디지털 증거물 관리의 무결성을 위한 블록체인 시스템

Abstract

This study proposes and implements a blockchain based system to ensure the integrity of digital evidence. Digitalevidence plays a crucial role in legal disputes and criminal investigations, However conventional centralized systems arevulnerable to data tampering and loss. To address these challenges, this research designs a system that guarantees the integrityof digital evidence throughout the processes of collection, storage, and verification by utilizing a private blockchain. This paperbegin by examining blockchain and various consensus algorithms, followed by a detailed description of the implementationmethods and processes of the proposed system. The system employs Ethereum-based GoQuorum to construct the privateblockchain. Also, the QBFT consensus algorithm used in this network provides high security and fast processing speeds. Bydeveloping the smart contract, we enabled the storage and retrieval of the generated hash value of digital evidence on theblockchain. Our System verifies integrity by comparing the hash value stored on the chain with the hash value of the originalimage. Consequently, the blockchain-based integrity verification system has contributed to enhancing the reliablility of digitalevidence and has improved both efficiency and security in legal proceedings.