Technology Review (Cambridge, Mass., June 23) -- Someday your fitness tracking band or smart watch could detect whether it was on your wrist or someone else’s, providing a simple way to control access to your home, car, or office and perhaps dissuading would-be thieves. Such technology could also allow confirmation that data streaming from the device is coming from the right person, says U. of I. computer science professor Carl Gunter, who was not involved with the project.