Patent ID: 9704087
Date: 2017-07-11
CPC Classifications: G06K

Claim:
1. An apparatus comprising: a cellular phone comprising a first antenna, an electrical filter coupled to the first antenna, and a radio frequency identification (RFID) device coupled to the first antenna via the electrical filter, wherein the first antenna is configured to communicate with an authorized reader in a frequency range, and the electrical filter is configured to filter frequencies outside the frequency range; and an RF shield comprising an electrically conductive, non-ferromagnetic material, wherein the RF shield is configured to prevent unauthorized transfer of data between a second antenna external to the cellular phone and the first antenna, and wherein the RF shield is further configured to attenuate only signals inside the frequency range passing from the second antenna to the first antenna so that signals passing through the RF shield within the frequency range are attenuated below an activation threshold for the RFID device.