Fraud detection method for mobile telecommunication networks

The invention claims a deceit method for third-generation mobile communication system, the system is made of the access type and authentication machine and server for address of the successful certification program and a data and second deceit a. The data of comprises a service environment from the certification program for transferring authentication failure of local to environment information reporting with definition type area; and both the ancestral home location registerand and transmitted to the deceit testing system and basic deceit a processing, which is deceiving target detection.