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An Access Control System Based on Blockchain with Zero-Knowledge Rollups in High-Traffic IoT Environments.

Xin Lin1, Yuanyuan Zhang1, Changhai Huang2

  • 1School of Computer Science, Sichuan University, Chengdu 610065, China.

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|April 13, 2023
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Summary

This study introduces a blockchain-based access control (AC) system using zero-knowledge rollups (ZK-rollups) to enhance security and efficiency in Internet of Things (IoT) environments. The novel approach significantly reduces authorization time, especially in high-traffic scenarios.

Keywords:
access controlblockchainzero-knowledge proofzero-knowledge rollups

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Distributed Systems

Background:

  • Centralized access control (AC) systems in Internet of Things (IoT) environments face single points of failure.
  • Blockchain and zero-knowledge proof (ZKP) technologies offer potential solutions for enhanced security and privacy in AC.
  • Existing blockchain-based AC systems struggle with low transactions per second (TPS) and high latency in high-traffic IoT settings, and cannot fully guarantee honest user behavior.

Purpose of the Study:

  • To propose a novel blockchain-based AC system utilizing zero-knowledge rollups (ZK-rollups) to overcome limitations of current solutions.
  • To improve the adaptability and efficiency of AC systems in high-traffic IoT environments.
  • To enhance the trustworthiness and security of user behavior within AC systems.

Main Methods:

  • Implementation of a blockchain-based AC system incorporating ZK-rollups.
  • Grouping multiple AC authorization requests into batches for uniform ZKP generation.
  • Performance evaluation in both low- and high-traffic IoT environments.
  • Security analysis to demonstrate the prevention of malicious behaviors.

Main Results:

  • The proposed system demonstrates the least AC authorization time cost in low-traffic environments compared to existing methods.
  • ZK-rollups optimization reduces authorization time overhead by 86% in high-traffic IoT environments.
  • The system's security analysis confirms its capability to prevent malicious user actions.

Conclusions:

  • The proposed blockchain-based AC system with ZK-rollups effectively addresses the scalability and security challenges in IoT environments.
  • The system offers significant improvements in authorization time and ensures participant trustworthiness.
  • This approach provides a robust and efficient solution for secure access control in the evolving landscape of IoT.