Hello everyone, today's topic in GSM is Operation Security.
One of the technologies used to catch the big hackers of the time is a system called IMSI.
GSM networks provide communication by means of regional base stations signals.
The system we call IMSI is like a fake base station used by the government, IMSI device will catch GSM signals and enable them to find your location almost precisely with 50m² circle deviation.
Alternatives such as open line are vulnerable to IMSI, the best technique you can apply to avoid IMSI is VOIP(is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.) calls.
You can provide an Operation Security against IMSI thanks to ip calls instead of gsm signals.
![[Image: voip_HowItWorks_0203v2.jpg]](http://fcc.gov/voip/images/voip_HowItWorks_0203v2.jpg)
One of the technologies used to catch the big hackers of the time is a system called IMSI.
GSM networks provide communication by means of regional base stations signals.
The system we call IMSI is like a fake base station used by the government, IMSI device will catch GSM signals and enable them to find your location almost precisely with 50m² circle deviation.
Alternatives such as open line are vulnerable to IMSI, the best technique you can apply to avoid IMSI is VOIP(is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.) calls.
You can provide an Operation Security against IMSI thanks to ip calls instead of gsm signals.
