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 Article Efficient Path Key Establishment for Wireless Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 456703 9 pages doi 2008 456703 Research Article Efficient Path Key Establishment for Wireless Sensor Networks Noureddine Mehallegue Ahmed Bouridane and Emi Garcia The Institute of Electronics Communications and Information Technology Queen s University of Belfast Northern Ireland Science Park Belfast BT3 9DT UK Correspondence should be addressed to Noureddine Mehallegue nmehallegue01@ Received 13 June 2007 Revised 30 November 2007 Accepted 11 February 2008 Recommended by Athina Petropulu Key predistribution schemes have been proposed as means to overcome wireless sensor network constraints such as limited communication and processing power. Two sensor nodes can establish a secure link with some probability based on the information stored in their memories though it is not always possible that two sensor nodes may set up a secure link. In this paper we propose a new approach that elects trusted common nodes called Proxies which reside on an existing secure path linking two sensor nodes. These sensor nodes are used to send the generated key which will be divided into parts nuggets according to the number of elected proxies. Our approach has been assessed against previously developed algorithms and the results show that our algorithm discovers proxies more quickly which are closer to both end nodes thus producing shorter path lengths. We have also assessed the impact of our algorithm on the average time to establish a secure link when the transmitter and receiver of the sensor nodes are ON. The results show the superiority of our algorithm in this regard. Overall the proposed algorithm is well suited for wireless sensor networks. Copyright 2008 Noureddine Mehallegue et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium .
