【Abstract】This special issue of the International Journal of Production Research, focuses on the 'Carbon Neutrality' and 'SCM'. Nine articles have been selected for this special issue, and they cover various aspects to understand the manifestation of 'Carbon Neutrality' in supply chains, and to further illuminate how to achieve 'Carbon Neutrality' with supply chain innovation. This editorial provides a brief overview of the research domain, then introduces each article in the context of the state-of-the-art and highlights the contributions of selected papers to the field. Finally, the research perspectives are discussed.
【Abstract】The Internet of Things (IoT) is revolutionising our everyday life by connecting a massive number of smart objects. IoT is considered a key enabler of multiple emerging applications in several areas such as manufacturing, agriculture, healthcare, automotive, smart city, etc. However, as it becomes increasingly prevalent in our life, IoT brings a number of challenging new security risks. The first issue is related to device authentication, especially with the massive number of connected devices with different types (sensors, vehicles, drones, etc.). This issue can be exploited by attackers to break into IoT networks. In addition, IoT devices generate a huge amount of confidential data that must be processed and transmitted independently without human intervention, which cannot be performed by traditional centralized security systems. Besides, the isolation imposed between different networks and the number of messages used for device's association are considered the main limitations in the two recent works. To overcome these limits, we design a novel decentralized scheme leveraging a hybridization of two main types of blockchain, local and public, which ensures authentication of things before establishing communication and exchanging information between devices. Our solution removes the isolation between different networks, contributes in reducing the number of messages required for the association phase, and solves the time delay problem imposed by the PoW consensus mechanism that is used in public blockchain as well. We adopt the Ethereum blockchain in its two versions local and public to implement our solution, and evaluate its performance as compared to the existing literature. The obtained results proved its effectiveness in terms of execution time and energy consumption which are the same metrics used in the most recent works.
