METHOD AND APPARATUS FOR SECURE DATA TRANSMISSION IN MOBILE COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for secure data transmission in a mobile communication system.

SOLUTION: There are provided a method and apparatus for secure transmissions. Each user is provided a registration key. A long-time updated broadcast key is encrypted using the registration key and provided periodically to a user. A short-time updated key is encrypted using the broadcast key and provided periodically to a user. Broadcasts are then encrypted using the short-time key, in which the user decrypts the broadcast message using the short-time key. One embodiment provides link layer content encryption. Another embodiment provides end-to-end encryption.

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