Trust for Data and Data Platforms in the Cyber-World

Today, the cyber-world is fast growing to support almost all activities of humans. Moreover, the cyber-world begins to be self-contained so that we can perform every activity in the cyber-world. Although the term "cyber-physical world" is still in use, we see that the "cyber" part is fast growing.In the cyber-world, devices scattered in the physical world play a critical role. Furthermore, the legal relationship among humans will be introduced into the cyber-world. Moreover, some legal relationship between humans and devices must be considered. In this paper, we extend the conventional trust relationship among human identities to the one including devices. Devices are classified as communicators and sensors/ actuators. They form a platform to collect and analyze data in the cyber-world. The trust of sensors/actuators is hard to establish because of the resource constraint. We propose "data platform" to accommodate these devices. Trust relationship in the data platform is analyzed. We discuss high trust in device registration and authentication together with communications. Based on this high trust for the limited area, we can establish trust in an economical way.