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SIH26190SoftwareBlockchain & Cybersecurity
₹1,50,000 Prize (₹75k Joint)
•
Deadline: 20 September 2026
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Submitted Ideas: 0/500

Secure Digital Document Management System for Legal and Investigation Documents

Ministry / Organization: Ministry of Home Affairs
Department: National Crime Records Bureau (NCRB), Women Safety Division
SIH Official Portal
Technical Complexity
8/10
Dataset Accessibility
9/10
36h Hackathon Viability
9/10
Step 0 • Zero-Jargon Layman Summary

“Law enforcement and courts struggle with managing tons of sensitive paper and digital case files, leading to lost evidence, unauthorized leaks, and massive trial delays. Teams need to build a centralized, tamper-proof digital system that tracks, organizes, and secures all legal and investigative documents from FIRs to court judgments.”

The DecodeX PS Decoder™

Deconstructed Problem Blueprint

Step 1

WHAT TO BUILD?

A secure, blockchain-backed Digital Document Management System (DMS) tailored for law enforcement, investigative agencies, and judicial bodies.

Step 2

WHO IS IT FOR?

Problem faced by NCRB, Police Departments, Courts, and Legal Prosecutors. Used by investigating officers, judges, forensic experts, and legal clerks.

Step 3

WHY DOES IT EXIST?

Heavy reliance on fragmented digital storage and legacy paper files creates severe security vulnerabilities, document tampering risks, poor version control, and sluggish judicial processing.

Step 4

INPUT → PROCESS → OUTPUT ARCHITECTURE PIPELINE

01 • Inputs & Telemetry

Scanned legal documents (PDFs, images), digital FIRs, police reports, forensic lab test results, witness statements, user authentication credentials, and access request logs.

02 • Processing & AI Core

Document text extraction (OCR), AI-powered automated classification and entity masking, hashing documents onto a private blockchain for immutability, role-based access control (RBAC), and multi-factor authentication (MFA).

03 • Actionable Deliverables

Tamper-proof encrypted document vaults, real-time audit logs of every document view/edit, AI-driven smart search and document summarization dashboard, and secure inter-agency file-sharing channels.

Step 5

CONSTRAINTS

  • Must adhere strictly to Indian Evidence Act requirements for electronic records.
  • Must ensure end-to-end encryption (E2EE) both at rest and in transit.
  • Role-based permission matrix must restrict unauthorized views even within departments.
  • System must function under low-bandwidth networks common in rural police stations.
Step 6

JURY METRICS

  • Document retrieval latency under 2 seconds.
  • 100% cryptographic audit trail integrity verification success rate.
  • Accuracy of AI automated document classification and PII redaction.
  • Intuitive UX simplicity for non-technical field officers.
Step 7

CORE BOTTLENECK

Implementing a lightweight, high-performance private blockchain or immutable logging mechanism that doesn't slow down file retrieval while satisfying strict evidentiary integrity standards.

Why You Should Choose This PS (Pros)

  • Extremely high national security and social impact aligning with NCRB and Women Safety mandates.
  • Clear, structured deliverables with obvious enterprise utility.
  • Strong technological 'wow factor' combining AI, Blockchain, and advanced cryptography.

Challenges & Risks to Watch (Cons)

  • Crowded domain if teams only build a basic cloud storage app like Google Drive.
  • Requires rigorous handling of security edge cases and data compliance.
  • Balancing complex legal access rights with a simple user experience can be challenging.
Hackathon Blueprint

Recommended Tech Stack & Grand Finale Features

Frontend & Mobile
React.jsTailwind CSSShadcn UI
Backend & APIs
FastAPI (Python)Node.jsWebSockets
AI / ML & Models
Tesseract OCR / PaddleOCRHuggingFace TransformersFAISS for vector search
Database & Cloud
PostgreSQL with pgvectorIPFS or MinIO for encrypted document blobsEthereum/Hyperledger or custom SHA-256 Merkle tree ledger for audit trails

Killer Features to Impress the SIH Jury

Merkle-Tree Based Tamper Detection: Instantly flags a single modified bit in any legal PDF.
AI Legal Assistant & PII Redactor: Automatically redacts sensitive victim details in public case files and summarizes long charge sheets.
Cryptographic Chain-of-Custody Tracker: Visual timeline mapping every single time a piece of evidence or document was accessed, transferred, or viewed.
Zero-Knowledge Proof (ZKP) Access Sharing: Allows sharing case briefs with external counsels without revealing underlying confidential source files.
View Official SIH 2026 Portal Raw Text
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•Background Law enforcement agencies, courts, legal departments, and investigative organizations handle vast amounts of sensitive documents throughout the lifecycle of a case. These documents may include:
•FIRs and police reports
•Investigation records
•Witness statements
•Charge sheets
•Court filings
•Evidence records
•Forensic reports
•Legal notices and judgments Many organizations still rely on paper-based systems or fragmented digital storage solutions. This often leads to challenges such as:
•Difficulty in locating documents quickly
•Unauthorized access to confidential information
•Document tampering risks
•Lack of version control
•Inefficient collaboration between departments
•Delays in legal and investigative processes
•Poor auditability and compliance tracking As the volume of legal and investigation-related data continues to grow,there is an increasing need for a secure, centralized, and intelligent document management system that ensures data integrity, accessibility,confidentiality, and efficient case management.Modern technologies such as Cloud Computing, Artificial Intelligence (AI), Blockchain, Digital Signatures, and Secure Access Control can significantly improve the management and security of legal and investigative documents.
•Description The objective is to develop a Secure Digital Document Management System (DMS) that enables law enforcement agencies, legal institutions, and investigative departments to securely store, organize, manage,retrieve, and share sensitive legal and investigation documents.

The system should:

•Digitize and centralize document storage.
•Ensure secure access and confidentiality.
•Prevent unauthorized modifications.
•Maintain a complete audit trail of document activities.
•Enable efficient document search and retrieval.
•Support collaboration among authorized stakeholders.
•Ensure compliance with legal and regulatory requirements.

The challenge is to create a secure, scalable, and intelligent platform that streamlines document handling while preserving legal validity and evidentiary integrity.

•Expected Solution Develop a system to monitor and manage police assets throughout their lifecycle.