It’s possible for every key you type to be monitored.
Each Microsoft wireless keyboard features a special chip operates in a frequency called 2.4GHz RF protocol, which enables wireless communication. When keys are being typed on a wireless keyboard they are encoded whilst being transferred to a computer. This is precisely when KeySweeper, a surreptitious Arduino based device that resembles a USB wall charger but operates nothing like it, swings into action.
In this video Samy Kamker, a security researcher who developed fully functional hardware by spending as little as $10 for the most fundamental rendition, has shown us how to make KeySweeper by using a 3.3 volt Arduino and nRF24L01+ to wirelessly sniff, decrypt, log and then report every keystroke made on a wireless Microsoft keyboard being used nearby.
KeySweeper is powered by a 3.7 volt lithium battery when unplugged. As soon as the innocuous charger is plugged back into the wall the battery charges and ensures back up power, therefore efficiently continuing the vicious cycle of hacking.
Microsoft has issued a statement claims that users of Bluetooth-enabled keyboards and 2.4GHz wireless keyboards designed from July 2011 onwards (using Advance Encryption Standard (AES) technology), are protected from this type of attack.
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