Using your laptop in public could be risky, especially when you type passwords, check your bank, credit card account or type any sensitive information.
I read about a study from a security research that shows keyboards were not safe when transmitting information.
The study was conducted in Switzerland (School of Computer and Communication Sciences at EPFL ) on keyboards connecting via USB as well keyboards embedded in laptops.
Every keyboard type showed vulnerability. One was even vulnerable from a distance of over 60 feet.
Data is sniffed by an antenna placed in the vicinity of the victim, that picks electromagnetic signals radiated from any keyboard key when pressed.
Don’t type any sensitive information ( passwords, credit cards, .. ) using your laptop in public.
To read more about the study, click here.