the original image or some or all of the video frames captured by the camera to form a combined image(s) and causes a transceiver to transmit the combined image(s) across the video-only network to a destination.