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Blockchain Based Auditable Access Control For Business Processes With Event Driven Policies.

Ahmed Akhtar1, Masoud Barati2, Basit Shafiq1

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

IEEE Transactions on Dependable and Secure Computing
|October 14, 2024
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Summary
This summary is machine-generated.

This study introduces a new blockchain method for managing access control in distributed systems. The approach efficiently combines policies, reducing costs and improving auditability for complex business processes.

Keywords:
Access ControlAutomata-theoretic ApproachBlockchainBusiness ProcessesEvent-driven PoliciesWorkflows

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Area of Science:

  • Computer Science
  • Information Security
  • Distributed Systems

Background:

  • Blockchain technology offers auditable access control for resources, particularly in distributed applications like business processes and workflows.
  • Existing solutions struggle with event-driven constraints and overlapping policies in multi-domain environments, leading to high computational costs on the blockchain.
  • Decentralized auditability is crucial for distributed applications with resources governed by diverse security policies.

Purpose of the Study:

  • To develop a cost-efficient method for generating composite access control policies for distributed applications using blockchain.
  • To address the limitations of existing approaches in handling event-driven constraints and policy overlaps.
  • To reduce the overhead associated with evaluating authorizations on the blockchain.

Main Methods:

  • An automata-theoretic approach is proposed to generate a composite access control policy.
  • The problem of composite policy generation is reduced to the standard weighted set cover problem.
  • An initial prototype was implemented using Ethereum blockchain for empirical validation.

Main Results:

  • The proposed composite policy effectively captures all local access control policies.
  • A significant reduction in policy evaluation cost over the blockchain was demonstrated.
  • Empirical validation confirmed the effectiveness and efficiency of the approach, with ablation studies analyzing the impact of policy changes.

Conclusions:

  • The automata-theoretic approach provides a cost-efficient solution for composite access control policy generation in distributed blockchain applications.
  • The method successfully handles event-driven constraints and policy overlaps, mitigating issues found in prior research.
  • The implemented prototype on Ethereum validates the practical applicability and performance benefits of the proposed technique.