Security of Connected Devices

Connected devices have become increasingly prevalent in the daily lives of human users, forming the basis of smart spaces designed to provide valuable services, such as remote control of users' homes or efficient energy usage in large buildings. However, they also pose significant challenges, particularly in terms of security. This chapter aims to clearly define these challenges, focusing on device authentication, data confidentiality, and integrity. It begins by outlining a classical architecture for connecting devices and applications in commercial or industrial smart spaces. Various facets of this framework are explored, emphasizing the security requisites. The authors then delve into several key points of this architecture and explore the associated security needs. Current technologies are introduced, along with proof of concept from recent research work, including the promising physically unclonable function (PUF) technology, which offers a cost-effective hardware primitive for enhancing security in connected devices.