Overview

This dissertation, Design and Evaluation of Key Redistribution Mechanisms in Wireless Sensor Networks by Chun-fai, Terry, Law, 羅俊輝, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled Design and Evaluation of Key Redistribution Mechanisms in Wireless Sensor Networks submitted by Terry Chun-Fai LAW for the degree of Master of Philosophy at The University of Hong Kong August 31, 2007 Key management has long been a challenging problem in Wireless Sensor Networks (WSNs), as a result of their high security requirements and strict resource constraints. Recently, a random- ized key pre-distribution scheme has been introduced to serve as a practical solution and many improvements have subsequently been proposed. These schemes mainly focus on key allocations based on pre-deployment estimates of post-deployment system features such as location data and attack probabilities. Unfortunately, such feature information may be unavailable or may change over time. Thus, many existing schemes have sought to achieve a certain level of performance by providing excessive resources. For instance, connectivity can be improved by increasing the number of keys stored in each sensor node. However, this results in inefficient resource usage and leads to poor security. Based on adaptability to post-deployment contexts, we propose a general key redistribution framework that exploits neighboring keys from connected neighbors to reach unconnected nodes. We show that our framework can be applied to most existing key pre-distribution schemes (both key-based and polynomial-based) to further improve their performance. Based on our analyti- cal and simulation results, we demonstrate our proposed framework's salient features, such as high connectivity, high resilience, and efficient memory usage. We also study the resistant ability of dif- ferent key management schemes by using various attack patterns. More importantly, we develop a key-based redistribution protocol and successfully implement it using existing sensor technologies. Based on real hardware profile, evaluation results show that our framework is efficient and capable of deployment in WSNs. (Total words: 250) DOI: 10.5353/th_b3900700 Subjects: Sensor networksWireless communication systemsComputer networks - Security measures

Full Product Details

9781361470350

Table of Contents

Reviews

Author Information

Tab Content 6

Countries Available