QUALCOMM Incorporated
SECURE COMMUNICATION OF BROADCAST INFORMATION RELATED TO CELL ACCESS

Abstract:

Aspects of the disclosure relate to mechanisms for securely communicating broadcast information related to cell access within a secure cell. The broadcast information may be encrypted using a cell-specific broadcast key that may be derived from a broadcast root key that is refreshed periodically. A wireless communication device may obtain the broadcast root key via a secure connection with a provisioning server or core network node within a core network maintaining the broadcast root key or a long term key from which the broadcast root key may be derived. The cell-specific broadcast key may be derived using a key derivation function of the broadcast root key and at least cell identifying information associated with the secure cell.