Patent ID: 6707915
Filing Date: 2004-03-16
Classification: H04L,H04W

Abstract:
A method of transferring a data packet from a providing communication terminal to a requesting communication terminal, wherein:the requesting communication terminal transfers a message to the providing communication terminal including a request for receiving the data packet and a first unique identification code identifying the requesting communication terminal; the providing communication terminal verifies the validity of the first unique identification code, and upon a successful verification, responds by transferring a message to the requesting communication terminal including the requested data packet and a second unique identification code; and the requesting communication terminal verifies the validity of the second unique identification code, and upon a successful verification, stores the data packet accordingly; and wherein the providing communication terminal is a fixed unit which is a part of a wireless communication network, and the requesting communication terminal is a mobile unit communicating via the wireless communication network; the first unique identification code includes an International Mobile Equipment Identity (IMEI) code that is unique for the mobile unit; the mobile unit further to the unique identification code is associated with a unique password which is stored in the mobile unit and which may be calculated by the providing communication terminal based on the International Mobile Equipment Identity ((MEI) code and a master password that is available for the providing communication terminal, and the providing communication terminal calculates a first unique signature based on the master password and the received International Mobile Equipment identity (IMEI) code, and the first unique signature is used as the second unique identification code; and the providing communication terminal calculates a phone password for the mobile unit based on the International Mobile Equipment Identity (IMEI) code and the master password uses a secure hash algorithm, and then calculates the first unique signature based on the phone password and the data packet to be sent using the same secure hash algorithm.