On Wednesday, August 07, 2013 13:43:06 Joe Abley wrote: > On 2013-08-07, at 13:28, Ted Lemon <Ted.Lemon@xxxxxxxxxxx> wrote: > > [...] I don't think you can argue that carrying an RFID tag with a simple > > number in it makes things any worse. > That sounds right. > > The purpose of the badge is to dilute your personal privacy and announce > your identity to those close enough to see. You can't always tell who is > looking at your badge. People who see your badge in more than one place can > infer that you have moved between places. If you don't want people to see > your badge, you can take it off. In RFID terms, that's what the Faraday cage is for. > The privacy concerns with badges seem very similar to the privacy concerns > of carrying RFID tags. > > I do not hear a lot of expressed concern about wearing a badge. It's more common to have a pocket available than a Faraday cage. Scott K