Hewa, TharakaTharakaHewaBraeken, AnAnBraekenLiyanage, MadhusankaMadhusankaLiyanageYlianttila, MikaMikaYlianttila2023-10-172023-10-172021 IEEE2022-10IEEE Transactions on Industrial Informatics1551-3203http://hdl.handle.net/10197/24821Recent evolution of the Industrial Internet of Things (IIoT) empowers the classical manufacturing model with cloud computing integration for Industry 4.0. Cloud integration advances the capabilities of manufacturing systems with cloud-based controlling and real-time process monitoring which is renowned as Cloud Manufacturing(CM). However, cloud integration exposes the entire manufacturing ecosystem to a new set of security risks and increment in end-to-end latency. Moving security services towards the edge eradicates message routing latency towards the cloud and eliminates the central point of failure while leveraging the entire system performance. We propose a blockchain and fog computing enabled security service architecture that operates on fog nodes at the edge of manufacturing equipment clusters. The proposed service facilitates CM equipment authentication and Equipment-Cloud channel privacy protection while preserving anonymity and unlinkability over the blockchain. We implemented the proposed architecture with Hyperledger Fabric and compared the performance advantage over the state of art solutions.en© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Cloud manufacturingFog computingBlockchainSmart contracts5GIoTSecurityHyperledgerJournal Article18107174718510.1109/tii.2022.31407922022-01-08https://creativecommons.org/licenses/by-nc-nd/3.0/ie/