Conference Paper

Secure Reporting of Traffic Forwarding Activity in Mobile Ad Hoc Networks.

Dept. of Comput. Sci. & Eng., Pennsylvania State Univ., University Park, PA, USA;
DOI: 10.1109/MOBIQUITOUS.2005.53 Conference: 2nd Annual International Conference on Mobile and Ubiquitous Systems (MobiQuitous 2005), 17-21 July 2005, San Diego, CA, USA
Source: DBLP

ABSTRACT Nodes forward data on behalf of each other in mobile ad hoc networks. In a civilian application, nodes are assumed to be selfish and rational, i.e., they pursue their own self-interest. Hence, the ability to accurately measure traffic forwarding is critical to ensure proper network operation. These measurements are often used to credit nodes based on their level of participation, or to detect loss. Past solutions employ neighbor monitoring and reporting on node forwarding traffic. These methods are not applicable in civilian networks where neighbor nodes lack the desire or ability to perform the monitoring function. Such environments occur frequently in which neighbor hosts are resource constrained, or in networks where directional antennas are used and reliable monitoring is difficult or impossible. In this paper, we propose a protocol that uses nodes on the data path to securely produce packet forwarding reports. Reporting nodes are chosen randomly and secretly so that malicious nodes cannot modify their behavior based upon the monitoring point. The integrity and authenticity of reports are preserved through the use of secure link layer acknowledgments and monitoring reports. The robustness of the reporting mechanism is strengthened by forwarding the report to multiple destinations (source and destination). We explore the security, cost, and accuracy of our protocol.

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    ABSTRACT: Mobile ad hoc networks often support sensitive applications. These applications may require that users' identity, location, and correspondents be kept secret. This is a challenge in a MANET because of the cooperative nature of the network and broadcast nature of the communication media. In this paper, we propose a privacy preserving communication system (PPCS) which provides a comprehensive solution to anonymize communication end- points, keep the location and identifier of a node unlinkable, and mask the existence of communication flows. We present an analysis of the security of PPCS against passive internal attackers, provide a qualitative discussion on its strength against external attackers, and characterize its performance trade-offs. The simulation results demonstrate that PPCS has only 3% lower packet delivery ratio than existing multi-path routing protocols, while effectively providing privacy service in MANETs.
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