Networks since the wireless communication is one of

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networks since the wireless communication is one of the most expensive op- erations for wireless sensor networks. 2 On the other hand, this will greatly simplify our path key establishment protocol as well as the implementation of our final group-based key pre-distribution technique. Indeed, it will not 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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78 D. Liu, P. Ning and W. Du only save the communication overhead but also reduce the code size for the implementation. Therefore, from the whole-system’s point of view, we are able to allocate more storage space for keying materials, leading to a more secure and efficient group-based key pre-distribution technique. Addition- ally, the above idea is practical since every deployment group or cross group only has a small number of sensor nodes. For the second issue, we propose a simple way to identify the working bridge between two sensor nodes. Specifically, every sensor node only needs to discover the list of the nearby sensor nodes that belong to the same deployment group as itself. Once the lists are available, two neighbor sensor nodes u and v only need to exchange their lists to identify a working bridge u , v where u and v are actually close to the two sensor nodes u and v . For example, in Figure 2, suppose node 1 and node 12 want to establish an indirect key. Node 1 discovers that node 2 is in its neighborhood, and node 12 discovers that node 11 is in its neighborhood. In this case, after node 1 and node 12 exchanged their lists of the nearby sensor nodes, they can easily conclude that the bridge 2 , 11 works perfect for them. Additionally, we note that any two sensor nodes in the same deployment or cross group can always establish a direct key according to our early discussion for the requirement of the solutions for the first issue. This makes our solution for the second issue more efficient. Note that in the above algorithm, two sensor nodes need to exchange the lists of neighbor nodes in the same group to identify the working bridge. The size of such list could be large, making it expensive for communication between sensor nodes. However, the size of such list is always no more than m . In addition, the IDs of the sensor nodes in a particular deployment group can be easily computed due to our group construction method. We can simply use a bit string to represent the list of neighbor nodes that belong to the same group. Hence, we only need m 8 bytes for such list.
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  • Spring '12
  • Kushal Kanwar
  • Public key infrastructure, ........., Public-key cryptography, Pretty Good Privacy

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