Trust evaluation in ad-hoc networks

Abstract

An important concept in network security is trust, interpreted as a relation among entities that participate in various protocols. Trust relations are based on evidence related to the previous interactions of entities within a protocol. In this work, we are focusing on the evaluation process of trust evidence in Ad Hoc Networks. Because of the dynamic nature of Ad Hoc Networks, trust evidence may be uncertain and incomplete. Also, no pre-established infrastructure can be assumed. The process is formulated as a path problem on a directed graph, where nodes represent entities, and edges represent trust relations. Using the theory of semirings, we show how two nodes can establish an indirect trust relation without previous direct interaction. The results are robust in the presence of attackers. We give intuitive requirements for any trust evaluation algorithm. The performance of the scheme is evaluated on three topologies.

Analyzing a Human-based Trust Model for Mobile Ad Hoc Networks

“…The contribution considers not only the trust level of others but also the accuracy and the relationship maturity. The accuracy of a trust level is defined by the standard deviation, similar to Theodorakopoulos and Baras [4]. The value in the trust level table of node a regarding node b is associated to a standard deviation σ a (b), which refers to the variations of the trust level that node a has observed about node b.…”

Distributed Data Fusion for Detecting Sybil Attacks in VANETs

“…Different research papers have been dedicated to find a solution to these problems. Many recent works deal with reputation mechanisms ( [20], [1], [9]) and trust evaluation ( [16], [17]) to manage the confidence in the source of information. Others were interested in data aggregation without taking into account the source [2] [3][10] [13].…”

Improving Route Selection Mechanism using Trust Factor in AODV Routing Protocol for MaNeT

“…More and more use of internet is done by managers, workers, branch offices and business tycoons to remotely connect to their networks and to perform commercial transactions via the World Wide Web [3].Due to wide use of internet by common man for personal work and tremendous use by business persons, internet is very prone to threat attacks. Although network attacks are presumably more serious when they are inflicted upon businesses that store sensitive data, such as personal medical or financial records, the important data can be lost, privacy can be violated [4].An ad-hoc network is a collection of autonomous nodes or terminals that communicate with each other by forming a multi-hop radio network and maintaining connectivity in a decentralized manner. Each node functions as both a host and a router.…”