The Internet as a platform for ubiquitous communication has quickly advanced in the last years. New services have emphasized the limits of the current Internet and motivated the development of the Future Internet. Future communication infrastructures intend to be more distributed and, ideally, more secure, resulting in high complexity. Further, as new technologies emerge, new requirements and security issues are highlighted. These issues reinforce the importance of Identity Management systems for the network infrastructure in the Future Internet, termed Future Network, to provide adequate dynamic services in relation to user's personal data and requirements. Hence, this survey presents the state of the art of Identity Management systems for the Future Network. It highlights the existing architectures, specific devices applied, challenges and future perspectives.

This paper describes the preliminary results obtained towards the development of a Wireless sensor network for monitoring air quality parameters within smart city applications. The system is implemented based on distributed sensor nodes using wireless technology. Several low cost sensors were placed inside a PVC chamber in order to monitor air pollutants concentrations. To test the system, data samples were obtained around to two cities to determine the CO2 concentration and particulate material levels. Preliminary results suggest that wireless system developed may be used as a low cost tool for air pollution monitoring.

Since the emergence of the Bitcoin cryptocurrency, the blockchain technology has become the new Internet tool with which researchers claim to be able to solve any existing online problem. From immutable log ledger applications to authorisation systems applications, the current technological consensus implies that most of Internet problems could be effectively solved by deploying some form of blockchain environment. Regardless this ‘consensus’, there are decentralised Internet-based applications on which blockchain technology can actually solve several problems and improve the functionality of these applications. The development of these new blockchain-based solutions is grouped into a new paradigm called Blockchain 3.0 and its concepts go far beyond the well-known cryptocurrencies. In this paper, we study the current trends in the application of blockchain on the paradigm of Public Key Infrastructures (PKI). In particular, we focus on how these current trends can guide the exploration of a fully Decentralised Identity System, with blockchain as be part of the core technology.