Zero Trust Security in the Mist Architecture

Recently, the Internet of Things (IoT) has become popular. Fog computing is suitable for the IoT because of computation offloading. We propose the mist architecture as a model of fog computing. A mist system consists of a cloud, mist, and droplets. A conventional mist architecture is premised on boundary defense by a firewall (FW). The mist and droplets are protected by the FW. The cloud accesses the mist using network address translation traversal. However, in recent years, increasing numbers of organizations have adopted the zero trust architecture (ZTA). Additionally, the ZTA does not trust the inside of the FW. In this paper, we describe the mist architecture that realizes ZTA.