1,2,3,4Department of IoT, Koneru lakshmaiah education foundation
E mail: bhupati@kluniversity.in, 2200100019@kluniversity.in, 2200100023@kluniversity.in, 2200100045@kluniversity.in
Background: Criminal Evidence Management System based on Blockchain is one of the innovative methods of protecting and preserving forensic evidence to ensure integrity and security in criminal investigations. The paper offers a detailed system that uses the blockchain technology to develop a system that manages evidence in an immutable, transparent and tamper-proof manner. It has been noted that the traditional evidence management systems have major adverse problems that may affect the judicial process and cause convictions to be wrong, such as evidence tampering, being broken, manipulation of data, and lack of transparency.
Methodology: The proposed system helps to address these issues by introducing a decentralized blockchain infrastructure that uses the cryptography hashing of SHA-256 and Proof-of-Work mining algorithms to make sure that the evidence cannot be changed. The system uses real world data of crimes with multiple sources, and it converts crime records into structured crime evidence entries inclusive of detailed metadata such as the type of evidence, chain of custody and confidence rating and investigation phase. Every bit of evidence is hashed with a cryptograph and stored in a blockchain block forming an indestructible chain of custody which can be checked any time.
Implementation and Features: The implementation proves effective processing of various types of crimes such as burglary, robbery, assault, theft, drugs, fraud, vandalism, and homicide and automated categorization of evidence into eight different types some of them being: weapon, digital, document, biological, physical, chemical, video, and audio. High-tech analytics features instant visualization of crime trends, evidence locations, blockchain integrity renderings, and time series. There are auto tamper detection systems that detect any illegitimate evidence record changes with the validation systems that confirm the integrity of the whole blockchain via hash check and chain verification.
Results: The system has high scores of 80 plus percent in terms of evidence reliability, and the operation of the blockchain validation showed zero violations of integrity. Crime mapping dashboards with highly detailed visualization allow the stakeholders to view patterns of crimes, evidence gathering, investigation cases, and priority-confidence relationships in dynamic charts and heatmaps. The platform can be connected with Google drive to have a persistent storage will provide access to the data and backup redundancy.
Conclusion: This study has shown that blockchain can transform criminal justice systems to unprecedented security, transparency, and accountability in managing evidence, which would eventually push the judicial system to more dependable and trustworthy.
Keywords: Blockchain Technology, Criminal Evidence Management, Digital Forensics, Chain of Custody, Evidence Integrity, Cryptographic Hashing, SHA-256, Proof-of-Work, Tamper Detection, Immutable Ledger
How to cite this article: CH. Bhupati, B. Sunil, S. Charmi, D. Eswar “CRIMINAL EVIDENCES MANAGEMENT SYSTEM USING BLOCKCHAIN” Int J Drug Deliv Technol. 2026;16(12s): 507-516. DOI: 10.25258/ijddt.16.12s.62.
Source of support: Nil.
Conflict of interest: None