EXPLOITING VALUE LOCALITY FOR SECURE-ENERGY AWARE COMMUNICATION

1. 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

2. 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

3. 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