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EXPLOITING VALUE LOCALITY FOR SECURE-ENERGY AWARE COMMUNICATION. H. Saputra, N. Vijaykrishnan, M. Kandemir, R. Brooks, and M.J. Irwin Computer Science and Engineering Applied Research Lab The Pennsylvania State University. Node 1. Node 2. Node 1. Node 2. 2. B,2. A. A. A. A. Ptr_2.
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EXPLOITING VALUE LOCALITY FOR SECURE-ENERGY AWARE COMMUNICATION H. Saputra, N. Vijaykrishnan, M. Kandemir, R. Brooks, and M.J. Irwin Computer Science and Engineering Applied Research Lab The Pennsylvania State University
Node 1 Node 2 Node 1 Node 2 2 B,2 A A A A Ptr_2 Ptr_1 Ptr_2 B B,2 2 Ptr_1 Node 3 B,2 Node 4 Node 3 Node 4 2 A A A A Ptr_3 Ptr_4 B B Ptr_3 Ptr_4 Node 1 Node 2 Node 1 Node 2 B,2 A A A A Ptr_1 Ptr_2 B,2 1 B B Ptr_1 Ptr_2 Node 3 Node 4 Node 3 1 Node 4 B,2 A A A A Ptr_3 Ptr_4 1 B B Ptr_3 Ptr_4 EXPLOITING VALUE LOCALITY FOR SECURE-ENERGY AWARE COMMUNICATION • The main goal is to reduce the energy • consumption of a sensor network while • still providing enough security • Exploits the possibility of temporal and • spatial sensed value locality • Uses a caching scheme which each • sensor node has a cache to store • already seen values • Uses a cache and its index value for • already seen value stored in the cache • Need mechanisms to handle lost • communications Example of lost communications
EXPLOITING VALUE LOCALITY FOR SECURE-ENERGY AWARE COMMUNICATION • Transmit only the index of the cache for • hit operation, and transmit the original • value for miss operations • The size of index-value packet is • smaller than the ordinary-value packet • Do not need any encryption • process for index-value packet