| 摘要 |
Systems and methods for protecting radio frequency identification cards from unauthorized interrogation are provided herein. In some embodiments, the system includes a card having a first card portion, second card portion, and a spacer located between the first card portion and second card portion, each of the first and second card portions having an inner surface and an outer surface. A logic and memory chip is affixed to the inner surface of first card portion. An antenna is connected to the chip. The antenna has a gap that cause the antenna to be electrically discontinuous thereby making the chip inactive to interrogation. A spring-like member that has an electrically conducting portion is positioned in proximity to the gap in the antenna. The spring-like member can be selectively moved substantially across the gap to complete an antenna circuit and make the chip susceptible to interrogation.
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