Study on reputation system in information society

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In order to realize trustful information society by the reputation system, the activities of individual in the network community and the trust research under a virus infection environment have been investigated. We have collected the data on psychology and action of a person under a virus infection environment, by a questionnaire and an indoor experiment. The correlation between the cognitive effect of them and individual characteristic of those who read data show that the "specialist" who had the virus-infected experience has the cognitive effect about threat data correctly, and that he has the tendency to carry out the download of anvi-virus software.We applied Affiliation Network, which considers "duality of individuals and groups", on the analysis of the organization activity. And we proposed the evaluation method based on an affiliation network. Using the real e-mail data of the organization, it is shown that our proposal method is effective for analyzing the social network.