RFID has been used in stores and cars as a identification system for years. They seem to make life in general more efficient.
With RFID tags in Credit Cards, Passports, and drivers licenses coming out I started to worry. Soon there will be RFID tags in money. I guess that would help solve some of the poverty problems. RFID tags are also not very secure. When the first RFID passports came out in the UK the encryption on the chips was broken in under 48 hours!
RFID blocking wallets are for sale for ~$20 (http://www.difrwear.com/products.shtml). However these are a little unstylish(yes I know its not a word) and pricey for me.
So here I will show you how to make a RFID shielded wallet that doubles as a waterproof, tear proof, cool looking ducktape wallet, without spending a fortune.
We will use Aluminum foil as a to block the radio waves that power the RFID, like a faraday cage.
Step 1: Materials
You will need:
-Double sided Scotch(or similar brand) tape
Step 2: Make the Base
-Make 2 sheets of ducktape that are 19.5cmx16cm, sticky side up, by overlapping the strips of ducktape as shown.
-Cut 2 pieces of 17.5cmx14cm aluminum foil. Place them on each sheet of ducktape.
-Put 3 strips of double sided tape on one of the sheets of aluminum foil/ducktape.
-Put the two sheets together like a sandwitch sticky side in.
-Trim it so it looks good.
Your done with the base!
Step 3: Make the Money Pocket
-Fold the base in half like a hot dog (see picture) leaving about a centimeter of no overlap at the top.
-Tape the sides
Your done with the money pocket. Now we will add the change holder and the ID.
Step 4: Change Holder
-Take 2 pieces of ducktape one slight bigger than the other and place them together, sticky side in. The smaller one should be equal in size to half the wallet lengthwise.
-Take this a place it on the left side of your wallet.
Now for the ID holder!
Step 5: Make the ID Holder
-Fold a piece of packaging tape in half, sticky side in.
-Trim it so it fits on the left side of the wallet.
-Tape it in with small pieces of ducktape.
Step 6: Finishing
-Fold the wallet the way you would to put it in your pocket and place it under some books. Leave it there overnight.
All we have to do is test it!
Step 7: Testing
-Take your cellphone and place it in the wallet and call it while holding the top of the wallet closed.
If it doesn't ring the wallet probably works!