Power Amplifier theory about car burglaries

[walkitout]

The original Nick Bilton Style piece in the NYT has been picked up around the globe, not too many people offering up competing options for store-fob-in-freezer. Well, I ordered a couple blocking pouches (the sort of thing people put their phone in, or a passport, or one of those credit cards with NFC), and tested one by bringing a known working keyless entry remote near the locked car while in the pouch. The car wouldn't open. Presumably, if you store your keyless fob in a similar pouch when you aren't actually accessing the car/driving around in it, that would defeat any power amplifier based attack.

ETA: You might enjoy reading this description of an attack using wireless (and wired) relays.

http://www.isoc.org/isoc/conferences/ndss/11/pdf/2_1.pdf