Key Management Scheme for Multi-Layer Secure Group Communication

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Executive Summary

Many emerging applications are based on group communication model and many group communications like multimedia distribution and military applications require a security infrastructure that provides multiple levels of access control for group members in which group members are divided into a number of subgroups and placed at different privilege levels based on certain criteria and a member at higher level must be capable of accessing communication in its own level as well as its descendant lower levels and converse is not true. Two key management schemes have been developed to provide hierarchical access control: first method is key-based and the second one is share-based.

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