Signal Jammer Tech

A small surveillance drone flew over the Austin stadium, diligently following a series of GPS waypoints programmed into its flight computer. On the face of it, the mission was routine.

Suddenly, the drone veered sharply off course, deviating from its intended flight path and hurtling east. After a few minutes, when it was clear that something was seriously wrong, the drone made a sharp right turn and headed south. Then, as if some ghost had ordered the drone to self-destruct, it hurtled toward the ground. Just a few feet from some kind of disaster, a safety pilot with a radio control device saved the drone from crashing into the scene.

On the sidelines, there were smiles all around about the near-disaster. Professor Todd Humphreys and his team at the University of Texas at Austin's Radionavigation Laboratory have just completed a successful experiment: closing a hole in the government's plan to open U.S. airspace to thousands of drones.

They can be turned into weapons

Spoofing the GPS receiver on a drone is just another way to hijack a plane

In other words, with the right equipment, anyone can take control of a GPS-guided drone and make it do whatever they want.

Spoofing is a relatively new problem in GPS navigation. So far, the main problem has been GPS jammer device, which are easily available via the Internet and used by people to hide illegal use of GPS-tracked company vans, for example. Iran is also believed to have shot down a US spy drone in December by jamming drone its GPS, forcing it into automatic landing mode after losing direction.

"Tricking the GPS receiver on a drone is just another way to hijack a plane." Todd Humphreys, a researcher at the University of Texas Radio Navigation Laboratory

Cell phone jammer can cause problems by disrupting GPS signals, while spoofers are a huge leap forward in technology. They can actually manipulate navigation computers with false information that looks real. He used his device - what Humphreys says is the most advanced spoofer ever built (which costs just $1,000) - to infiltrate the drone's GPS system and send out a signal more powerful than those coming from satellites high in Earth's orbit. .

Initially, his signal matched that of the GPS, so the drone thought there was nothing wrong. That's when he strikes - sending his commands to an onboard computer to get the drone to follow his lead.

Mr Humphreys said the impact was severe. "Within one to three years, the airspace will have 20,000 drones," he told Fox News. "Every one of them could be a potential missile aimed at us."

Drones have been widely used in places like Iraq, Afghanistan and Yemen, but so far GPS-guided drones have been limited to battlefield or southern border patrols and have not been allowed to fly widely in U.S. airspace.

Under pressure from the Pentagon and drone manufacturers, Congress ordered the FAA to write rules allowing government and commercial use of drones on U.S. soil by 2015. The plan could eventually see police drones spying on U.S. cities, drones monitoring power company transmission lines, or GPS-guided freighter-sized drones delivering packages across the country without a driver. FedEx founder Fred Smith said he hopes to add drones to his fleet soon.

The new rules have raised privacy concerns about a "surveillance society" where drones tirelessly monitor our every move 24/7. But Humphreys' experiment puts a whole new spin on anxieties about drones.

"What if you could shoot down one of these drones delivering a FedEx package and use it as your missile?" It's the same mentality as the 9-11 attackers."

This is something the government is acutely aware of. In the deserted desert of the White Sands Missile Range in New Mexico, officials from the FAA and Department of Homeland Security watched Humphrey's team constantly take control of a drone from a remote mountaintop. The results were as dramatic as the test at UT Stadium a few days earlier.

The Department of Homeland Security is trying to identify and mitigate gps jamming with its new Patriot Watch and Patriot Shield programs, but the effort is poorly funded, still in its infancy, and mostly aimed at finding people using jammers rather than spoofers.

The potential consequences of GPS spoofing are simply chilling. Humphries warned that terrorist groups could match his technology and wreak havoc in crowded U.S. airspace.

"I'm afraid they're going to crash into other planes." "I'm worried they're going to crash into buildings. We could have a collision in the air and there could be casualties, so we want to prevent that from happening and fix it."

Unlike military drones, which use encrypted GPS systems, most drones flying over the United States will rely on civilian GPS, which is not encrypted and can be easily infiltrated. Humphreys warned that the government needed to address the loophole before allowing drones widespread access to U.S. airspace.

"It just shows the mindset that we had after 9-11, when we reinforced the cockpit doors to prevent people from hijacking airplanes - well, in terms of the navigation systems of these drones, we need to adopt that mindset."

The EMP generator generates an electromagnetic pulse to disrupt electronics

U.S. Customs and Border Protection (CBP) officers in Wisconsin recently seized a slot jammer device while inspecting a shipment from Hong Kong.

CBP officers made the discovery at the Milwaukee port of entry on Feb. 4, CBP said in a press release.

Electromagnetic pulse (EMP) devices are banned by the Federal Communications Commission and are used to "interfere" with the inner workings of slot machines.

According to U.S. Customs and Border Protection, an EMP generator generates an electromagnetic pulse that can disrupt electronic devices at a range of about one meter. These devices typically send an electric current through a magnetic field via a magnetic copper wire.

Border Patrol agents in Arizona have shot dead Mexican migrants at the US border

CBP said the shipment was a car adapter from an electronics supplier in Hong Kong and was headed to a home in Mossini, about 175 miles northwest of Milwaukee.

"There are a variety of ways these tools can be used," LaFonda D. Sutton-Burke, Chicago's director of field operations, said in a statement. "Federal law prohibits such cellphone jammer because they can be used to interfere with radio communications, cellular phones, GPS and other communications devices."

CBP officers at the Port of Milwaukee Express Consignment Operations facility examined the shipment and sent it to the Mechanical Engineering Division at FBI Headquarters for further analysis.

Some people fear that cell phone jammers could disrupt phone service for law-abiding people close to prisons. However, modern jamming technology can be narrowly targeted to minimize disruption to people outside of prison walls.

It’s time to fix the federal regulations that prohibit jamming device technology and give prisons the tools they need to fight contraband.

Installing jammers in prisons would turn inmates’ cell phones into paperweights, disrupting their criminal networks and drying up a major source of contraband.

Risks of GPS Dependence

Overreliance on GPS signals is rampant in day-to-day life from data networks, financial systems, health networks, rail, road, aviation and marine transport, to shipping and agriculture. Military platforms commonly use GPS to find their position, navigate and execute missions.

With different systems sharing GPS dependency, a loss of signal could cause the simultaneous failure of many things people rely on daily.

The European Commission estimated that six to seven percent of its countries' GDP, representing a whopping $1 trillion, is already dependent on satellite radio navigation in Europe alone.

BAE and Lockheed are not alone in their efforts to develop better, more robust systems. Other countries have developed their systems, including Russia's GLONASS, the European Union's Galileo system, and China's COMPASS.

Another related issue is the use of GPS. The FAA has been working to upgrade aging radar-based systems with GPS networks for air traffic control and positioning. It should improve safety and pilot awareness. But GPS signals are notoriously vulnerable to disruption: They're relatively weak to begin with, using just 25 watts to send signals from satellites that are roughly 12,500 miles above the Earth. It's so easy to block such signals that GPS jammers are sold online for $30.

Simply allocating specific radio spectrum to particular devices does not entirely solve the problem either. A recent example is LightSquared, a company that wants to build a network of 40,000 towers across the country to deliver broadband Internet access using the 4G LTE (Long-Term Evolution) wireless data protocols. The company wants to use a frequency spectrum near the existing GPS L1 band. (Consumer GPS devices typically rely on L1 signals, in the 1575.42 MHz wavelength.)

Protecting Your Privacy: A Guide to Avoiding Drone Surveillance

It's hard to know who owns a drone; some cars have a visible registration number, usually in case the owner forgets.

I watch the drones in the sky with my eyes

I was swimming in the backyard pool one day when I heard a familiar hum. Sure enough, a drone was circling overhead, which disappeared shortly after I flicked it away with my hands. This is where my idea for writing this article came from.

The legality of drone surveillance varies by country and state, but if a drone is flying over your private property and recording you without your consent, call the police. This is an invasion of your privacy.

It's hard to know who owns a drone. In my case, it flew out of sight within seconds. If I had my iPhone within arm's reach, I'd snap a photo of the drone. Some drones have a visible registration number, usually to prevent the owner from forgetting it.

Things You Should Never Do to Drones

There are some effective and perfectly legal ways to avoid surveillance. There are also ways that are illegal for ordinary citizens.

The FAA legally protects drones from:

Shooting: Shooting into the sky is dangerous and illegal. Just don't do it.

Physical Interference: This includes lasers and other objects.

Disable or otherwise tamper: Using blockers and hacking is a crime.

Now that we've got that out of the way, here's what you can do.

Use your surroundings as cover

Own a drone or know someone who has one? I bet you've been in a situation where someone threw something at it. This is not the right way to avoid drones.

You should take a more reactive approach. In bad weather — heavy rain, fog, and high winds — it can be difficult for drones to fly or get great footage. To rate you.

When the weather is nice and you see drones buzzing overhead, find a place where they are less likely to spot you. Trees, alcoves, awnings, and tunnels are all great places to hide when drones pass by.

The Jalisco, Mexico-based CJNG, led by drug lord Nemesio Osegra Cervantes, wears cell phone jammer on its uniform and "employs Middle Eastern terror tactics" by targeting crowds with drones .

They are using drones "to drop bombs on rival cartels and the Mexican Armed Forces."

"They use cell phone wifi jammers to stop these attacks. They use them to stop people from calling for help or calling family when they're kidnapped. They also use them to conduct very sophisticated maneuvers on the battlefield, where they can cover up," Logan said. "They can cover their lines, they can cover their attacks, they can cover their exits -- the way they exit the situation. It takes a lot of training and it's a real threat."

Proliferation of wireless signal jammers

Communications jamming technology is falling into the hands of paramilitary groups and criminals

Our society is increasingly dependent on wireless technology. We wake up in the morning, check email via WiFi, unlock and start the car with the keychain in our pocket, and use our cell phones to make important calls on our way to work. When we go to a new place, we rely on GPS to guide us. Stolen or misplaced items can be located via LoJack or wireless AirTags. On a larger scale, much of our military and civilian infrastructure depends on wireless communications. Unfortunately, these signals are vulnerable to another type of wireless device: signal jammers.

In general, jammers simply disrupt existing wireless signals by flooding them with noise. By adjusting the jammer to a specific target frequency range and emitting a high-power noise, tone, or pulse, the jammer can interfere with nearby receivers trying to listen for that frequency. Traditionally, this has meant interfering with radio communications, but the same core principles apply to other types of wireless signals - cellular, WiFi, Bluetooth, GPS, and so on. Jammer ranges vary depending on the power and size of the device; In urban environments, small handheld jammers may be effective at a range of 100 meters or less, while large military-grade jammers can be installed in locations that easily cover hundreds of miles of open terrain.

Military and paramilitary uses of signal jammers

Jammers were widely used during World War II, when the Nazis jammed Allied radio transmissions in occupied Europe, and only became increasingly popular during the Cold War. The Soviet Union and China jammed incoming signals, Cuba blocked American radio stations, and North and South Korea jammed each other's transmissions. Signal jammers are still widely used as a component of electronic warfare (EW), especially by the Russian military. Russia reportedly used the technology to interfere with U.S. low-altitude surveillance drones during the Syrian conflict in 2018; It is unclear whether this caused them to crash or simply go off course. There have also been reports that Russia has used powerful gps blocker on its eastern border, causing Latvia's phone system to go down and planes in the area to lose GPS signals.

Without further ado, jammers have become a very popular tool among Mexican drug cartels. They appear to go hand in hand with another technology adopted by the cartels: drones.

Small commercial drones have been used to monitor territory, especially at night with the help of thermal cameras. They are also weaponized and can drop explosives on targets, a tactic previously used by the Islamic State and other terrorist groups in the Middle East. As a result, cartel members wear portable signal jammers that can interfere with nearby drone uplinks as well as cellular and radio communications.

Civil black market and criminal use

At this point, you might be thinking, "I'm not a high-value military target or part of a warring drug cartel, so I don't have any reason to care about gsm signal jammer." However, this is not the case. Signal jammers are cheap, easy to use, and available online at any time to people who know where to find them. They can affect your daily life in a number of ways - veteran surveillance device maker Tiny Transmitters has posted some surprising demonstrations on Instagram to prove it.

The first demonstration video clip shows how a portable jammer can be tuned to the frequency of a car keychain and block its signal when the switch is pressed. This means a thief can see you park, turn on the jammer before you press the lock button on your remote key, and prevent your car from locking. Unless you happen to notice that your vehicle isn't rattling or flashing, you might assume it's locked and walk away, allowing criminals to steal any valuables inside (or take the car itself).

Another video shows how a jammer can be used to interrupt a wireless doorbell camera by blocking its ability to communicate with a home WiFi network. Unless the camera has a hard-wired data connection (unlike most Ring, Blink, Wyze, and Nest doorbell cameras), it won't be able to stream video to a cloud server or alert the homeowner that someone is at the door. Tiny Transmitters explains: "As you can guess, running an all-wireless home security system has a fundamental and terrible flaw: the wireless signal can be interfered with."

Wireless signal jammers have many other possible applications, from secretly intercepting cell phone calls to disabling GPS tracking devices. These uses are illegal, but as we know, motivated criminals are unlikely to be able to reconsider the law and FCC regulations.

We're not trying to tell you to stop using WiFi, throw away your phone, or throw away your ham radio - wireless devices are convenient and very useful in an emergency. However, for the safety of your family and property, it is wise to keep in mind its potential vulnerabilities and take steps to limit over-reliance on wireless devices.

Secret Service tests way to intercept rogue drones with late-night flights over Washington

WASHINGTON — The U.S. Secret Service will conduct mysterious midnight drone flights over the next few weeks in parts of Washington, often a strict no-fly zone, as part of a secret government test aimed at , find ways to jam or shoot rogue drones out of the sky.

A U.S. official with knowledge of the program said the Secret Service is testing drones for law enforcement or protection work and looking at methods such as signal jamming to stop the threat of civilian drones. The drones were flown between 1am and 4am. The official spoke on condition of anonymity because he was not authorized to discuss the plans publicly. The Secret Service said the details were classified.

Some consumer-grade drones, often with cameras, are powerful enough to carry small amounts of explosives or grenades.

The challenge for the Secret Service is to quickly detect an illegal drone flying near the White House or the President's seat, then hack it for a short period of time to control its flight, or jam its signal to throw it off course or crash it.

The Secret Service said only that it would publicly test the drones over Washington, but declined to provide specifics, such as when they would fly, how many drones would be flying, which parts of the city they would fly over, how long they would be flying and for what purpose. It decided to give the public early notice of the tests out of concern that people who saw them might panic, especially after they were spotted over Paris at night recently. Flying at night also reduces the possibility of radio interference accidentally affecting nearby businesses, drivers, pedestrians and tourists.

Trying to keep a drone away from a safe area can be tricky

Under U.S. communications law, it is illegal to sell or use mobile signal jammer unless a government agency is doing so for a narrow purpose.

Depending on the drone's manufacturer and capabilities, its flight control and video broadcast systems typically use the same common radio frequencies as popular Wi-Fi and Bluetooth technologies. Secret Service drone radio frequency jamming—depending on how powerful or precise its work is—could disrupt nearby Internet networks or phone conversations until it was shut down. Testing in real-world environments around the White House will reveal unintended effects of disruptive effects on nearby buildings, monuments or tall trees.

Signals from an incoming drone, such as those from a video stream back to the pilot, could allow the Secret Service to detect and track it

Federal agencies typically need approval from the U.S. telecommunications advisory body, the Commerce Department's National Telecommunications and Information Administration, to jam signals. The agency declined to tell The Associated Press whether the Secret Service seeks permission, as the agency said such requests are not routinely made public.

The Federal Aviation Administration has confirmed that it has formally authorized the Secret Service to fly drones and granted it a special waiver to fly over Washington. The agency declined to provide details about the secretive program.

In January, a wayward quadcopter drone piloted by an off-duty US intelligence officer landed on the White House lawn. At the time, the Secret Service said the false landing appeared to be accidental and was not considered a security threat.

The agency had been studying safety issues surrounding drones before the January crash, but that crash led the agency to focus more on the safety of small, hard-to-detect drones. on security issues. Previously released reports revealed that the Secret Service had used anti-tracking jammer in the presidential and vice-presidential motorcade to disrupt signals that could detonate hidden remote-triggered improvised explosive devices.

Researchers at the U.S. Department of Homeland Security's Science and Technology Directorate are working on strategies to intercept unauthorized drones flying in secure areas. The Department of Homeland Security's research arm is trying to balance the security concerns of small, hard-to-detect devices with emerging commercial uses and hobbyist interests. Likewise, the National Telecommunications and Information Administration said last week that it was studying how the United States could address privacy risks through increased use of drones.

Since January 1, 2018, importing and owning a jammer has been strictly prohibited in Switzerland and the countries of the European Union. The regulations for these devices, which are also known as "signal blockers" or "jammers", have been tightened up because the ban previously only applied to placing them on the market and using them. Jammers can be dangerous because they block all cell phone traffic, making emergency calls impossible. Most of the time, advertisements for these types of devices are deceptive: they give the impression that their use is legal, and fail to make it clear that even possession is illegal.

Previously expensive, bulky and limited to neutralizing mobile phone traffic in the GSM 900 MHz frequency band, portable jammer have followed technological developments. They have become smaller and cheaper and can now interfere with a large part of the spectrum. With some models, not only mobile phone bands (GSM, UMTS, LTE, ...), but also positioning systems (GPS, Glonass, Galileo, ...), data transmission networks (WLAN, RLAN, WiMax, ...) or wireless alarm systems to be disturbed. Utilization has also evolved. While in the past the devices were only used to stop cell phone conversations on trains, restaurants or cinemas, today they are also used for criminal activities: theft of cars or trucks transporting valuable goods (by disabling the vehicle's tracking), theft in houses and homes (by neutralizing the wireless alarm system), etc.

Due to the spread of jammers, the law had to be tightened: When an amendment to the Telecommunications Act (TCA) came into force on January 1, 2018, the import and possession of drone jammer was prohibited. The manufacture, offering, making available on the market, commissioning, creation and operation of these devices also remain punishable.

With the ban of this type of installation on its national territory, Switzerland follows the EU member states and other countries such as e.g. B. the United States.

A security hazard

The use of jammers is strictly prohibited, as they not only cause inconvenience to radio spectrum users and encourage criminal activity, but can also have serious security consequences. In this way, emergency calls in the event of an accident or the alerting of emergency services such as the fire brigade, police or ambulance can be blocked. This can also cause serious problems in civil aviation, which is increasingly using the Global Navigation Satellite System (GNSS) to improve navigation performance and air traffic control monitoring activities.

In the FMG, the use of gsm jammer is tantamount to intentional interference with the radio frequency spectrum, which can be punished with a fine of up to CHF 100,000. OFCOM systematically intervenes in such cases

Jammers for authorities

It is different in prisons. Detainees use their cell phones to organize criminal activities or plan an escape. Another example is defusing explosive objects that can be detonated by radio. The FMG expressly provides penal institutions and police authorities with the option of using jamming systems to prevent mobile phone calls in their vicinity. The operation of such a system must be approved in advance by OFCOM.

Hove bar blocks cell phone signals and is more social

A Sussex landlord built a "Faraday cage" around his pub to block mobile phone signals to encourage face-to-face conversation.

Steve Taylor has fitted silver foil to the walls and copper wire mesh to the ceiling at Hove's gin barrels.

He said he was tired of people coming in and not socializing with each other or other people in the building.

"I saw things gradually getting worse and I thought, 'I want to stop this,'" Mr Taylor told BBC Sussex.

"I want people to socialize with the people they're with, not with the people they're not with.

"I made the bold decision not to block the signal with mobile signal jammer, but to do what I could with a Faraday cage to get people talking to each other, and it worked really well, to be honest.

"I had a lot of copper mesh and I thought,I can put this on the ceiling."

"I'm looking into whether it blocks the signal, when you put the phone in it, it blocks the signal."

Mr Taylor plans to set up a mobile phone area outside, similar to the smoking area.

"Pubs have landlines when calling 999 in an emergency," he said.

"It's the same as the London Underground - no more dangerous than my pub.

"The response I got was overwhelming. People loved the fact that they could just take a photo and go out and sign in or check in," he said.

"I had a complaint from a customer and she got the signal. We moved her to another table."

Arrested for speeding trap 'jammer'

Device stops camera from taking speed readings

A motorist in south Wales has become the first person in the UK to be arrested for using an electronic jammer to confuse a speed trap.

South Wales Police found the driver with a laser diffuser device in his car under a campaign called "Security Camera Collaboration".

Also known as a wifi blocker, the gadget works by alerting drivers to a laser speed detector and temporarily preventing it from taking speed readings.

The car was recorded speeding on six separate occasions around Cardiff and the South Wales valleys.

However, its travel speed cannot be read due to the signal jammer device jamming the detector.

South Wales Police Sergeant Gary Smart said: "The driver involved has been arrested for obstruction of justice and has admitted the offence."

"Partners will not tolerate the use of such diffuser devices.

He added: "Clearly, people using such devices tend to drive without due regard for speed limits and prevent police officers from carrying out their duties."

There are 33 static speed camera stations and 41 traffic signal stations in the South Wales Police area.

Another 103 mobile stations and 11 mobile units are also used to catch speeders.

Complex devices that prevent the camera from reading data quickly can be purchased from specialized websites.

They work by sending a strong laser signal to a speed detector, which causes a temporary error in the device and prevents a speed reading from being made.

"While legislation has been passed to make the use of radar diffusers illegal, there is currently no legislation on laser devices," said John Rowling of Security Camera Partners.

"Although the government is considering this important issue.

"Using this type of device is extremely dangerous as it puts the safety of other road users at risk by giving drivers a license to drive at inappropriate speeds.

He added: "I hope this arrest will serve as a clear warning to those using such devices to allow them to drive beyond the speed limit."

Dewsbury driver who used speed camera jammer jailed

A driver who used a laser gps blocker to illegally block the signals of road safety cameras has been jailed.

Police say Michael Twizell, 58, used a device on the front of his BMW 3 Series to interfere with camera equipment.

Twizel, from Dewsbury Low Road, was driving the A658 near Harrogate last February when he passed a camera van.

He was jailed for three months at York Crown Court after pleading guilty to obstructing the course of justice.

Cameramen detected the wrong code and North Yorkshire Police launched an investigation.

According to police, Twizel installed jammers on the front of his vehicle to interfere with police camera equipment.

The latest news and stories from Yorkshire

After the hearing, Traffic Constable Andy Foss said: "The use of a device capable of interfering with police speed measurements is clearly a very serious matter, as has been demonstrated today."

He added: "I would advise anyone who might have a similar device installed in a vehicle to consider the consequences and strongly advise them to remove it to avoid future prosecution."

Twizel was also fined £1,500.

North Yorkshire driver jailed for using speed camera jammer

A driver has been jailed for two months for using a laser jammer to avoid being caught by speed cameras.

In February 2018, Nicholas Burke, 46, used the device to jam the signal from a police security camera van on the outskirts of York.

Police estimate his car was traveling over the road speed limit of 60 mph.

The former car salesman pleaded guilty to perverting justice at York Crown Court.

A portable jammer installed under the front grille of Burke's car prevented the quick readout.

Its use activates a code on the camera, indicating to police that an illegal jammer is being used.

More Yorkshire news

• north yorkshire police said burke admitted in an interview that he owned the laser jammer, saying he installed it because he feared points would be deducted from his licence.


• burke, from selby green, north yorkshire, has since quit his job as a ferrari salesman.


• traffic constable andy forth said the jail sentence showed "the courts take a very pessimistic view of people using jammer device".


• "the purpose of our enforcement convoy is to reduce road casualties," he said.


• "as a result, the use of such devices to interfere with speeding enforcement (one of the top four causes of fatal and seriously injured crashes) increases the risk to everyone else using the county's roads and the communities they represent."

Linking connection problems to signal interference can be difficult. However, if you notice these signs, you may be the target of this attack:

Your signal is good, but you can't make a call or send a message. The receiving bar may be lower than usual, but it's not bad enough to stop all communication.

The router didn't show any problems, but it couldn't get online. Your Internet connection may appear normal even if there is signal interference.

Don't trust apps that claim to detect interference. Apps that claim to be able to spot interference are often fake and will show false results.

If you suspect interference, stay away. Most cell phone jammer operate within a limited radius. Therefore, try to leave the area that appears to be affected. If wireless communication is normal, you may fall victim to signal interference.

Call your service provider. Other root causes can cause wireless communication to fail. Therefore, consult your provider for possible causes.

What is signal interference? Is it legal?

Signal interference overwhelms the target signal frequency and prevents nearby users from sending or receiving data. All devices that transmit or receive wireless signals over a particular frequency are susceptible to interference. Thus, jamming can target Wi-Fi, Bluetooth, GPS, and radio communications.

Because of its dangerous effects, jamming is illegal in most countries. If caught using jamming device to disrupt wireless communications, offenders face hefty fines and jail time.

In theory, signal interference can help designate phone-free zones, especially in schools. However, in most cases, the use of jamming devices is illegal.

In France, a man used a multi-band wifi blocker to stop his children from accessing the Internet at night. However, attempts to limit Internet use at home extended to neighbors, causing disruption.

For the disturbance, the man faces a fine of 30,000 euros and up to six months in prison. Therefore, even seemingly harmless use of interference can land you in hot water with law enforcement agencies.

How does signal jamming work?

Signal jamming is the deliberate disruption of communications by transmitting strong signals and overwhelming frequencies. Depending on its operation, jamming is a DDoS or DoS attack that stops a wireless exchange.

Also, intentional interference is important, because unconscious interference is interference. The latter occurs when the Wi-Fi signal is weakened by nearby devices using the same frequency.

A jamming device can be a relatively small device that broadcasts a continuous signal to block other transmissions. Some high-end products can cost thousands of dollars, but there are also some inexpensive devices. The following are the main types of jamming systems:

Handheld or portable systems may affect smaller areas.

Fixed signal gps blocker can operate within a larger radius and interfere with a certain frequency range.

Homemade devices that cover a smaller area may target one or two frequencies.

Signal jamming as a means of censorship

1. Government-ordered disruptions may cause users in specific areas to lose access to the Internet. In other cases, radio broadcasts from other countries may also be unavailable due to interference systems.


2. China has taken signal jamming measures to block radio signals sent by foreign broadcasters.


3. Iran launched satellite jamming to block BBC signals during the presidential election.


4. Russia has used multifunctional devices to disrupt communications in Ukraine.

Protect yourself from signal interference

• In addition to detecting when someone is trying to interfere with your signal, there are a number of prevention methods you can consider.


• First, you can change the Wi-Fi frequency and channel. Most signal jamming devices block the 2.4 GHz frequency. So, by choosing 5 GHz, you can restore your Internet connection.


• For home security systems, you can use tools that use proprietary algorithms that can identify interference. Such programs then alert the owner that someone is trying to interfere with the security system.


• Finally, if you are unable to send a message or call, you can try using a VoIP service. This should help avoid attempts to interfere with radio frequencies.