Historically, two-factor authentication is not a new concept but its use has become far more prevalent with the digital age we now live in. As recently as February 2011 Google announced two factor authentication, online for their users, followed by MSN and Yahoo.
Body worn video (BWV), also known as body cameras, is a video recording system that is typically utilized by law enforcement to record their interactions with the public or gather video evidence at crime scenes, and has been known to increase both officer and citizen accountability.
The definition of worn is a person or thing that's been changed or damaged from being used, or showing the result of being overworked or worried. An example of worn is a pair of jeans with holes in the knees. Worn is defined as something has been put on the body.