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Modbus Access Control System Based on SSI over Hyperledger Fabric Blockchain.

Santiago Figueroa-Lorenzo1,2, Javier Añorga Benito1,2, Saioa Arrizabalaga1,2

  • 1CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia/San Sebastián, Spain.

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This study enhances Modbus IIoT security using a decentralized, self-sovereign identity system on a blockchain. This approach overcomes centralized security flaws, improving scalability and maintaining Modbus

Keywords:
IIoTModbusaccess control systemauthenticationauthorizationblockchainhyperledger fabric blockchainself sovereign identity

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Industrial Control Systems

Background:

  • The Modbus protocol, widely used in Industrial Internet ofA) The Modbus protocol, widely used in Industrial Internet of Things (IIoT) systems, faces significant security challenges.
  • Existing security solutions often rely on centralized identity management, leading to single points of failure and hindering scalability due to their ad hoc nature.

Purpose of the Study:

  • To propose and evaluate a novel security framework for Modbus IIoT systems.
  • To leverage self-sovereign identity (SSI) principles integrated with blockchain technology for enhanced security.
  • To ensure the proposed solution maintains the inherent simplicity, compatibility, and interoperability of the Modbus protocol.

Main Methods:

  • Implementation of a decentralized identity management system utilizing self-sovereign identity (SSI) principles.
  • Integration of the SSI framework with the Hyperledger Fabric blockchain platform.
  • On-chain implementation of authentication and authorization mechanisms.

Main Results:

  • The proposed system effectively addresses the security vulnerabilities inherent in the traditional Modbus protocol.
  • Decentralized identity management enhances system robustness by eliminating single points of failure.
  • The solution demonstrates scalability and maintains compatibility with existing Modbus infrastructure.

Conclusions:

  • Self-sovereign identity on a Hyperledger Fabric blockchain offers a viable and secure alternative for Modbus IIoT systems.
  • The proposed approach enhances security without compromising the protocol's core attributes of simplicity and interoperability.