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flag Australian scientists developed invisible data transmission using heat radiation, sending info via subtle infrared changes undetectable by standard tools.

flag Australian researchers have created a covert data transmission system using "negative luminescence" to embed signals in natural heat radiation, making them invisible to the naked eye and standard thermal imaging. flag The method, developed at UNSW and Monash University, uses mid-infrared LEDs based on thermoradiative diodes to send data by subtly altering infrared emissions, with only specialized receivers able to detect the signals. flag Lab tests achieved 100 kilobytes per second, with potential for much higher speeds. flag The technology could enhance security in sensitive communications, though real-world deployment faces challenges in reliability, energy use, and ethical concerns.

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