3 ms·
Some half-baked ideas: - If the car was inductively powering the key, that might be harder/more dangerous to amplify. - The car or house could send a false ke
by Strilanc 11y ago
Some half-baked ideas:
- If the car was inductively powering the key, that might be harder/more dangerous to amplify.
- The car or house could send a false key signal, which would also be amplified, and refuse to open when receiving it. (New attack: lock rich people out of their car with 17$ of equipment!)
- If your house/public-buildings/phone+gps could track the key, they could tell the car to disable the system.
- Sending the signal with audio or visible light? Something that doesn't pass through walls.
- Use a pedometer to deactive the key when it's at rest.
- Use a really long key (like... 2 metres long) with transmitters at each end, use crypto and frequency hopping, and use multiple receivers on the car to triangulate both ends. If both transmissions are coming from the same spot, it's an amplifier.
- TheLoneWolfling 11y agoAnything to do with active disabling is easy to prevent via jamming. Inductive power isn't going to really help, I don't think. A false key signal, like you mention, won't help. Also, it'd be relatively easy to stop via a directional antenna. Audio does pass through walls. Visible light would be less convenient than a standard key, I'd think. Disabling the key while at rest would be really annoying for those who tuck it in their purses. A really long key... I hope you're joking.
- Strilanc 11y ago> Anything to do with active disabling is easy to prevent via jamming. Jamming is better than unlocking. Especially if you can fallback to the normal key. > A really long key... I hope you're joking. Obviously you'd have to do something clever with it. Turn it into a walking stick, sew it into clothing, have an anlket+earing combo, or etc. But, like I said, all the ideas were half-baked.