How # # block RFID signals, detector # # Build a RFID reader, RFID tags and make

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How # # block RFID signals, detector # # Build a RFID reader, RFID tags and make
by jokerphd
RFID chips are everywhere. They’re in passports, credit cards, and plenty of items you purchased in the last 5 years or so. Large retailers like Wal-Mart began using RFID tracking products already in 2004, and today are used in everything from mobile payments to hospital records systems. Chances are, unless you’re a hermit (in which case you would not be reading this anyway), there is an RFID tag within a few feet of you.

Why this topic? Because most of these labels are passive, meaning that they are activated and deactivated based on the presence of RFID readers, which are also everywhere. Readers track the motion of tags. They are also used in things like mobile payments and transportation systems. A passive tag only has to come within a certain distance of a reader to be activated and read. Active tags are even more frightening, as they have their own power supplies and can be read

That said, it’s likely that the shirt you bought online last week is not keeping track of what stores you visit and transmitting information back to that marketers can target ads to you, but the fact it is even possible is absolutely terrifying.

The good news is there are some things you can do about it. There are ways to block signals and disable the chips, and you can build a device to detect RFID readers with relatively simple parts, or experiment with making a custom yourself chipping. It is worth noting that due to how widespread RFID is that these measures alone will not fully protect you all the time, but it certainly can not hurt to protect yourself where you can.

RFID Blocking signals
You can block the signals that are transmitted to and from the RFID chips with metal, and almost any type will work. You could wrap all your stuff in foil, but if you want to be a little smarter about it you can buy wallets with RFID protection or even make your own.

Disabling RFID chips
The fastest and easiest way to destroy RFID chips is also the least practical: 5 seconds in the microwave will melt the chip but is also likely to destroy your microwave.

The best way is to drill or cut the chip and the antenna with something sharp, but to do that you have to know exactly where you are. You can also just take a hammer to it. Maybe not ideal, but will do the job.

The construction of a RFID reader
With some basic pieces such as cardboard, LEDs, copper tape and a capacitor, can make a device that lights up when a RFID reader is close.

First, the copper strip 3 or 4 times around one end of the carton, each corner weld runs.

Then connect the LED and capacitor, and you have your detector reader.

Custom RFID Tags
You can build different types of RFID tags to do different things, like turning daylight and off in the dark …

Or activate when someone touches it.

Check out Instructables user nmarquardt tutorial for details.

RFID is not all bad. Despite its drawbacks, it can actually do interesting things with it. You can create animated 3D LED or maybe build a strong beer.

What do you think of RFID? Is it too vague, or is the convenience of making payments with your iPhone worth it?


How to Block RFID Signals, Build an RFID Reader Detector, Custom RFID Tags and Make ‘Hacks, Mods & Circuitry.

jokerphd | January 15, 2014 at 17:32 | Categories: Uncategorized | URL:
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