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Internet users have to provide their identity information to use various services from Internet service providers by pre-agreement for use contracts. However, efficient countermeasures are impossible against misuse of users' information, because most of use contracts require wide use of users' information. In order to address this problem, a technique is required, which informs users why their information has to be used and get consent from users when Internet service providers request the information. In this paper, we propose the real-time user consent acquisition system.