Functional sensor nodes that communicate in short

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functional sensor nodes that communicate in short distances through wire- less links. 1 Such sensor networks are ideal candidates for a wide range of applications in military and civilian operations such as health monitoring, data acquisition in hazardous environments, and target tracking. The de- sirable features of wireless sensor networks have attracted many researchers to develop protocols and algorithms to support these various applications (e.g., Refs. 1–5). Sensor networks (especially in military operations) are often deployed in hostile environments where enemies may be present. It is therefore critical to ensure the correct network operations as well as the integrity, availabil- ity, and at times confidentiality of the data collected by sensor nodes in hostile environments. However, providing security services for sensor net- works is particularly challenging. In the first place, sensor nodes are usually resource-constrained, which makes it not practical to implement those well- studied but expensive algorithms on sensor nodes. Second, sensor nodes are usually deployed in an unattended manner. It is very difficult to physically protect the sensor nodes individually. A few sensor node could be captured by adversaries after deployment. Once a sensor node is captured, it can give way its secrets very quickly. 6 As a result, any security algorithm has to be resilient against the compromised sensor nodes. Key management is the cornerstone of many security services such as authentication and encryption. A critical task of key management is to establish a pairwise key between two sensor nodes in the network. Research seeking low-cost pairwise key establishment techniques that can survive node compromises in sensor networks was quite active in the past three, four years, yielding several novel key pre-distribution schemes. To name a few, Eschenauer and Gligor proposed to distribute a random subset of keys from a key pool to every sensor node before deployment such that every pair of sensor nodes will have a certain probability of sharing at least one key after deployment. 7 Chan et al. extended this scheme by having two sensor nodes share at least q pre-distributed keys to establish a pairwise key. 8 Chan et al. also developed a random pairwise keys scheme. 8 This scheme pre-distributes random pairwise keys between a sensor node and a random subset of other sensor nodes, and has the property that the compromise of sensor nodes does not lead to the compromise of any key Copyright © 2010. World Scientific Publishing Company. All rights reserved. May not be reproduced in any form without permission from the publisher, except fair uses permitted under U.S. or applicable copyright law. EBSCO Publishing : eBook Collection (EBSCOhost) - printed on 2/16/2016 3:46 AM via CGC-GROUP OF COLLEGES (GHARUAN) AN: 340572 ; Beyah, Raheem, Corbett, Cherita, McNair, Janise.; Security in Ad Hoc and Sensor Networks Account: ns224671
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Key Pre-Distribution for Sensor Networks Using Group Deployment Knowledge 69 shared directly between two non-compromised sensor nodes. To further
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