rfid's They could easily be tied into your personal information, anytime you use your credit card it could be tied to this type of item, the rfid works off of uv radiation anytime it was exposed to light it could be tracked via satellite. Even in many stores at the malls which have electronic devices you pass through (supposedly anti-theft) they send your information to a computer that records your credit cards including your available balances, this is one reason why there is this metal chip in money as well the stores read this they can tell how much cash you are carrying with you, and why you may ask would they want to do all this? government power, at some time our government will outgrow us and not need us anymore when this happens through some kind of world wide taxation the american people will be an expendable commodity, when more and more rediculous laws are past and you refuse to do things like take implanted chips so we can have a cashless society at that time it will become a felony not to do so and they need to know where to come and pick you up.,,,