RFID tags are all over the place. They're used in building access control systems, passports, inventory tracking . . . This instructable will show how you can use an Arduino and a few simple components (wire coil, transistor, capacitor, resistor) to make a device that can spoof an 125 KHz (low frequency) RFID tag. This is version 1, so there are many enhancements that can be made, but this version is stupid simple, yet it works. I did this in a few hours without much previous knowledge of RFID and without any fancy equipment (like a radio tuning hardware or an oscilloscope . . .I guess an oscilloscope is fancy, I need to pick up one of those).
UPDATE: Here is a link to an Arduino Mini shield based on these instructions http://wiki.smallroom.net/doku.php?id=terd:projects:rfidspoofer .
UPDATE: Here is a link to an Arduino Mini shield based on these instructions http://wiki.smallroom.net/doku.php?id=terd:projects:rfidspoofer .
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Signing UpStep 1: Parts
Parts:
*Some enamel coated solid core copper wire (I used the green spool from the 3 spool set Radio Shack carries).
*A NPN transistor, I used a 2N3904
*A 10 K Ohm Resistor
*A 10 nF capacitor (0.01 uF). I'm using a Metalized polyester film cap I got from Radio Shack, others should work though
*A toilet paper roll to wind the wire on
I tested my circuit using a Parallax RFID serial reader connected to a second Arduino
*Some enamel coated solid core copper wire (I used the green spool from the 3 spool set Radio Shack carries).
*A NPN transistor, I used a 2N3904
*A 10 K Ohm Resistor
*A 10 nF capacitor (0.01 uF). I'm using a Metalized polyester film cap I got from Radio Shack, others should work though
*A toilet paper roll to wind the wire on
I tested my circuit using a Parallax RFID serial reader connected to a second Arduino
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I understand the code itself is in 10 binary segments each with a parity bit but I'm unsure on how to work out the parity for it.
Thanks!
Don't bother, I went looking for it and found it in the Hacker's Dictionary:
spoof vi.
To capture, alter, and retransmit a communication stream in a way that misleads the recipient. As used by hackers, refers especially to altering TCP/IP packet source addresses or other packet-header data in order to masquerade as a trusted machine. This term has become very widespread and is borderline techspeak.
I don't have Radio Shack around here and don't want to order the wire set from them to Germany (shipping...). So I'm very, very interested in the wire's diameter (I'd love to see it in mm). Can you (or anyone else) tell me?
Thanks in advance!
Any help?
Thanks
My dog has a microchip (standard pet chip which is ISO RFID chip operating at 125khz inserted just under the skin between the shoulder blades) and I have fears we are being watched / recorded / studied due to this - and alot of the research Ive done on the subject has lead me to find lots of stories of tracking / tracing / research and other breaches of privacy due to these pet chips. I no longer agree with the idea of my dog having this "chip" active inside him.
I have enquired at my vet about removal, which is not possible and even if I found someone who would do it, due to his extremely small size, the anaesthetic needed to operate under is more likely to kill him, and he has a high risk of infection on the area - I will not put his life at risk - surgery is not an option. Is there anyway I can deactivate / destroy / disable the RFID chip, without injuring my dog?
PLEASE HELP
Thankyou so much for taking the time to read this,
We are seeing more and more agencies looking at these tracking devices. Isn't it funny how only 30 years ago when I was much younger they spoke of the mark of the beast, and we all thought, this is so goofy. Today, this is a reality. The difference today is that you have to allow yourself to be tagged. There are technologies that are available today, (two german scientists developed a few years back) that use a special radioactive material to mark things as small as a red blood cell.
using technologies like this a government or other agency could mark you without you even knowing it. Given this concern, the device in your dog is an antique and I wouldn't be too overwelled with concern over it.
There are much easier and non invasive ways that you can be tracked if they want to.
Good luck on whatever you choose and I hope this helps.
1) We cloak it from the sensors.
2) Scramble/confuse the signal.
1) Cloak:
You could use a jacket to block the signal, just like the wrapper used for the "FasTrak" metering for automobiles, or for your USA passport. It's just an anti-static bag, but a bit thicker than your normal bags for PC parts. Two layers of normal wrap would probably be more than sufficient. However, it's not a guarantee here.
It would be easy enough to fashion an "cloak/overcoat" for your pet, with some of this wrap inside it. I am sure your vet would be willing to test the feasibility of using the wrap before you put effort into making one or two overcoats for you pet. Have the vet "find" the chip, then hold the material over that area, and rescan.
Please remember, this jacket is being made coated plastic, so it could become quite warm while wearing such a coat. Imagine wearing a raincoat in the summer sun.... Check your pet for signs of overheating.
2) Scramble
Those of us who use RFID badges in our daily lives have found that having more than one badge in your pocket frequently prevents the "right" badge from working. Stacking a few badges atop one another, over the chip, could scramble the results. I am not a fan of the option though, as over time, those who are "interested" may validate their results and start seeing which pattern does occur when you pass their reader, and use that for tracking instead. the other big downside is that the chip in the animal can migrate within the body, so your badges won't be in the right place should the chip relocate itself.
Good luck!
@aloir - the range of these tags is very small, your pet will have to get to within less than one foot of a reader to be tracked.
@ToolboxGuy - there is no way that readers can cope with more than one tag in a field. There is no way that you can determine that there are two tags in a filed and get a pattern. The signals are rejected inside the reader. You could not make a reader to do what you feared. Your paranoia is a result of you not understanding the technology.
1) No, I am not paranoid, but thanks for *assuming*. I am only offering options, and I am not the person who believes they're being stalked.
2) The scenario is to track activity, so *any* signal is "accepted" and tracked. Most dolts could figure out if you always pass at 10am, and now all of a sudden you don't, you'd review what DID pass by at 10am, and verify it the next day, matching or non-matching.
3) Now that I look back on this, I wonder if this person is trying to cheat detection on a stolen animal, and does not want to be discovered.
No you can't track two tokens because the reader would not see them, it would regard them as noise, just the same as noise that happens all the time due to the working of the reader. There would be no "special event" to actually see and record.
The range of the tokens is less than a foot anyway so you normally have to present it to the reader. It is not something you can activate from a long way off. You can do this with some other cards but not the passive 125KHz tokens.
Nice thought isn't it? :)
On the other hand I assume that your totally meaningless rant means that you brain has already been taken over.
Yes I have, I have been an Electronic Engineer for over 40 years. I have subjected equipment to electro magnetic pulses in test chambers at approved test houses. I know that this project poses no danger to any electronic equipment because the fields it produces are tiny.
" I didn't think so. "
So wrong again.
1) This puppy has VERY high voltage and you must be careful when wiring it and fiddling around inside the HV circuits.
2) For God's sake.. keep any RFID based stuff you DON'T WISH TO DESTROY far away from this device. This includes some drivers licenses, passports, some credit cards. You've been warned
Or you can shield it around by mounting some sort of foil or other flexible metal mesh/sheet somehow onto the dog's skin. No better rapid ideas now :)
option(2): keep your dog at home/have your best friend doggysit him for the time you have to visit your boyfriend while cheating your rich CIA-employed husband ;)))