I would like to prevent criminals from stealing the data on my cards, and from intercepting that data as it is transmitted. What kind of material could I use to protect my personal and account information?
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RFID transponders in credit cards are designed to be very short-range (only an inch or two) to prevent criminals from stealing information on the cards, or from intercepting data being transmitted wirelessly between a card and a reader. As such, it would not be possible for someone to read the information from your credit card without being very close to your wallet or purse.
In addition, the RFID transponders in credit cards have additional security features that make it difficult for criminals to use data stolen wirelessly from a card. That being said, if you wanted to, you could use aluminum foil from your kitchen, or Mylar or almost any other metallic material, to block a reader's energy from reaching a transponder and gathering information from it.
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