keyless entry
Matthew Born (mborn@brynmawr.edu)
Thu, 27 Feb 1997 10:30:27 -0500
The keyless entry systems that work from some distance are AM tranmissions.
The downside to these is that the bandwidth is easily picked up by bad guys
equipped with sniffers half a block away. They can then walk right up to
your car and unlock it. The infrared devices, like those used on Peugeots,
seem to work from, oh, about the driver's seat, but these are nearly
impossible from which to steal signals. Like those "learning" master remote
controls used in the home, you have to be standing directly in the beam
pattern to intercept it. And since Peugeot remotes seem only to work when
you're already actually inside the car, the thief would have to be sitting
on your lap to rip off the signal -- at which point you're in a fair bit of
trouble already.
Some of the newer AM systems actually change their frequency every time you
use it. Obviously, this is Voltaire's keyless entry of choice. If you're
putting in an aftermarket system, and you live in the big city, I'd check
into this feature.
Matthew Born
89 505 wagon with water in the oil, oil in the water, and some of both on
the ground. Sigh.