| 摘要 |
A mobile communication system ( 10 ) includes a network access device ( 180 ), a mobile communication device ( 100 ), and a key management server ( 140 ). The network access device periodically broadcasts a beacon frame including an address of the network access device. The mobile communication device receives the beacon frame, retrieves the address of the network access device, and sends the address via a short message. The key management server receives the address, retrieves an identifiable name of the network access device according to the address, sends a key request to the network access device corresponding to the identifiable name to retrieve a key, and sends the key to the mobile communication device via another short message.
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