Invisible Communication System Hides Data in Heat

Australian Researchers Develop Secure Transmission Method

Researchers in Australia have developed an "invisible" communication system designed to hide data transmission within natural heat radiation.
The system utilizes a phenomenon known as "negative luminescence," allowing signals to blend into the background of natural heat radiation, appearing as if no data is being sent to outside observers using a thermal camera. Only a receiver equipped with the correct instruments can detect the hidden message.

This method aims to make interception nearly impossible, suggesting potential applications in secure financial communications.

The process incorporates negative luminescence from mid-infrared LEDs via a thermoradiative diode. Initial lab tests have achieved data transmission speeds of 100 kilobytes per second, with expectations for gigabyte speeds as emitters improve.