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TTECCDU: a blockchain-based approach for expressive authorization management.

Uzma Mahar1, Muhammad Aleem1, Ehtesham Zahoor2

  • 1National University of Computer and Emerging Sciences, Islamabad, Pakistan.

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|June 22, 2023
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Summary
This summary is machine-generated.

This study introduces TTECCDU, a novel blockchain authorization framework. It integrates multiple access control factors, enhancing expressiveness and reducing gas costs compared to existing methods.

Keywords:
Access control policiesAuthorization managementBlockchainData science

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Area of Science:

  • Computer Science
  • Information Security
  • Decentralized Systems

Background:

  • Existing blockchain authorization models often rely on single factors like trust or time.
  • This limitation results in less expressive and coarse-grained access control.
  • Smart contract implementations can be complex and incur high gas fees.

Purpose of the Study:

  • To propose a unified authorization framework incorporating multiple access control factors.
  • To address the limitations of existing single-factor and complex smart contract approaches.
  • To enhance the expressiveness and efficiency of blockchain-based authorization.

Main Methods:

  • Developed the TTECCDU framework integrating trust, cost, temporal, cardinality, and usage-based access control.
  • Implemented the framework using modular smart contracts for manageability and re-deployment.
  • Designed smart contracts to optimize gas consumption.

Main Results:

  • The TTECCDU framework offers a multi-factor, expressive authorization mechanism.
  • Modular smart contracts reduce complexity and improve manageability.
  • Performance evaluation shows significant gas cost reduction: 60.4% for trust-based and 59.2% for other contracts compared to existing approaches.

Conclusions:

  • TTECCDU provides a robust and expressive multi-factor authorization solution.
  • The modular smart contract design leads to efficient and manageable blockchain access control.
  • The framework offers substantial gas cost savings, making decentralized authorization more practical.