RFID's Can Be Disabled With a "Zapper"

From 22C3:

There are several ways to deactivate RFID-Tags. One that might be offered by the industries are RFID-deactivators, which will send the RFID-Tag to sleep. A problem with this method is, that it is not permanent, the RFID-Tag can be reactivated (probably without your knowledge). Several ways of permanently deactivating RFID-Tags are know, e.g., cutting off the antenna from the actual microchip or overloading and literally frying the RFID-Tag in a common microwave-oven, which needs to be turned on only for a short period of time. Unfortunately both methods aren't suitable for the destruction of RFID-Tags in clothes: cutting off the antenna would require to damage the piece of cloth, while frying the chips is likely to cause a small but potent flame, which would damage most textiles or even set them on fire.

The RFID-Zapper solves this dilemma. Basically it copies the microwave-oven-method, but in a much smaller scale. It generates a strong electromagnetic field with a coil, which should be placed as near to the target RFID-Tag as possible. The RFID-Tag then will receive a strong shock of energy comparable with an EMP and some part of it will blow, thus deactivating the chip forever. To keep the costs of the RFID-Zapper as low as possible, we decided to modify the electric component of a singe-use-camera with flash, as can be found almost everywhere. The coil is made from coated copper wire and placed inside the camera exactly where the film has been. Then one end of the coil is soldered to the camera's capacitor, from which we earlier disconnected the flash. The other end of the coil is soldered to a switch, which itself is connected to the capacitor's other terminal. Once everything is tested, the camera can be closed again and henceforth will serve as a RFID-Zapper, destroying RFID-Tags with the power of ordinary batteries.