An approach to analyze security of GSM network

One of the weaknesses of a GSM network is a lack of two-way authentication. For years, this weakness has been abused using IMSI catcher. However, due to high prices there were no major opportunities for detailed IMSI catcher analysis and for a practical implementation of the IMSI catcher with lower costs and greater availability. Development of a software defined radio has enabled a cheaper implementation. In this paper, the implementation of open-source IMSI catcher using USRP device is presented. Also, it describes security attack based on sending malicious SMS to multiple mobile users.