Re:Tesla Plans to Open Car Doors to All Hackers This Summer
by anu7df on Tuesday April 28, 2015 @01:05PM
(#9453751)
This is more of a question . Is it not possible to "listen" for your reflected (there will be some always right?) search pings, and conclude that there is some amplifier attack happening if the signal is much stronger than usual. Even if there is no signal reflected usually, wouldn't this amplifier be more or less omnidirectional (they don't know where your key is right now). If so, a stronger than expected "reflected" ping can still be recognized. What am I missing?
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Re:Tesla Plans to Open Car Doors to All Hackers This Summer
by TheLoneWolfling on Tuesday April 28, 2015 @01:07PM
(#9453774)
You can relatively easily set up an amplifier with a directional antenna. Also, that will easily false positive - there are a lot of things that reflect RF in weird ways.
Re:Tesla Plans to Open Car Doors to All Hackers This Summer
by anu7df on Tuesday April 28, 2015 @01:17PM
(#9453823)
A lot of things will reflect RF in weird ways, and that is precisely what I was counting on. Surely an amplifier that changes the detection range from 1 feet to 100 feet will be emitting much much higher energy than what is usually experienced under normal operation. I guess, the antenna does not have to be omnidirectional as long as the attacker can search around the direction the key is likely to be.