Internet of Things (IoT) devices increases rapidly. In addition, there are more opportunities for users who do not understand security status of IoT devices to use these. Therefore, this article proposes a visualization system with mixed reality (MR) technology, which helps users understand security status of IoT devices around them. The proposed system introduces an image recognition technology into obtaining type and location of the device. Based on both of location of the devices and the relevant security information stored in database, the proposed system overlays color as security level and messages of recommended action on the devices. If the user reacts correctly, the reactions are stored as the action history for the device in the system. Then, the proposed system updates the security status of the devices based on the action history and the relevant security information stored in database. Installed on a head-mounted-display (HMD), the proposed system expresses appropriate security status of IoT devices more intuitively than the conventional visualization such as log-text or graph. Also, the system can express the vulnerabilities related to positional relation of the devices. Such intuitive and position-related representation of the security is expected even for non-expert to act adequately.
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