$17 radio amp lets thieves steal Priuses

There’s a huge issue with Range Rovers in London with this. Thieves just walk up and take them like candy.

It’s a bother. I had three on order (diamante, gold, silver, bronze), and told RR to forget it until they fix the issue.

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Have TWO bananas!

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My work sends me.

So did mine… until the TARP fiasco cost them 70 million dollars (that’s not a random, exaggerated number). Now there’s two offices instead of five, and hundreds of working class people lost their jobs, and I don’t get to go to Defcon any more.   :crying_cat_face:   But at least the banksters can keep baby in fresh minks, amirite? Gotta keep things in perspective!

G’night, all.

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Matter of the antennas and low-noise amps. GPS sats transmit at less than 50 watts from 20,000 km away. The Voyager probes are even more extreme example, both of the distance vs signal strength, and the antenna/amp combo at the receiving end.

And the Medievalist’s example of the Bluesniper, too.

In couple weeks/months, as time allows, I should do some measurements of the Bluesniper/wifi “warcouching” nature, with my 30 dBi monster of an antenna I got as a gift couple years ago… then I’ll have some actual practical experiences.

This is not news. Someone may “drive off” with the car. But they won’t get far: after a quarter mile or so the car will stop unless it detects the fob. So unless the fob code can be readily sniffed and duplicated at range, this doesn’t mean much.

People building high gain antennas on reverse-engineered frequencies generally have infinitely better economic prospects elsewhere - much greater rewards for much less risk. People break into cars because they’re kids or junkies seeking some snatch-and-grab to pawn. People trying to steal the actual car have easier methods than trying to spoof the key. (Are there any reports of amplifier boxes actually getting the ignition started - on ANY model of car, ever? (I’ve not yet found any))

I’d love to see a write up.

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There will be one. First I have to make a tripod adapter that could carry the weight of the whole dish and its counterweight. (And possibly make a massive enough tripod as the cheap plastic one may prove to be too weak. Nothing that can’t be done with a bit of welding and square tubes.)

Then, optionally, a motorized pan-tilt head. That one requires quite some thoughts yet. Simple in principle, but has to take in account the inadequacies of my shop. Possibly a lightweight one for panorama photo or thermal cam scanning, lasercut from acrylic, as a proof of concept before.

Then use a suitable receiver - a wifi dongle, a bluetooth one, and/or a downconverter for RTL-SDR dongle to operate on raw signal. (Too narrowband for wifi, but can see other stuff that is not visible there. Maybe a signal splitter and feed all of them?)

That said… what about some kind of opensource SIGINT database of RF signatures? Something like the ones at the bottom of this image, possibly in 2d (spectrum vs time)?

Also, related to signatures, ear is a pretty sensitive analyzer for certain kinds of signals. Things can be recorded to a .wav file, e.g. from an oscilloscope (which can readily cough the sampled data out over usbtms), and then played at an appropriate samplerate as sound.

Such a database would be extremely cool. I just started getting into SDR, picking up a shielded NooElec unit (and have a HackRF clone on its way from Indiegogo). I don’t have any radio background so it is all learning.

I agree. Would be nice crowdsourcing one…

Databases of RF signatures are a staple of SIGINT. And not only the qualitative, device-class kinds; e.g. warship radars have characteristic “accents”, as each tube (and the attached components) is slightly different. The heating of its inner components during transmitting the pulse introduces unintended amplitude, frequency, and phase modulation that is characteristic for the given radar unit, at least until the tube gets replaced.
(Similar signatures can be observed in e.g. Morse code transmission of individual operators. The old method used to be recording the signal on a photographic film, then analyzing visually.)

(…also, why all the war story books are from the perspective of troops or pilots and there’s such dearth of SIGINT/ELINT stories? Grumble…)

I got just a lousy $10 DVB-T dongle. Unshielded, with stock crystal, with a spike in the middle of the spectrum, but good enough for the price. Would love the HackRF thingy but it will have to wait for later.

Aren’t we all beginners? :smiley:

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There’s one place already selling “military spec” car key faraday cages for this exact purpose: http://www.carkeycage.com

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