The adoption of the Internet of Things (IoT) in healthcare has received considerable interest in the past decade. Indeed, IoT-based solutions are poised to transform how we keep people safe and healthy especially as the demand for solutions to lower healthcare costs increases in the coming years. However, the heterogeneity of the things that can be connected in such environments makes interoperability among them a challenging problem. Moreover, the observations produced by these things are made available with various vocabularies and data formats. This heterogeneity prevents generic solutions from being adopted on a global scale and makes difficult to share and reuse data for other purposes than those for which they were initially set up. In this book chapter, we provide an overview of the different solutions from both technical and semantic perspectives that have been used recently to tackle the interoperability issue in such IoT environments and especially in healthcare domain. We also present an overview of semantic middleware solutions that have combined the technical and semantic techniques for a complete interoperable solution.

This article consists of a collection of slides from the author's conference presentation. Some of the specific areas/topics discussed include: our protocol for UAS is efficient and secure against an attacker with a high attack potential: in addition, it is flexible: implementer can choice the encryption scheme: and we plan to extend it to hierarchical UAS: several GSs: network with big UAV acting as cluster head.

As Internet of Things (IoT) networks keep growing with regards to the number of devices they contain, they become more attractive targets for attackers. Protecting these networks and the IoT devices they encompass is a major security challenge, and remote attestation enables checking of the integrity of devices (and thus networks). There are three categories of existing remote attestation protocols: software, hardware and hybrid attestation protocols. However, they all tackle specific issues only, such as small networks, IoT swarms, static networks, device-to-device attestation and network attestation. To provide as generic a solution as possible, which enhances security, we propose CRAFT, the first agnostic continuous remote attestation framework for IoT. CRAFT can be used in any real-world IoT network topology and can use any preexisting remote attestation protocol while remaining open to upgrades and extensions. A rigorous performance evaluation shows that CRAFT is very flexible and improves network security with little or no overhead, depending on the chosen parameters.

Publish/subscribe is a widely used paradigm in the Internet of Things (IoT). It allows a loose coupling between data producers and data consumers using a network of interconnected brokers. However, sensitive data could be exposed if a broker is compromised or if the broker itself is curious about the information that is exchanged. In this paper, we present a complete security framework for topic-based publish/subscribe systems to ensure both security and privacy at the broker level, going beyond the naive encryption of information while keeping the loose coupling between publishers and subscribers. Furthermore, the proposed solution enables user revocation at the broker level; i.e. a revoked user can no longer subscribe to published data. To achieve that, we propose a unified solution relying on attribute-based cryptography with: (1) Attribute-Based Encryption (ABE) for data encryption; (2) a new construction of Attribute-Based Keyword Search (ABKS) to allow the broker to perform an encrypted matching that enforces privacy; and (3) an Attribute-Based Signature (ABS) to enforce the data authentication.