Wearable firewall

http://www.foxnews.com/scitech/2012/04/20/hacker-proof-pacemaker-unveiled-thanks-to-wearable-firewall/

Researchers from Purdue and Princeton have developed a solution to what could be huge problem, which is a signal-jamming personal firewall for medical devices. So they created a device which they called MedMon which is a firewall that detects potentially malicious communications going into or coming from the device. after identifying malicious signals, MedMon employs electronic jamming, similar to tech used in the military systems.