RFID chips used for clandestine surveillance

Radio Frequency Identification of objects is possible not only by the well known RDIF tags:
but also by minuscule chips as shown below.

Digital Journal - World's smallest and thinnest RFID tag is powder made by Hitachi

Among the many applications of this technology there is also clandestine surveillance by tracking of property and people:
Nox Defense has released an invisible perimeter defense technology, which combines high-resolution video pictures and radio frequency identification (RFID) tags, sometimes referred to as "spy chips", to track assets and people in real time. The system tracks people without their knowledge and allows security officers to see a theft as it happens, even if concealed inside a briefcase, under a jacket, or stuffed inside a sock. The FBI is among early adopters of the Nox Intelligent Perimeter Defense system, though has not released details how it will use the system.
www.rfidwizards.com - Spy Dust Catches Thieves: FBI Says "No Comment"

  • The RFID readers can be hidden in an office building or warehouse, and the RFID tags can be placed on company products or property -- even on employee name tags or ID badges.
  • They can be scattered on a floor, so when someone walks through a room, entryway or warehouse, the tags will stick to their shoes or pants cuffs. When they walk past an RFID reader, it will be able to tell where they've been.
  • [...] someone from airport security could drop a tiny RFID tag into someone's bag or attach it to the bag. "I can't carry around something really obvious to mark the bag, but I can drop a tiny tag into the bag and then we'll be able to see where it goes,"
RFID tech turned into spy chips for clandestine surveillance

A system with a combination of RFID and High Resolution Video Surveillance Cameras is described Industrywizards.com:
The system uses video surveillance cameras mounted in obvious locations and others that are hidden. [...] A tag read in a particular location automatically triggers video recording and sends an instant alert to the security personnel’s mobile devices. [...] a single screen shot of the NOX Operations Center (below).
www.rfidwizards.com - New RFID Technology Allows You to be Tracked WITHOUT Your Knowledge
www.rfidwizards.com - Spy Dust Catches Thieves: FBI Says "No Comment"
RFID tech turned into spy chips for clandestine surveillance | Thought Criminal