"We use it for positive ID... I could have a reader at the exit to tell where you've been in my building," said Brown. "Imagine you're working [with the government] in a drug lord's house in Columbia. You sprinkle it on the floor boards. It gets on their shoes. When they come through customs, there could be RFID readers on the floor mats. It would show that you had been in this drug lord's house. With this, you can figure out which place they visited and what RFID dust stuck to their shoes. It creates data points for you to make decisions. "

Brown also said that 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," he added. "If I'm a CIA guy operating in Columbia and I put a tag in a bag and it ends up in New York, that information might be useful to me."

He noted that the FBI is one of their dozen or so customers. The FBI did not return calls to comment on whether or not they use the technology, or how they might be using it.

When asked about privacy issues or someone using the surveillance technology for malicious intent, Brown said it's not a concern.

"We're all pretty trackable to begin with. Anyone who has a cell phone can be tracked. If you have a cell you're giving off a signal at all times," he added. "The thing about it is if you're living a clean life, there's nothing this stuff is really going to do to you. If you're not doing anything illegal, this isn't going to catch you. Is RFID going to catch you stealing? Absolutely it will."