DETECTION OF FRAUDULENTLY REGISTERED MOBILE PHONES

摘要

A system and method are provided for detecting fraudulent use of a unique identifier associated with an authorized mobile station in a wireless telecommunications network. A monitoring system passively collects data associated with the registration of one or more mobile stations utilizing the unique identifer. A fraud detection processor analyzes the collected data using a first pattern recognition device. The pattern recognition device determines the periodicity of successive registration messages associated with the unique identifier of the authorized mobile station and a suspected fraudulent event is identified when the time between successive registration messages is non-periodic. A second pattern recognition device may be utilized alone or in combination with the first pattern recognition device to identify suspected fraudulent activity when an apparent velocity of the mobile station utilizing the unique identifier between successive registration messages exceeds a predetermined maximum velocity. The apparent velocity is based upon the approximated geographical distance and time between successive registration messages. Upon the detection of a suspected fraudulent event by the first and/or second pattern recognition devices, an authentication system may be utilized to identify a suspected mobile station as an unauthorized mobile station when a response to an authentication challenge received from the suspected mobile station is not substantially the same as a predicted response calculated by the authentication system based upon at least the unique identifier of the authorized mobile station.