Date Added: Sep 2009
Services such as audio/video streaming, advertising, and software distribution can be delivered much more efficiently by Network Service Providers if multicast data distribution is used. However, accounting for the resources consumed by subscribers becomes essential. Using an e-commerce (payment recovery) operational environment, in turn, requires support for security properties such as authentication, authorization, data confidentiality, and non-repudiation. However, multicast data distribution is inherently more susceptible to attack than unicast distribution, given its greater susceptibility to interception of the network traffic. Securing multicast sessions in B2C commerce requires authentication of the end-host, authorization of the subscriber and his e-payments, and accounting for a subscriber's consumed resources.