The authors also discuss current schemes for fault

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The authors also discuss current schemes for fault prevention and management. Finally, the authors introduce their own management scheme that focuses on fault detection and recovery for cluster-based sensor networks. Reliability in the data measurements resulting from phenomena observed in the environment is essential to the accurate functioning of ad hoc and sensor networks. Because the cost of communication is usually more expensive than computation, it is advantageous for a subset of the nodes to aggregate and process data from neighboring nodes locally and to communicate summary data rather than raw data. However, this type of in-network processing increases susceptibility to erroneous results from faulty nodes or malicious attacks. Chapter 8 explains the types of data anomalies that are unique to this context and surveys the state of the art in distributed anomaly detection schemes. Chapter 9 proposes two techniques for assuring the reliability of data specifically for vehicular ad hoc networks (VANETs). In VANETs, vehicles share traffic information to alert each other of events such as emergencies or traffic congestion. The authors take advantage of the high mobility of vehicles to exploit the low likelihood that vehicles traveling in opposite directions will collude in modifying or forging traffic data. Moreover, a two-directional collusion attack could only occur for the short period of time that the colluding nodes are close to each other. In such a case, subsequent messages would invalidate the malicious data. The authors propose two-directional and time-based schemes to verify the correctness of traffic data in VANETs. Network Management Most security research activity for wireless ad hoc and sensor networks has focused on enhancing specific techniques like authentication, encryption, access control and intrusion detection. Little has been done in developing frameworks for managing security services or upgrading the network post deployment. Part IV, Network Management , seeks to 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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Preface ix integrate powerful lightweight solutions to address these shortcomings, while still adhering to the resource constraints of ad hoc and sensor networks. Security operations such as encryption/decryption, frame error detection, challenge/response messages, and key exchange messages can be expensive. The ability to dynamically prescribe security operations on the basis of need can extend the life of ad hoc and sensor networks.
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  • Spring '12
  • Kushal Kanwar
  • Public key infrastructure, ........., Public-key cryptography, Pretty Good Privacy

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