Patent ID: 8296425

Claim:
A method for a lawful interception of an Internet service at a system comprising an interception unit, an application service providing unit, and an Internet access service providing unit, the method comprising: receiving, by the application service providing unit, an interception request comprising interception target information of an interception target from the interception unit; transferring, by the application service providing unit, a user code corresponding to the received interception target information to the interception unit; inserting, by the interception unit, user related information into a packet to be provided to the interception target corresponding to the user code, enabling the packet to be lawfully intercepted; requesting, by the interception unit, the Internet access service providing unit for an interception of the packet with respect to the interception target by including the user code; inspecting, by the Internet access service providing unit, a user code in a user related information field of a packet provided from the application service providing unit; extracting, by the Internet access service providing unit, interception information from the packet when the same code as the user code received from the interception unit is included; and transferring, by the Internet access service providing unit, the extracted interception information to the interception unit; wherein the interception information includes communication data and communication connection information containing an Internet application service, a user identifier (ID), an Internet protocol (IP) address allocated to the interception target.