Multiple Layer Encryption for Multicast Groups (abstract)

We propose a scalable multicast access control framework targeted for large dynamic groups, where members are added and removed frequently. Access control is provided by the original use of the counter-based block cipher mode of operation to encrypt traffic. This scheme uses intermediary elements in the network that contribute individually to the encryption, providing confidentiality, backward and forward secrecy and also containment, a property that limits the impact of the compromise of member access keys.

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