[HN Gopher] Jamming Attacks and Anti-Jamming Strategies in Wirel...
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Jamming Attacks and Anti-Jamming Strategies in Wireless Networks
Author : adulau
Score : 60 points
Date : 2021-01-05 10:45 UTC (1 days ago)
(HTM) web link (arxiv.org)
(TXT) w3m dump (arxiv.org)
| tristanperry wrote:
| An interesting research paper, thanks for posting it.
|
| I've recently been fairly interested in smart homes, which
| (alongside WiFi) often use ZigBee and/or Z-Wave protocols.
|
| Whilst Z-Wave isn't covered in this paper, ZigBee (which runs at
| 2.4 Ghz - but on higher channels than WiFi to prevent overlap) is
| covered. If I'm reading correctly, the paper seems to say that
| many anti-jamming techniques are successful with ZigBee, unlike
| previous research that concludes that it's usually harder to
| block ZigBee jamming attacks (ref 21)?
| red0point wrote:
| Funny, I just finished my master thesis in this area. I
| implemented a highly effective DoS attack for LTE which relies on
| reactive signal overshadowing, a very efficient type of jamming.
| Sadly, overshadowing attacks in LTE are not covered in the paper,
| but have been present for some years now.
|
| Here's the link if anyone is interested:
| https://doi.org/10.3929/ethz-b-000455834
| capableweb wrote:
| A little bit off-topic but still relevant to jamming. I noticed
| the other day I went to a big electronics store (Mediamarkt) and
| noticed that my cellular connection died just as I entered the
| store. When asking about it, they told me the reception is just
| so poor there so I should use their WiFi instead. As I wanted to
| compare products with other stores, I used the WiFi.
|
| But afterwards I started thinking, is it possible to store is
| doing this on purpose, in order to ex-filtrate data via the WiFi
| connection? They wouldn't get more than the hostname if it's over
| https, but who knows what more kind of data they could get from
| it. They could also block websites of competitors and blame the
| internet, and prevent consumers from comparing themselves.
|
| Or I'm just a conspiracy-nut lite, but it wouldn't surprise me a
| lot if it was like that.
| hchz wrote:
| Can a business model of capturing hostnames pay for the initial
| and ongoing costs of such a system? Isn't this kind of wireless
| hardware expensive at the scale of a business like this?
|
| https://en.wikipedia.org/wiki/Hanlon%27s_razor
|
| I might expect that kind of activity in the US but not the EU.
| buran77 wrote:
| One of the big problems many of these stores have is that the
| mobile coverage actually is bad inside due to the building's
| structure. Many of them are reinforced concrete buildings
| wrapped in metal cladding (take an IKEA store as an example).
| So many larger supermarkets in some countries barely have
| coverage at the cash register so you can pay with a phone but
| you'll lose coverage as soon as you enter further. They
| mostly don't offer any solution for this, like WiFi APs or
| mobile base stations. There's also the much higher density of
| people at that spot which crowd the same base station.
|
| I'd wager MediaMarkt faced the same issue, wanted to give
| some internet coverage, and found WiFi to be cheaper or
| easier to implement and maintain. They may have realized in
| the meantime that they can extract some useful data too.
| PaulHoule wrote:
| in the US Target cooperates with cell phone carriers to
| disable service in their stores.
| metiscus wrote:
| I am really interested in this.. Do you have a source?
| [deleted]
| myself248 wrote:
| It wouldn't surprise me a bit. Find some hams and head back
| there with a spectrum analyzer. (Or get yourself a $25 rtlsdr
| dongle...)
|
| There've also been cases of hotels sending deauth packets to
| other people's wifi hotspots, to force them to buy the hotel's
| wifi. Multiply that times a hundred vendors trying to run
| verifone terminals and stuff in a merch room, and it's a huge
| money grab.
| swirepe wrote:
| It's more likely that the big metal walls of store were
| blocking the signal, instead of intentional jamming. They
| could, of course, take advantage of that to get people to
| connect to your wifi. That tells them at least how many people
| were in the store, and when.
| vuln wrote:
| You're not crazy... Amazon patented it.
|
| https://www.theverge.com/2017/6/15/15812986/amazon-patent-on...
| devwastaken wrote:
| After the target hacks stores started to install cellular
| suppressors. Some removed them because it turns out that's a
| bad idea. Some did not. Source: used to work with a friend for
| hardware deployment at stores.
| frakt0x90 wrote:
| Would it also be possible to estimate your location in the
| store using multiple access points and the latency between
| them? They might use that to track where people spend their
| time.
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