A survey on Trust Models in MANET

  JUHI KANERIA,  HITEISHI DIWANJI

Mobile Ad hoc network (MANET) consists of a set of mobile nodes in an inherently insecure environment, having limited battery capacities. Since MANET do not have a fix infrastructure, wireless links are vulnerable and topology changes randomly, securing MANET is difficult than the traditional networks. In ad-hoc network mobile nodes comes and leaves the network so providing trust in such a network is crucial task. In this paper we survey different properties of trust like context dependency, asymmetricity, transitivity, etc. and cluster based and maturity based trust schemes are presented. A cluster based trust evaluation schemes for MANET is presented to overcome the limited information about unacquainted nodes and to lessen the memory space. The proposed cluster-based trust model can quickly obtain the trust value even in the situation where there has been no experience data available. In this scheme the concept of inter cluster recommendation trust was introduced. The trust value was calculated using the reputation from a neighbouring node. In this model, a network was divided into clusters with one special node (cluster head) responsible for establishing trust relationship for internal clusters dynamically based on previous transactions result. The head node issues the certificate showing the trust level of each member node. When a node moves from one cluster to another, its trust level is determined by the certificate issued by previous cluster-head. This model can monitor the selfish behaviour of nodes in the network and isolate the selfish nodes from the network to enhance the effectiveness throughout the network. In maturity based scheme, trust is based on previous individual experiences and on the recommendations of others. Recommendation Exchange Protocol (REP) is used that allows nodes to exchange recommendations about their neighbors. This model does not require distribution of the trust information over the entire network. Without the need for a global trust knowledge, maturity based trust evaluation scheme rules well for large networks while still reducing the number of exchanged messages and therefore the energy consumption.

Keywords- MANET, Trust, Trust evaluation, Cluster based trust model, Maturity based trust model

Unique Identification Number - IJEDR1401123
Page Number(s) - 678-682
Pubished in - Volume 2 | Issue 1 | March 2014
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  JUHI KANERIA,  HITEISHI DIWANJI,   "A survey on Trust Models in MANET", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.2, Issue 1, pp.678-682, March 2014, Available at :http://www.ijedr.org/papers/IJEDR1401123.pdf