Patent ID: 7362866
Filing Date: 2008-04-22
Classification: H04W

Abstract:
1. A method for determining encryption algorithm used in secured communication based on Mobile Country Code (MCC), comprising: setting a MCC number list in a Core Network (CN), and storing all MCC numbers of those countries or service providers adopting the same self-developed encryption algorithms as those adopted by the homeland in this MCC number list; when a User Equipment (UE) is calling or being called, the UE sending an International Mobile Subscriber Identifier (IMSI) information of the current subscriber to the CN, the CN parsing the IMSI information and extracting the MCC number after receiving the IMSI information; if the MCC number list in the CN is null, the CN directly selecting an available standard encryption algorithm for the secured communication; otherwise the CN comparing the extracted MCC number of the current subscriber with elements of the MCC number list one by one, and the CN instructing the UE and an access network to start secured communication with the selected encryption algorithm.