Trust, a multi-faceted and context dependent subjective factor, is gaining prominence in the computer world for the virtue of shielding applications from deceptions. Numerous applications online and offline rely on trust-reputation system as a means for the propagation of trust. Trust which is determined as encompassment of personal experiences and reputation is propagated across the participants in an application through transitivity. Difference in the nature of applications and context dependency of trust make it impossible to have a universal trust propagation scheme. The dimension of challenges in establishing transitivity of trust remains unexplored. This paper discusses the changing face of trust determination based on the computational models. It structures the transitive propagation of bi-directional trust, explores the challenges of transitivity in unidirectional trust and proposes a solution for the same. Prominent applications are discussed and classified along the lines of trust propagation. © Research India Publications.
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P. L. Aiswarya, Dr. Shyamala C. K., and Sukanya, V. S., “Computation of trust”, International Journal of Applied Engineering Research, vol. 10, pp. 26093-26102, 2015.