RFID Credit Card Protecter




About: I love diying everything i can.

These days credit card information can be taken from you by anyone with a RFID scaner. So lets MacGyver up a RFID signal blocker.

Step 1: Things You Will Need

You will need:

•Aluminum Foil or Copper Mesh (copper mesh is found in the glass of a microwave door)
•Playing Cards (2)

Step 2: Cut the Aluminum Foil

Take a pice of aluminum foil and set a card on one of the corners, then trace around the card. Do that 3 more times, then cut around it. Do that 1 more time.

Step 3: Fold the Aluminum

Fold both pieces of aluminum along the lines.

Step 4: Attach the Aluminum to the Cards

To attach the aluminum foil to the cards fold the edges around the cards.

Step 5: Tape the Cards Together

Tape the two cards together with the playing cards on the outside. Make sure that you dont tape the top, you will still need a side to put your credit card in.

Step 6: Information

1. The more aluminum foil you add the more amount of the signal will be blocked to a point, but copper mesh will protect it more than aluminum foil.
2. This will somewhat protect your card from people caring RFID scanners.
3. This will only somewhat protect a credit card if it has a RFID chip in the card. If the card does not have a chip than there is nothing for a RFID scanner to detect.

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    5 Discussions


    Reply 1 year ago

    Here is a pic of the RF ID symbol on a Credit Card. I hope this helps.

    Credit Card RF ID Symbol .jpeg

    Reply 1 year ago

    Most newer credit cards have them, on a visa card it has a little wifi symbol on on it and on other cards you will see a gold colored rectangle or square with lines on it.
    I hope that was helpful, I don't really know how else to explain it.


    1 year ago

    Well actually having made a skimmer I can tell you that just one piece of aluminium cut from say a coffee can seal will stop anything I have made yet.Just one piece in a wallet shields all cards by drawing the signal to the alloy sheet and the chips do not work

    1 reply

    Reply 1 year ago

    Thank you tytower for your response, your right but have you tryed Copper mesh. My thinking behind the Copper mesh was to turn the protecter into a Faraday cage to block the signals.