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SimBlock Simulator Enhancement with Difficulty Level Algorithm Based on Proof-of-Work Consensus for Lightweight

Viddi Mardiansyah1, Riri Fitri Sari1

  • 1Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia.

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Summary
This summary is machine-generated.

This study enhances the SimBlock simulator to better model Proof-of-Work (PoW) consensus for lightweight blockchains. Modifications allow precise analysis of hash computation and difficulty levels, aiding IoT integration.

Keywords:
Proof-of-WorkSimBlock simulatorblockchaindifficulty levellightweight blockchain

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Area of Science:

  • Computer Science
  • Blockchain Technology
  • Network Simulation

Background:

  • Proof-of-Work (PoW) is the foundational blockchain consensus protocol but suffers from high energy consumption.
  • Lightweight blockchains offer a solution for resource-constrained applications like IoT devices by simplifying algorithms without compromising security.
  • Existing simulators like SimBlock lack detailed hash computation analysis for PoW, hindering optimization.

Purpose of the Study:

  • To modify the SimBlock simulator to accurately represent PoW hash computation, including difficulty levels.
  • To analyze the impact of different difficulty levels (leading zeros vs. count zeros) on block generation time.
  • To provide recommendations for optimal difficulty levels for lightweight blockchains in IoT environments.

Main Methods:

  • Modified the SimBlock simulator to incorporate a difficulty level parameter for PoW hash target calculation.
  • Implemented two difficulty approaches: 'leading zero' (sequential zeros) and 'count zero' (arbitrary zeros).
  • Conducted experiments with 100-600 nodes, generating 100-1000 blocks, and compared results with Bitcoin and Ethereum.

Main Results:

  • Block creation using leading zeros was under 1s for levels 1-4; count zeros were under 1s for levels 1-15.
  • At higher difficulties, leading zeros took 237.4s (level 7) and count zeros took 633.8s (level 19).
  • The modifications provide clear visualization of block creation and data for difficulty level recommendations.

Conclusions:

  • The enhanced SimBlock simulator accurately models PoW hash computation and its relation to block generation time.
  • The study provides empirical data to guide the selection of appropriate difficulty levels for lightweight blockchains.
  • The findings are crucial for optimizing blockchain performance and resource utility in IoT applications.