How to Make an Aluminum Foil RFID Shield

By Mike Venture

RFID (Radio-Frequency Identification) chips can now be found in many places such as passports, credit cards and ID cards. While the information on these chips is almost always encrypted, you may feel uncomfortable walking around with them, as the encrypted information may be obtainable by anyone with the proper equipment. A thin layer of household aluminum foil will provide an effective, though not impenetrable, shield from RFID-reading devices.

Things You'll Need

  • Duct tape
  • Scissors
  • Marker

Step 1

Unroll and tear off a sheet of aluminum foil, approximately 1 foot in length. Place the sheet on a clean table or countertop.

Step 2

Fold the sheet in half. Place the item to be shielded on the folded sheet.

Step 3

Use a marker to draw a line encircling the item, leaving a small gap between the edges of the item and the line.

Step 4

Cut along the line with the sheet still folded to create two identical aluminum foil cut-outs. Cover both sides of each cut-out with duct tape. This will prevent the foil from tearing.

Step 5

Put the cut-outs together. Wrap duct tape around three edges to form a pouch. Slide the item into the pouch and it will be shielded from RFID readers.