This paper proposes a Private Blockchain-enabled Digital Evidence Management System using Hyperledger Fabric and Composer to aid the activities of Law and Enforcement department. Applying the principles of decentralization and non-tamperability, the blockchain system guarantees proper registration, transfer, and verification of all digital evidence at all stages of their usage. These processes enhance the transparency and security largely eliminating the vulnerabilities of the evidence succumbing to fiddling before the legal processes. By using smart contracts, the system captures activities like evidence registration, custody transfer, among others, plus integrity verification. It also enforces exclusive controls of participation for example, only police, investigators, technicians, or attorneys are allowed to engage with the evidence. This makes efforts of trying to manage the digital evidence require minimal intervention from human beings thus increasing efficiency. Performance trials show good system performance under ‘live’ mode. In general, registration of the digital evidence lasts 23.8 ms, transfer of the evidence takes 15.1 ms, verification requires 9.4 ms and generation of the reports requires 0.8 ms.

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DEChain: Private Blockchain-Based Digital Evidence Management System

  • Mohuya Chakraborty,
  • Sudip Kumar Palit,
  • Debanjan Nag,
  • Abhirup Bag,
  • Pallabi Mondal,
  • Anupama Bain

摘要

This paper proposes a Private Blockchain-enabled Digital Evidence Management System using Hyperledger Fabric and Composer to aid the activities of Law and Enforcement department. Applying the principles of decentralization and non-tamperability, the blockchain system guarantees proper registration, transfer, and verification of all digital evidence at all stages of their usage. These processes enhance the transparency and security largely eliminating the vulnerabilities of the evidence succumbing to fiddling before the legal processes. By using smart contracts, the system captures activities like evidence registration, custody transfer, among others, plus integrity verification. It also enforces exclusive controls of participation for example, only police, investigators, technicians, or attorneys are allowed to engage with the evidence. This makes efforts of trying to manage the digital evidence require minimal intervention from human beings thus increasing efficiency. Performance trials show good system performance under ‘live’ mode. In general, registration of the digital evidence lasts 23.8 ms, transfer of the evidence takes 15.1 ms, verification requires 9.4 ms and generation of the reports requires 0.8 ms.