Centralized Multi-user Key Management
One of the most important challenges for securing group-oriented communications is the issue of key management. As we outlined in the introductory chapter, managing keys in a group-oriented scenario is harder than traditional key management services.
In this chapter, we explore the challenges associated with centralized key management for group-oriented applications. We will begin with an overview of the fundamental limits governing centralized multicast key distribution, and then provide a survey of several approaches that exist in the literature.We then develop a new framework for multicast key management that reduces the communication overhead associated with key management, and show how to best tune this key management scheme to reduce communication overhead.
KeywordsCommunication Overhead Group Center Multicast Group Broadcast Message Member Departure
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