Integration of Hardware Security Modules and Permissioned Blockchain in Industrial IoT Networks Cabrera Gutiérrez, Antonio J. Castillo Morales, María Encarnación Morales Santos, Diego Pedro Parrilla Roure, Luis Blockchain Cryptographic standards Hardware security module Hyperledger fabric Trusted platform module Hardware Security Modules (HSM) serve as a hardware based root of trust that offers physical protection while adding a new security layer in the system architecture. When combined with decentralized access technologies as Blockchain, HSM offers robustness and complete reliability enabling secured end-toend mechanisms for authenticity, authorization and integrity. This work proposes an ef cient integration of HSM and Blockchain technologies focusing on, mainly, public-key cryptography algorithms and standards, that result crucial in order to achieve a successful combination of the mentioned technologies to improve the overall security in Industrial IoT systems. To prove the suitability of the proposal and the interaction of an IoT node and a Blockchain network using HSM a proof of concept is developed. Results of time performance analysis of the prototype reveal how promising the combination of HSMs in Blockchain environments is. 2022-12-05T11:39:26Z 2022-12-05T11:39:26Z 2022-10-28 journal article A. J. Cabrera-Gutiérrez... [et al.]. "Integration of Hardware Security Modules and Permissioned Blockchain in Industrial IoT Networks," in IEEE Access, vol. 10, pp. 114331-114345, 2022, doi: [10.1109/ACCESS.2022.3217815] https://hdl.handle.net/10481/78301 10.1109/ACCESS.2022.3217815 eng info:eu-repo/grantAgreement/EC/H2020/833828 http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional IEEE