タグ別アーカイブ: wifi

So now that thief’s are using WiFi jammers that apparently can be bought for $40, what is everyone turning to to protect your property?

News of break-ins these days show quite a few security camera captures, but in many of them the perpetrator is covering their face. So ultimately I’m not so sure how much security cameras (even wired ones that capture clear images) can really protect a property.

It appears even traditional alarm systems would be disabled by a signal blockers since all the sensors’ signal would be blocked as well.

I have NEVER considered a WiFi connected device to be any sort of serious security device. For a serious security device, it needs to be wired (power and data), and the video recorded locally with serious backup power (no, a 15 minute UPS does not qualify). I do have what would likely be considered a Pro-sumer level video camera system, with hours of backup power.

With that said, I have over 40 Wyze cameras, and I do use them regularly as they are quite a bit less expensive than my wired system, and the software is more convenient for a quick look remotely.

Two of the most common attacks are a simple broadband signal generator and a specific WiFi De-Authentication. In the case of the first, the jammer simply broadcasts a strong enough signal that the intended signals are covered in noise. An audio example would be trying to talk back and forth with someone 100 feet away in an empty stadium. That would likely work fine, but now add 50,000 other people and there is so much noise that the person 100 feet away can not be heard. A broadband jammer is a quite simple device.

A De-Authentication attack is an smart device that to keep this simple, impersonates the WiFi client and sends a command to the WiFi access point telling it that the client is disconnecting. Note that WPA-3 prevents that by encrypting the management packets. However although the WPA-3 standard has been out for quite a few years, most IoT devices do not support it.

Both of these attacks happen between the WiFi client and access point, so a firewall or anti-virus never get involved.

A resident of the town of Messanges in southwestern France could spend six months behind bars after unwittingly taking down telephony and mobile internet services in his neighborhood with a signal jammers.

Surprisingly, though, his actions were not malicious. He only wanted to prevent his teenage kids from using their mobile devices to go online after bedtime.

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According to the French planning and radio frequency management agency (ANFR), a local mobile phone operator filed an unusual complaint this month – just before midnight and until 3 AM every of the week, the residents of Messanges could not use their cellular and mobile internet services.

Following an investigation, the ANFR determined that a signal phone jammer, a device prohibited in many European countries including France, was blocking radio frequencies in the area.

Around 1:30 am, a technician traced the source of the signal to a residence in the coastal town. The next day investigators, accompanied by police, knocked on the door of the man, who immediately admitted he was using a multi-band jammer.

“The gps blocker had been installed by the father of the family to prevent his teenagers from accessing the internet with their smartphone instead of going to bed,” the ANFR explained. “His children had indeed become addicted to social networks and other applications, in particular since the confinement imposed due to Covid-19. After consulting forums on the internet, the father decided that a jammer was the best solution to put an end to his kids’ excessive screen time.”

On top of possible jail time, the illicit possession and use of a jammer bring a financial penalty of up to €30,000.

“The ANFR agent, in addition to demanding that he turn off the wifi blocker and no longer use it, reminded the owner of the equipment of the regulatory framework,” the agency added.

The man also had to pay an intervention fee of 450 euros.