Patent ID: 8358784
Filing Date: 2013-01-22
Classification: H04L,H04W

Abstract:
1. A method of authenticating a wireless communication device, comprising the steps of: transmitting a first message to a server from a communication device; transmitting a random number and a modulo value to the communication device from the server; generating a first random sequence using the random number and the modulo value by the communication device using a Deterministic Random Sequence Generation (DRSG) process; generating an encrypted message by encrypting the first random sequence using a pre-shared private key and a session key at the communication device; transmitting the encrypted message to the server from the communication device; retrieving the first random sequence by decrypting the encrypted message at the server; generating a second random sequence at the server by applying the DRSG process to an order value, a seed value and communication device identifying information obtained from decrypting the first random sequence; comparing the second random sequence and the first random sequence at the server; and authorizing a synchronization process with the communication device by the server if the second random sequence equals the first random sequence, and if an order of the second random sequence equals the order of the first random sequence.