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"Researchers have taken a step towards making battery-free devices a reality via the convergence of LiFi and RF backscatter technologies"

hackster.io/news/iot-devices-w

"Hanoi Police Department was using a QR generation system to provide COVID passes ... The system was vulnerable to a weak key cryptography attack which may allow COVID patients to self-generate passes"

ctrsec.io/index.php/2021/09/29

@lupyuen I used to have my aprs rigged up to my mobile nber so I could send and receive texts through my handheld radio.
No privacy, but fun!

COVID-19 vaccination certificates in the Darkweb: "it is possible to buy fake vaccination certificates issued in most countries worldwide"

arxiv.org/abs/2111.12472

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