CRIMINAL EVIDENCES MANAGEMENT SYSTEM USING BLOCK CHAIN

Abstract

In traditional crime evidence management systems, all data is stored in a centralized database, making it vulnerable to tampering, unauthorized access, and manipulation by administrators. Such vulnerabilities can compromise the integrity of criminal investigations, allowing culprits to escape justice by altering or deleting critical evidence. To overcome these limitations, this project proposes a Blockchain-based Criminal Evidence Management System that ensures secure, decentralized, and tamper-proof storage of evidence data. Blockchain technology stores data in the form of blocks distributed across multiple nodes, ensuring transparency and immutability. Each block is associated with a unique cryptographic hash, and any modification in data leads to a mismatch in hash values, thereby detecting tampering instantly. The system utilizes smart contracts developed using Solidity on the Ethereum blockchain to manage evidence records securely. These smart contracts define functions for storing and retrieving evidence details, ensuring controlled access and data integrity. The proposed system enables law enforcement agencies to securely record, access, and verify criminal evidence without the risk of unauthorized modifications. Experimental implementation demonstrates improved data security, transparency, and reliability compared to traditional systems. This approach provides a robust solution for maintaining the authenticity of evidence and strengthening the criminal justice system.