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In the Internet of Things (IoT), we all are ``things''. Graph theory, a branch of discrete mathematics, has been proven to be useful and powerful in understanding complex networks in history. By means of graph theory, we define new concepts and terminology, and explore the definition of IoT, and then show that IoT is the union of a topological network, a data-functional network and a domi-functional...
Multicasting is increasingly used as an efficient communication mechanism for group-oriented applications in the internet. As a result, more and more attention is paid on secure multicast communication. While peer-to-peer security is a mature and well developed field, secure group communication remains relatively unexplored. As one of the most key problems of secure multicast, source authentication...
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