Again, this mimics a singly-capable Tricorder device where hand-held electronics receive wireless signals about the temperature inside your body.

FORBES: Ingestible, Implantable, or Intimate contact; How Will You Take Your Micro-scale Body Sensors

The devices would also circumvent many existing challenges that hamper implantable electronics, namely concerns over longterm effects inside the body, as well as painful or costly implant removal and replacement.

FORBES: DARPA's 'Transient Electronics' Will Disappear Anywhere

However, a paper to be presented at a security conference held under the auspices of the Institute of Electrical and Electronics Engineers, a New York-based professional body, in May, sheds some light.

ECONOMIST: Computer passwords

As part of a broader strategy, Xsens now offers IP originally developed for professional (B2B) applications of 3D body motion tracking using wearable motion trackers for mass market application in the consumer electronics industry.

ENGADGET: Xsens teases wearable 3D body sensors that won't cost, will track an arm and a leg (video)