With the rapid development of mobile communication technology, mobile communication networks have become an important channel for all kinds of criminals and hostile organization to coudct communication acitivties. Collecting mobile user of information IMSI (International Mobile Subscriber Identity) and IMEI(Terminal Device Number) of mobile phone user has become an important means of technology reconnaissance, With the rapid growth of the number of mobile phone users,the information content related to it is use for urban management, Public security prevention and control, criminal investigation and other fields are playing an increasingly important role.

The “acquisition system” uses a special communication protocol and allows the mobile phone to reselect the network from the signaling, after the mobile phone enters the collection point network,the mobile phone is promoted to update the location area, get the user’s IMSI/IMEI from the signaling, the collected IMSI/IMEI information is encrypted and transmitted to the background analsis server The collected IMSI/IMEI information is encrypted and transmitted to the background analysis server through wireless or wired means, providing the investigator with information means for querying, analyzing and processing the case.

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