Even when your Chromebook is locked, attackers can access it using a USB stick that mimics the keyboard. However, very soon, Chrome OS will get a new USBGuard function that will prevent such actions. It is already available in the assembly Chrome OS Canary. USBGuard provides additional protection against unauthorized access to the Chromebook. The tool does not allow the Chrome OS operating system to read the code or execute commands from USB devices when the laptop is locked. The new feature is similar to the one that Apple introduced in the recent build of iOS 11. It stops the operation of USB ports if the device remains locked for more than an hour.
It is worth noting that the devices that had their connection to the chromebook at the time of blocking will continue to work. In addition, users will be able to make certain devices in the “white list”, for example, a mouse and keyboard. Chromebooks are more secure than Windows devices. However, any computer can be vulnerable to USB Rubber Ducky. It’s a device that resembles a regular USB flash drive that pretends to be a keyboard and enters pre-programmed keystroke sequences. USBGuard will prevent this on the Chrome OS lock screen.
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