Increasing Stability of Value-Centric Trust Model through Improved Familiarity Measurement

The relationship between trust and familiarity has been clarified through a value-centric trust model. Formalization of familiarity contributes to formalization of trust through the trust model. However, familiarity was assumed to be the similarity of values (fixed for two agents), and stability of the trust model was relatively low. To increase the stability, we propose an improved familiarity measurement based on the exploration of factors that affect human familiarity, and the mapping from those factors to the properties of agent societies. The trust model is examined within the context of a multiagent system (MAS) based on an e-commerce framework. Experiments are also carried out to compare the stability of the trust model with the improved familiarity measurement and with the fixed familiarity value. It is observed that the stability is increased by 33.47% through the improved familiarity measurement.