Survey on Recognition of Privacy Risk from Responding on Twitter

Social networking services (SNS) are often the subject of privacy concerns. Hence users should be careful not to post content with unacceptable privacy risks. In order to correctly determine whether a privacy risk is acceptable, the perceived privacy risk must match the actual privacy risk. One of the objectives of this study is to investigate whether the recognition of privacy risk is consistent with the actual privacy risk. This study investigates the posters ’recognition of privacy risk from postings that infer their attributes and regrets about their actions. On the other hand, privacy information can also be leaked from other people’s posts, to which people respond with "Liking" or "Retweeting." Existing methods for analyzing their posts to suppress their posts may not be effective if personal information is leaked from the responses to the contents of others’ posts. In addition, users may be less likely to perceive the risk of privacy information leakage from responses to the contents of others ’ posts than from their posts. Therefore, this study tests the hypothesis that there is a difference between the users’ recognition of privacy risk in posting by themselves and that caused by responding to contents of others’ posts and evaluates the difficulty of recognizing privacy risk caused by responding compared with that by posting.