Trust Computation using Belief Model in Mobile Ad Hoc Network Avoiding Ballot Stuffing and Bad Mouthing
Hiteishi Diwanji

Hiteishi Diwanji, Information Technology department, L.D.College of Engineering, Ahmedabad, India.

Manuscript received on January 13, 2020. | Revised Manuscript received on January 22, 2020. | Manuscript published on February 10, 2020. | PP: 1057-1066 | Volume-9 Issue-4, February 2020. | Retrieval Number: D1507029420/2020©BEIESP | DOI: 10.35940/ijitee.D1507.029420
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Abstract: Trusted path in MANET ensures packet delivery and reduces the packet dropping which results in a saving of bandwidth and energy of the mobile node. Trust path finding mechanism has been proposed in the literature based on direct and indirect observations and applying Bayesian theory, Dempster-Shafer theory involving probability logic. In this paper, we studied trust computation problem in MANET with predefined fixed movement and random movement (frMANET) to compute trust to get over bad mouthing and ballot stuffing. Our scheme(frMANET scheme) is based on subjective logic based belief model involving uncertainty in behavior. We use consensus for parallel paths and discounting for transitive paths. We use public key based digital signature to deal with nonrepudiation. This identifies the node if denying that it is bad mouthing or ballot stuffing. Unlike trust management in a conventional scheme that computes trust based on packet dropping and forwarding, we have added a parameter – state of the node indicating priority work and unable to participate notification. We include service rating as well considering file sharing and file downloading as service rating parameter. We have evaluated University case study of a course offered by a professor in university to the enrolled and not enrolled students. The simulation results show an increase in packet delivery ratio with marginal overhead in average message transmission. The scheme helps in avoiding unnecessary fluctuations in trust values of trustworthy nodes and also ensures less computational overhead. This research is helpful when communication is frequent and failure of delivery of message is not tolerable in MANET and nodes need to be rated for goodness. 
Keywords:  MANET, logic, Belief Model, Security, Trust and Reputation Management.
Scope of the Article:  Digital System and Logic Design