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I've heard that you can disable RFID readers (not tags, readers) with an appropriately-resonant coil and an EMP circuit.

I'm not sure if the same can be done to tags, but considering the size of the tiny electronics, and the fact that they are manufactured under the assumption they'll never need to be touched (aka, no CMOS spike tolerance), it might be trivially...

...wait. I just remembered about RFID alarm barriers in retail stores.

Well this is annoyingly difficult to discuss, then...

Indeed you can, from a disposable camera flash circuit[1]!

Though I concur, might be used for evil purposes, couldn't resist posting this. I just love disposable cameras hacks.


Ah, very interesting. Thanks for the link.

>> Well this is annoyingly difficult to discuss, then...

Why? Is there a law against public discussion about how to disable an anti-theft device or something?

Okay, not really - but it can be tricky to know where to draw the line. I guess I was uncertain.

I draw the line where actions are taken. A discussion is not an action. Using a device illegally is, like for instance pulling the trigger of a gun with the evil intent of murder, or taking something that isn't yours.

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