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Blockchain Based Auditable Access Control for Distributed Business Processes.

Ahmed Akhtar1, Basit Shafiq1, Jaideep Vaidya2

  • 1Computer Science Department, Lahore University of Management Sciences, Lahore, Pakistan.

Proceedings. International Conference on Distributed Computing Systems
|May 11, 2021
PubMed
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This study introduces an optimized composite access control policy for distributed applications, reducing blockchain costs and computation time. The approach ensures compliance with multiple organizational policies while enhancing auditability.

Area of Science:

  • Computer Science
  • Information Security
  • Distributed Systems

Background:

  • Blockchain technology offers auditable access control but can be costly for single-organization resources.
  • Distributed applications involve multiple resources with varying access control policies across organizational domains.
  • Existing solutions lead to repeated authorization evaluations, increasing blockchain costs and computation time.

Purpose of the Study:

  • To develop a decentralized solution for auditable access control in distributed applications.
  • To address the challenge of overlapping access control policies and reduce evaluation overhead on the blockchain.
  • To propose an approach for generating an optimal composite access control policy that minimizes cost.

Main Methods:

  • Formulating a constraint optimization problem to generate an optimal composite access control policy.
Keywords:
Access ControlBlockchainBusiness ProcessesWorkflowsXACML

Related Experiment Videos

  • Developing smart contracts for blockchain deployment and access control enforcement.
  • Utilizing a game-theoretic approach for auditing access control enforcement to minimize cost.
  • Implementing and experimentally validating the approach using Ethereum.

    • Main Results:

    • An optimal composite access control policy was generated, compliant with local policies.
    • The proposed approach significantly minimizes policy evaluation cost over the blockchain.
    • Experimental validation demonstrated the effectiveness and efficiency of the approach.
    • A method for cost-effective auditing of access control enforcement was discussed.

    Conclusions:

    • The developed approach provides an efficient and auditable decentralized access control solution for distributed applications.
    • Constraint optimization effectively addresses overlapping policies, reducing computational overhead.
    • The integration of smart contracts and game theory enhances blockchain-based access control security and auditability.