SQTrust: Social and QoS Trust Management for Mission-Oriented Mobile Groups
Quarterly technical rept. 16 May-15 Aug 2010
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG OFFICE OF SPONSORED PROGRAMS
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We propose to combine the notions of social trust derived from social networks with quality-of-service QoS trust derived from communication networks to obtain a composite trust metric as a basis for evaluating trust of mobile nodes in mobile ad hoc network MANET environments. We demonstrate the effectiveness of the composite social and QoS trust management protocol henceforward referred to as SQTrust for mission-oriented mobile groups in MANETs for critical mission executions. SQTrust is distributed in nature and will be run by each mobile node to subjectively yet informatively assess the trust levels of other mobile nodes nearby or distance away based on direct observations towards its neighbors, and indirect observations obtained from recommenders. We take a model-based approach to analyze both objective and subjective trust as the basis for fine-tuning and validating SQTrust so that subjective trust evaluation is close to objective trust evaluation. We demonstrate resiliency of SQTrust against malicious attacks and identify the best direct vs. indirect evaluation ratio as well as the best social trust vs. QoS trust weight ratio under which the reliability of mission-oriented mobile groups in MANET environments is maximized.
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- Command, Control and Communications Systems