A salesman at a high end computer security firm want to sell you a proactive cover for your passport, which contains an RFID tag inside storing your...

A salesman at a high end computer security firm want to sell you a proactive cover for your passport, which contains an RFID tag inside storing your sensitive information. The salesperson's solution cost only $79.99 and protects your passport from being read via radio waves while it is in your pocket. Explain how you can achieve the same thing under $3.00