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  • 1Department of Computer Science, Lahore Garrison University, Lahore 54000, Pakistan.

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Summary

This study introduces a novel blockchain-based security mechanism for Internet of Things (IoT) systems in smart cities. It ensures secure access to resources with fast authentication response times, enhancing IoT security.

Keywords:
Ethereumauthenticationauthorizationblockchaininformation securityinternet of thingssmart cities

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Smart City Technologies

Background:

  • Internet of Things (IoT) systems face significant security and privacy challenges due to their resource-constrained nature.
  • Conventional centralized security models are inadequate for the distributed and dynamic environment of IoT.
  • Blockchain technology offers a decentralized and trustless approach to address these security vulnerabilities.

Purpose of the Study:

  • To propose a novel blockchain-based security mechanism for secure authorized access to smart city resources.
  • To integrate the Authentication and Authorization for Constrained Environments (ACE) framework and the Object Security Architecture for the Internet of Things (OSCAR) model.
  • To develop a user-friendly application for interacting with heterogeneous smart city technologies.

Main Methods:

  • Developed a blockchain-based authorization mechanism using the Ethereum network.
  • Implemented an authentication mechanism using the node.js server.
  • Utilized the OSCAR model for structuring multicast groups and a meteor-based application for user interface.
  • Simulated a smart city environment using Raspberry Pi B+ and evaluated performance with mocha and chai frameworks.

Main Results:

  • The proposed mechanism enables secure authorized access to smart city resources.
  • The blockchain provides a flexible and trustless authorization framework.
  • Experimental results show an authentication response time of less than 100 ms.
  • Hand-shaking time increases with the number of clients, but overall performance remains feasible.

Conclusions:

  • The blockchain-based security mechanism effectively addresses the security concerns in IoT-based smart city systems.
  • The integration of ACE and OSCAR provides a robust solution for authentication and authorization in constrained environments.
  • The developed system demonstrates feasibility and efficiency for real-world smart city applications.