A Trust Evaluation Based Attribute-Based Access Control Model for Smart Home

In modern society, smart home has become a part of people’s daily life. The smart home will generate a large amount of data to be shared inside and outside the home which is sensitive and private. Therefore, access control plays a critical role in the many issues that need to be addressed in the smart home. However, there is still a lack of an access control scheme suitable for the smart home to ensure the security of users’ data. Attribute-based access control(ABAC) is a flexible authorization model. It controls whether there is permission to operate objects through the attributes of entities, operation types, and related environments, but it cannot resist malicious attacks within the environment. Therefore, in this paper, we propose a trust-based ABAC model, which is extended on the basis of the ABAC model and applies the trust model to the smart home ABAC model to achieve fine-grained and effective access control. Our model can not only use the trust model to monitor the behavior deviation of devices in smart homes, and establish trust relationships between devices, but also control the permissions of each device. Finally, we test the trust model on the ns-3 platform and simulate the access control model on the small real Internet of Things(IoT). The results show that the trust model has good accuracy, convergence, and anti-attack, and the ABAC model has good applicability in smart home scenarios.