Chaos Computer Club
CCC (DE)|
Nr.130 |
RFID-Zapper |
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Category |
law & order |
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Group, Project |
Chaos Computer Club |
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Link |
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Nation, Target Area |
D, worldwide |
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Plan |
DIY action: tinker a fingerprint (a new identity) and/or a RFID Zapper |
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Size of the Group |
20 |
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Internal Issues |
workshop/handicraft booth (M) |
RFID-Zapper (DIY Workshop):
The RFID Zapper is an electronic device which can permanently deactivate passive RFID chips. In contrast to other methods (e.g. cutting the chip's antenna) the item to which the chip is attached will not be damaged (unless it is something that suffers damage from electrical fields).
The existing RFID Zapper prototypes are built using disposable cameras with flash. The flash is removed and the flash capacitor is connected to a coil. When the capacitor is charged and the circuit is closed with a switch, the coil produces a strong electromagnetic pulse. The field induces a current inside the chip which should be high enough to destroy it.
How to fake fingerprints? (DIY Workshop):
In order to fake a fingerprint, one needs an original first. Latent fingerprints are nothing but fat and sweat on touched items. Thus to retrieve someone elses fingerprint (in this case the fingerprint you want to forge) one should rely on well tested forensic research methods. Which is what's to be explained here.
A good source of originals for our counterfeits are glasses, doorknobs and glossy paper. The standard method of forensic research makes them visible: Sprinkling it with colored powder, which sticks to the fat.
Another solution involves Cyanoacrylat, the main ingredient of superglue. A small amount thereof is poured into a bottlecap, which is then turned upside down and put over the fingerprint.
The Cyanoacrylat gasses out and reacts with the fat residue to a solid, white substance.
The further treatment involves scanning/photographing and a bit of graphical refurbishment
The goal is to get an exact image of the fingerprint, for further use as mold, out of which the dummy is made. The easiest way is to print the image on a transparency slide (the ones normally used for an overhead projector) with a laser printer. The toner forms a relief, which is later used similar to letter press printing. Wood glue is suitable for producing the dummy.
A small dash of glycerene may be used to optimize humidity and workability. After thorough mixing, the dummy gets coated with a thin layer of the compound.
After the glue has dried, it is pulled off the foil and is cut to finger size.
Theatrical glue is used to glue the dummy onto the own finger.
The new identity is ready!