UglyViking
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I don't know the current design that RAM uses, but I thought that the keyfob only acted as a "response". Generally, the vehicle will "look" for a key when the door button is pressed. If it finds a fob that contains an allowlisted mac address, it will then attempt to verify the key by checking for it's signal strength, to see if it's within range.Newer Key Fob are/will be designed to stop emitting once they detect no movement (so they know you are not walking to your truck). That type of night attack will no be longer possible with these updated Key Fob.
But AFAIK, RAMs Key Fobs are still vulnerable.
Frankly, I could care less if the keyfob transmits when I'm moving or not, I'd actually prefer not to add yet another potential for complexity and failure, but rather wish they would get more serious with their security. Public/private keys and AES 256 encryption are functionally unbreakable, so long as they are built correctly. If they had rolling codes with public/private keys to validate and were using proper encryption they could send data over the air and even if a hacker was right there, they would never have the correct private keys to decipher the code.

