Key Fob Security

I thought the last Gen 3 was a 2009 model !?

OOPS,I was thinking of a Gen 2 !

 

The ordinary cookie tin I'm using is quite effective, can take it within inches of the car and still no entry.

I made an earlier attempt with a locking metal key box that I lined obsessively all around the hinges and gaps with conductive foil tape. Never got it to be effective.

 

That's interesting -- the Faraday cage box I use has a mesh in it (Amazon seller sent one damaged, so they replaced it and I got to dissect the broke one). Supposedly the pitch of the mesh has to do with how much RF it can block (like how the see-thru perforated screen on your microwave oven door keeps the magnetron's RF in)... so the finer it is, the more effective for more frequencies. But if the can works but the metal box doesn't... perhaps the flat sides of the box are actually amplifying the signal instead of blocking it? And the open can's only leak is directly upward?

Guess some commo engineers will need to chime in; eager to learn why

 

For clarity, I don't use the cookie tin open. It has a reasonably tight-fitting lid, painted with green foliage and a floral wreath.