An anonymous reader writes: Plugging in random USB sticks in your computer has never been more dangerous, as a researcher who goes by the name Dark Purple has demonstrated his new device: USB Killer 2.0. When plugged into a computer, the deadly USB draws power from the device itself. With the help of a voltage converter the device's capacitors are charged to 220V, and it releases a negative electric surge into the USB port. This surge "fries" the USB port and, in the researcher's demonstration, the motherboard — perhaps not always after the first surge, but the malicious USB device repeats the process until no more power can be drawn.
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