Even if a smartphone is offline, in flight mode, encrypted or locked, Chinese authorities could still be able to determine which apps are being used by analysing faint electromagnetic signals emitted as the device operates. Researchers at the People’s Public Security University of China have developed a method that identifies smartphone applications and user actions through low-frequency electromagnetic radiation. In their findings published in the peer-reviewed journal Radioengineering on May…
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Wow! I thought it was cool when German researchers figured out how to use wif fi signal disruptions to create a 3d holographic videos. This is like that inside out backwards and upside down but just as cool.
