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Signal jammers are getting smarter

perfectjammer png2019/6/15

With a wireless setup, you'll stick battery-powered sensors up around your home that keep an eye on windows, doors, motion, and more. If they detect something amiss while the system is armed, they'll transmit a wireless alert signal to a base station that will then raise the alarm.

Future Signal Jammer

That approach eliminates most of the cord-cutting concerns -- but what about their wireless analog, jamming?

With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?

  • Jamming a wireless radio requires knowledge of its broadcast frequency as well as the right equipment to jam that frequency.
  • It also requires criminal intent, because jamming is highly illegal.
  • Buying or selling these devices without the right certifications is often illegal, too.
Signal Jammers Aren’t New

The big advantage of sending out a hunter drone with countermeasures rather than trying to do it on the ground is that, being closer to the drone, the power of the signal jammer can be reduced, thus creating less disturbance to other RF devices in the area – the rogue drone is specifically targeted. Wireless security providers will often take steps to help combat the threat of jamming attacks. For instance, SimpliSafe, a two-time winner of our Editors' Choice distinction, utilizes a proprietary algorithm that's capable of separating incidental RF interference from targeted jamming attacks. When the system thinks it's being jammed, it'll notify you via push alert on your phone. From there, it's up to you to sound the alarm manually.

cell phone jammer

So now it’s the fun part, what does the second LimeSDR do?

Some of the more obvious problems with the overall concept is that the drone will jam itself and the rogue drone might already have anti-jamming capabilities installed, in which case it will just return to home. Maybe the second SDR is there to track the drone as it returns home and thereby catch the human operator? Answers/suggestions in the comments below! Video after the break.

After taking appropriate measures to contain the RF interference to our test lab, we tested the attack out for ourselves, and were able to verify that it's possible with the right equipment. However, we also verified that SimpliSafe's anti-jamming algorithm works. It caught us in the act, sent an alert to my smartphone, and also listed our RF interference on the system's event log.

cell phone jammer

There is also no way the jamming device would be allowed to jam essential safety frequencies so there are some frequencies you could fly your drone with criminal intent and be fairly sure they would not get phone blocker. Then you have the self flying – no reason a drone can’t fly a programed course and that would be pretty much impossible to affect with jamming – shut down the navigation satilite bands and maybe eventually its dead reckoning would become imprecise enough to have issues, but if you are really in the mood to do something so stupid its not hard to use direction finding based on the local FM radio station towers, map markers, sun position etc and keep accuracy in the dead reckoning.

cell phone jammer

potential vulnerability of wireless security systems to jamming attacks, emphasizing the importance of robust countermeasures to mitigate such threats.

Jamming a wireless radio requires specific knowledge of its broadcast frequency and the right equipment to interfere with that frequency. However, engaging in jamming activities is illegal, and buying or selling jamming devices without proper certifications is also prohibited. Despite these legal restrictions, the possibility of jamming attacks remains a concern for wireless security systems.

Hidden signal jammers like radar

Wireless security providers, like SimpliSafe, implement countermeasures to combat the threat of jamming attacks. For instance, SimpliSafe utilizes a proprietary algorithm capable of distinguishing between incidental RF interference and targeted jamming attacks. When the system detects potential jamming, it sends a push alert to the user's smartphone, allowing them to take appropriate action.

explores the use of hunter drones equipped with countermeasures to address the threat of jamming attacks. By deploying a drone equipped with a signal jammer closer to the rogue drone, the power of the jamming signal can be reduced, minimizing interference with other RF devices in the vicinity. However, challenges remain, such as the possibility of the rogue drone having anti-jamming capabilities or returning to its home base.

A world without tracking blocks GPS, WiFi and cell phone signals

The effectiveness of anti-jamming measures, such as SimpliSafe's algorithm, is tested and verified in controlled environments. During testing, attempts to jam the system were detected, and alerts were promptly sent to the user's smartphone. This highlights the importance of rigorous testing and continuous improvement of security systems to stay ahead of emerging threats.

While jamming attacks pose a threat to wireless security systems, there are legal and technical limitations to the extent of interference that can be achieved. Essential safety frequencies are typically protected from jamming, reducing the risk of compromising critical communication systems. Additionally, advancements in drone technology, including autonomous navigation and anti-jamming measures, contribute to enhancing security and resilience against potential threats.


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