Abstract

The Internet of Things has enabled the interconnection of billions of devices, which cooperate to support a large number of applications and application features. In this context, the number of the devices that need to interact to realize the desired functionalities has substantially grown, and this has rendered traditional access control methods hard to manage and ineffective. To respond to this challenge, trust-based access control has emerged, where each device is assigned a level of trust, and this level is consulted to determine whether data and operation accesses should be permitted or declined. In this chapter, we propose an approach to trust computation in the Internet of things, which synthesizes behavioral, device status and associated risk aspects into a comprehensive trust score, that can be consulted to realize trust-based access control. The proposed approach also considers device ownership relationships and owner-to-owner trust relationships, which are utilized in the trust computation process.