Energy Consumption Model of a Device Supporting Information Flow Control in the IoT

In the CBAC (Capability-Based Access Control) model to make the IoT (Internet of Things) secure, subjects are issued capability tokens, i.e. a set of access rights on objects in devices, by device owners. Objects are data resource in a device which are used to store sensor data and action data. Through manipulating objects of devices, data are exchanged among subjects and objects. Here, since the illegal information flow and the late information flow occur, subjects can get data which the subjects are not allowed to get. In our previous studies, the OI (Operation Interruption) and the TBOI (Time-Based OI) protocols are implemented to interrupt operations implying both illegal and late types of information flows. In addition, two types of capability token selection algorithms are proposed to make the protocols more useful. In this paper, an electric energy consumption model of a device supporting the protocols is proposed. Based on the model, it is shown that the electric energy consumption in the OI and the TBOI protocols with capability token selection algorithms is smaller than the conventional OI and TBOI protocols.