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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Research Article In Situ Key Establishment in Large-Scale Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 427492 12 pages doi 10.1155 2009 427492 Research Article In Situ Key Establishment in Large-Scale Sensor Networks Yingchang Xiang 1 Fang Liu 2 Xiuzhen Cheng 3 Dechang Chen 4 and David H. C. Du5 department of Basic Courses Rizhao Polytechnic College Rizhao Shandong 276826 China department of Computer Science University of Texas - Pan American Edinburg Texas 78539 USA 3 Department of Computer Science The George Washington University Washington DC 20052 USA 4 Department of Preventive Medicine and Biometrics Uniformed Services University of the Health Sciences Bethesda mD 20817 USA 5 Department of Computer Science and Engineering University of Minnesota Minneapolis Minnesota USA Correspondence should be addressed to Xiuzhen Cheng cheng@gwu.edu Received 1 January 2009 Accepted 11 April 2009 Recommended by Yang Xiao Due to its efficiency symmetric key cryptography is very attractive in sensor networks. A number of key predistribution schemes have been proposed but the scalability is often constrained by the unavailability of topology information before deployment and the limited storage budget within sensors. To overcome this problem three in-situ key establishment schemes SBK LKE and iPAK have been proposed. These schemes require no preloaded keying information but let sensors compute pairwise keys after deployment. In this paper we propose an in-situ key establishment framework of which iPAK SBK and LKE represent different instantiations. We further compare the performance of these schemes in terms of scalability connectivity storage and resilience. Our simulation results indicate that all the three schemes scale well to large sensor networks. We also notice that SBK outperforms LKE and LKE outperforms iPAK with respect to topology adaptability. Finally observing that iPAK SBK and LKE all rely on the key space models that involve computationally intensive .
