Cipher method and system for multicast service

The invention provides a cipher method and system for multicast service. A group includes a plurality of user equipments, each having a respective key, and every two keys are orthogonal with each other. A content provider provides a message to the user equipments in the group. A BM-SC server has a k...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TSAO, SHIAO-LI, HSU, YUING, LIN, CHIAIN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides a cipher method and system for multicast service. A group includes a plurality of user equipments, each having a respective key, and every two keys are orthogonal with each other. A content provider provides a message to the user equipments in the group. A BM-SC server has a key set composed of the keys of all user equipments in the group to encipher the message for being broadcasted. The user equipments in the group receive and decipher the enciphered message with respective keys.