
Originally Posted by
Maetenloch
What they're doing is putting RFID chips into medicine bottles (probably the lids). RFID chips are low powered microprocessors with a small tuned antenna attached. When put in a radio field of the right frequency, the signal will charge up a capacitor enough to power the chip for a short period of time, usually just long enough for it to broadcast the few dozen bits of its unique ID. This transmitted signal is pretty weak, so the RFID chip has to be within a few feet of the receiver.
If you're worried about the id of your medication being scanned without your knowledge, just put your medicine bottle in a microwave along with a glass of water for about 15 - 30 seconds. The microwaves will induce enough current in the chip to fry it, and the water will absorb some of the excess RF energy. Voila, no more RFID.