US startup Bastille Networks found wireless keyboards vulnerable to KeySniffer attack. Keyboards that have vulnerability transmit information unencrypted. This means all keystrokes sent are in plaintext and can be easily read and recorded by anyone with the right eavesdropping hardware. Vulnerable keyboards also cant be patched or updated, meaning theres no fix or update to secure a wireless keyboard that is vulnerable to the attack. The only fix for a vulnerable keyboard is to stop using it.”]
Source: https://nakedsecurity.sophos.com/2016/07/27/keysniffer-heres-what-you-need-to-know/