Patent ID: 6925568
Filing Date: 2005-08-02
Classification: H04L,H04W

Abstract:
1. In a method of encryption and decryption of messages in a telecommunication system that includes a telecommunication network, a message switching center connected to the telecommunication network for directing messages through the telecommunication system, a service provider, transmission software connecting the message switching center to the service provider, a subscriber's mobile station connected to the telecommunication network and from which messages are generated and are sent and received via the message switching center, and a subscriber identity module connected to the mobile station for storing on the subscriber identity module a message to be one of encrypted and decrypted and applications and parameters for encryption and decryption of the stored message, the improvement comprising the steps of: monitoring a predetermined memory location of the subscriber identity module for presence at said memory location of a predetermined string, and initiating, in response to monitored detection of the predetermined string at said memory location, one of encryption and decryption of the message stored on the subscriber identity module.