For years I've refused to use wireless keyboards because I believed their signals could be intercepted and decoded by keylogging software. Turns out I was right.
If you use a wireless keyboard you may be broadcasting everything you type to hackers – from passwords to credit cards numbers and private emails - as a researcher shows how a homemade bugging device can be made for just £6 [less than US $10].
The creator of the listening device – who has also built a predatory drone which chases and hacks into other drones - has posted a list of components, instructions and source code online to allow anyone to make their own.
The KeySweeper can collect every keystroke made on a nearby keyboard locally and also beams it back to the attacker who placed it via a small chip which acts like a mobile phone.
. . .
Perhaps the most dangerous feature is that it can be made to send an SMS alert to the attacker if a certain combination of letters is detected. It could, for instance, watch for the website address of an online bank and alert the attacker that a password and username is likely to be typed in shortly.
There's more at the link.
Here at home, all the stand-alone keyboards used by Miss D. and I are connected to our computers by USB cables. I strongly recommend that if you use wireless keyboards, you should switch to the older wired technology. It's not difficult for someone to intercept your keyboard's signals - and if you type things like intimate personal information or do online banking or payments, the snooper can find out everything needed to steal your identity and misuse your accounts.