Beware of keystroke loggers disguised as USB phone chargers
FBI officials are warning private industry partners to be on the lookout for highly stealthy keystroke loggers that surreptitiously sniff passwords and other input typed into wireless keyboards.
http://arstechnica.com/security/2016/05/beware-of-keystroke-loggers-disguised-as-usb-phone-chargers-fbi-warns/