A Decentralized Blockchain Network for Comprehensive Evidence Protection and Integrity Assurance

Abstract

In this paper, they speak of the evidence protection system (EPS) that is a new approach to problem resolution involving contemporary legal and investigative procedures. The EPS uses the blockchain technology called Ethereum to ensure that under all the stages of the evidences life-cycle they are secured, authentic and comprehensive. Using timestamps, smart contracts, and cryptography sequencing, the system creates an evidence management platform, which is easy to read, decentralized, and cannot be hacked. The EPS stores evidence as a record that is not mutable through the use of distributed ledger technologies and digital timestamps. This is what makes it be safer than the centralized systems. smart contracts even the playing field of security and transparency by providing automation of functions such as chain of custody and access control. The integrity of data can be checked in two ways, encryption, and hashing, and keep the actual data safe. overall: the EPS provides the full solution to the issues of processing the evidence in legal environment of the current times, which is why confidence in the efficiency and credibility of evidence that is stored grows.

Introduction

The protection and management of legal and investigative evidence are critical for maintaining the integrity, transparency, and reliability of judicial processes. Traditional evidence management systems often rely on centralized databases and manual procedures, making them vulnerable to unauthorized access, data tampering, manipulation, and lack of transparency. These shortcomings can compromise evidence authenticity and reduce trust in legal proceedings.

To address these challenges, the proposed Evidence Protection System (EPS) utilizes blockchain technology to provide a secure, transparent, and tamper-resistant platform for evidence management. By leveraging blockchain's decentralized architecture, cryptographic hashing, timestamps, and smart contracts, the system ensures that evidence remains authentic, traceable, and immutable throughout its lifecycle. The platform is primarily built on the Ethereum blockchain, chosen for its strong smart contract capabilities, decentralized application (DApp) support, security features, and widespread developer ecosystem.

The literature review highlights several blockchain-based evidence management solutions that use technologies such as Ethereum, IPFS, Hyperledger, and cryptographic algorithms like AES and ECDSA to enhance evidence integrity and chain-of-custody tracking. These studies demonstrate blockchain's potential to improve transparency, prevent tampering, and strengthen digital forensic investigations. However, challenges related to scalability, real-world deployment, and implementation complexity still require further research.

The proposed EPS architecture consists of three main components:

1. User Interface – Allows users to interact with the system, submit evidence, and verify information.
2. Backend Server – Handles user authentication, authorization, transaction validation, and communication with the blockchain network.
3. Blockchain Network – Stores transaction records and evidence metadata in a decentralized ledger, ensuring transparency and immutability.

The system supports:

• User Registration and Login with secure authentication.
• Evidence Submission, where documents and files are uploaded, verified, and securely recorded.
• Evidence Verification, enabling authorized users to search, view, and validate stored evidence.
• Blockchain Integration, ensuring secure storage through decentralized ledgers, cryptographic hashing, timestamps, and automated smart contracts.
• Access Control, restricting evidence visibility to authorized individuals while maintaining auditability.

For development and testing, the system uses:

• Ethereum for blockchain infrastructure.
• Ganache as a local Ethereum testing environment for managing accounts, transactions, and smart contracts.
• MetaMask as a digital wallet for secure Ethereum transactions and interaction with decentralized applications.

Conclusion

The integrated comes from a long-term attempt to change how evidence is handled built-in blockchabuilt technology. The evidence protection systembuilt has been successfully put builtto placebuilt after a lot of hard work on development, deployment, and testing, which showed that it works and performs well built a variety of situations. Blockchabuilt technology is necessary for its efficacy integrated makes surebuilt that evidence recordsbuiltbuilt cannot be changed. The systembuilt uses blockchabuilt\'s features, like immutability, cryptographic security, transparency, and reliability, to provide robust security measures that keepbuiltbuilt sensitive evidence safe. This builttegration is a big step forward from traditional methods. It makes integrated safer bybuilt built-in cryptographic [9] measures, easier to access bybuilt lettbuiltg authorized peoplebuilt see integrated, and more reliable bybuilt integrated recordsbuiltbuilt that can\'t be changed. built-in projectbuilt milestones showsbuilt how blockchabuilt can change the way evidence is managed, makbuiltg it safer, more reliable, and more open for the court systembuilt. In conclusion, the successful use and testing of the blockchabuilt-based evidence protection systembuilt has led to a majorbuilt change built how evidence is handled. The long and careful development process has led to a powerful systembuilt that meets the high criteria of today\'sbuilt legalbuilt and builtvestigative settbuiltgs. integrated the power of Blockchabuilt [7], the systembuilt makes surebuilt that evidence recordbuiltgs can\'t be modified. It also strengthens security measures to keepbuiltbuilt sensitive databuiltbuilt safe. Blockchabuilt technology has some features that make it a excellent framework for integrated the accessibility, security, and builttegrity of proof management systems. these features built-in immutability, cryptographic security, transparency, and reliability [3]. The projectbuilt\'s successes show how blockchabuilt can totallybuilt revolutionize how evidence is handled, makbuiltg it possible to have systems built-in legalbuilt and builtvestigative integrated that are more safe, open, and efficient.

References

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Copyright

Copyright © 2026 Ms. Sumangala Pujari , G. Sandeep, Y. Sripallav, M. Vishal. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.