With the rapid development of the Internet of Things (IoT), more and more devices are connected to the Internet via radio frequencies (RF). Although these technologies have brought great convenience to life, they have also provided new opportunities for criminal activities, especially through the use of RF jammers. cell phone jammer RF jammers have become a highly effective tool in criminal activities such as theft and burglary, posing great security risks.

　　1. Vulnerability of IoT and Radio Frequency

　　IoT devices often rely on radio frequencies (RF) for communication and control. signal jammerAlthough many of these devices use encryption protocols, their normal operation can be easily disrupted by blocking their signals. GPS jammer Using RF jammers does not require advanced technology, and criminals can hinder the normal operation of the Internet of Things with simple devices, and even use jammers to create chaos.

　　A recent case in Manchester, UK, demonstrated this vulnerability. Thieves used car lock jammers with the intention of entering the vehicle by interfering with the car lock signal. However, this operation not only caused multiple cars in the parking lot to be unable to unlock, but also triggered multiple alarm systems, causing chaos on the scene. This type of jammer mainly interferes with the frequency of the car remote lock, making it impossible for the car owner to unlock or lock the vehicle by remote control, directly providing thieves with an opportunity to commit crimes.

　　2. The widespread use of car lock jammers

　　In North America, most car locks use the 315MHz frequency, while in Europe and Asia, car locks operate at the 433MHz frequency. These frequencies are designed specifically for short-range communications, but are easily blocked by jammers. Although signal jammers are illegal in most countries, they are still easy to buy on the black market and the Internet. Prices usually range from $50 to $200, depending on the function and working range of the device. Many jammers can work within a range of 50 meters, which is enough to cause large-scale interference in parking lots or communities.

　　To avoid this interference, car owners can choose to lock the car manually instead of relying entirely on the remote lock. However, as technology develops, some new models have cancelled the option of manual locking, which puts car owners at greater risk. Even so, car owners should still be alert and confirm whether the vehicle has been successfully locked by hearing or visually.

　　3. The dangers of home automation and radio frequency interference

　　Not only cars, but home automation systems are also susceptible to interference. These systems typically operate on 868MHz frequencies through Zigbee or other proprietary protocols to control devices such as door locks, cameras, thermostats, etc. Although some systems use encryption technology, once a jammer is enabled, it can still paralyze the entire system, creating a huge vulnerability in home security.