I'm interested in securing IP Multicast traffic for content that will be sent globally with several low bandwidth receivers.
I understand that simplified Broadcast encryption takes N public keys and encrypts a symmetric key N times. This is an O(N) operation, that needs to be refreshed any time the membership of N changes.
I'm hoping that a technology is proven in either IPv6 or IP Multicast that will solve the need to secure IP Multicast problem.