Once confined to Hollywood blockbusters and sci-fi novels, in 2015, the number of humans upgraded by technological devices is increasing in number. Thanks to the invention and wide-spread adoption of implantable aids such as pacemakers, insulin pumps, hearing aids and deep brain stimulation systems, the world is filling with humans who could be considered part machine.

But recent media reports describe another breed of upgraded human, people who implant technology in their bodies not for medical reasons, but simply because of greater convenience in everyday life; people with smart implants that allow them to control door locks, make purchases and gain access to computer systems with the wave of a hand. The question then arises, when we allow our bodies to contain increasing amounts of personal, hackable data, is there cause for concern?