Patent ID: 8196202
Filing Date: 2012-06-05
Classification: H04L,H04W

Abstract:
1. A security system for a mobile network having a gateway for receiving messages from outside the network and a network element storing mobile terminal location information, comprising a processor wherein the security system is adapted to: monitor by the processor in real time look-up requests made to said network element and entering the network through the gateway, monitor by the processor in real time a message entering the network through the gateway and its correspondence to said look-up requests; and decide by the processor that said message is likely to be unsolicited, and wherein the system further comprises a data store device and a timer device, wherein the system processor is adapted to store in the data store device look-up request information obtained from said look-up requests received from the gateway, wherein, when a message is received, the system processor is adapted to use said timer device to decide that said message is likely to be unsolicited if a prior look-up request corresponding to said message had not been received within a pre-set time period; and wherein the system processor is adapted to monitor in said look-up request information obtained from said look-up requests a source address of a look-up request and to monitor a source address of said message, and to decide that the message is likely to be unsolicited if the message source address is different from the corresponding look-up request source address.