I see the rfid sachets for car keys, but do keys need to be fully encapsulated to block the signal from just 1 or 2 sides? For example could the wall the keys are stored on have something installed for blocking if the driveway is behind said wall?
In: Technology
this video will teach you everything you would want to know about blocking rfid https://youtu.be/_X6DVQH0Js0
the tldw version is, an rfid/nfc chip is powered by the reader. the reader only sends out a limited amount of power, any large conductive object near the card will absorbe some of this power. absorb enough and the chip cant be powered enough to send. it does not matter if the conductive material encases the device or not so long as it can absorb enough power
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