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Companies or institutions that have been hacked usually do not know they were hacked, or refrain from announcing it to the public, so there are not many known cases.

Although wired hacking leaves traces, wireless hacking attempts that connect to the internal system do not leave traces unless the hacker.

[Hacking instances]

NSA from the US has installed hacking programs in 100,000 PCs across the globe that work with wireless frequencies.

A leakage of defense infrastructure information through the hacking of Mitsubishi Corp, Japan.

Frequency jamming is currently illegal.

Moreover, unexpected problems may occur since frequency jamming will block all radio  waves passing through the whole area.

There have been some cases in recent years where frequency jamming has been used for national facilities (jamming drone frequencies near nuclear power plants), but they can not be used in the private sector.

For eavesdropping devices, the location can be found through the volume of the audio.

It is likely the eavesdropping device is located in the loudest area.

And for secret cameras, the location can be detected through the angle of the video.

 GITSN’s 24/7 Intelligent Eavesdropping Detection System scans the wireless frequency range between 25 kHz-6GHz and creates a frequency model of the area.

If detection is carried out, and it identifies an abnormal frequency, it extracts the location through its detection algorithm and sends an alarm.

Eavesdropping methods are improving by the day. They are now able to remotely turn on/off the transmission.

If they turn the eavesdropping equipment off during detection using portable detectors, it will go undetected.

If you install a 24/7 detection system, it can be detected 24/7 without a break.