SIH 2026 |Secure Digital Document Management System for Legal & Investigation Docs| Team Threat Lens

This is our official submission for Smart India Hackathon 2026 by Team Threat Lens from RCC Institute of Information and Technology. Problem Statement ID: SIH26190 Problem Statement Title: Secure Digital Document Management System for Legal and Investigation Documents Theme: Blockchain & Cybersecurity | Category: Software | Team ID: 136203 We have built a secure, encrypted, and tamper-proof platform to digitize and manage sensitive legal documents like FIRs, charge sheets, court filings, evidence reports, and judgements. In this video, we explain our architecture, tech stack, and complete prototype demo including document encryption, version control, and real-time tamper detection via Audit Ledger. TIMESTAMPS: 00:00 - Title Page & Team Introduction 00:17 - Problem Statement SIH26190 Explained 00:34 - System Workflow & Architecture Diagram 01:48 - Core Technologies & Security Stack 02:51 - Prototype Demo: Creating a New Case (FIR-003) 03:28 - Upload & Encrypt Document - Hash & Digital Signature Generation 04:09 - Version Control System Demo (Version 2 Upload) 05:28 - Audit Ledger & Compliance Tracking 05:43 - Security Test: Simulating a Backend Attack / Data Tampering 05:58 - Tamper Detection: Audit Ledger Compromised Alert - Hash Mismatch 06:29 - Restoration & Integrity Verification KEY FEATURES OF OUR SOLUTION: • End-to-End Encryption: Documents encrypted with AES-256-GCM • Data Integrity: SHA-256 Hashing + Digital Signatures (Personal Key) for every file • Version Control: Complete version history with hash verification for old versions • Role-Based Access Control (RBAC): Separate access for Police, Investigators, Court Officials & Admin • Tamper-Proof Audit Ledger: Append-only hash chain logs every action (Who, When, What) - Detects any backend tampering instantly • Secure Storage: Encrypted & Version-Controlled Document Depository TECH STACK USED: Backend: Python 3.8+, Flask | Frontend: Jinja2, Vanilla CSS | Database: Flask SQLAlchemy (ORM) Security: Cryptography, Hashing, Digital Signatures | Authentication: Flask Sessions, RBAC Optional: Blockchain Integration for Additional Verification This project solves the critical need for confidentiality, integrity, and auditability in handling legal and investigation records. Team Threat Lens - RCCIIT Smart India Hackathon 2026 Internal Hackathon Submission If you found our solution helpful, please LIKE, SHARE & SUBSCRIBE for more SIH projects! For any queries, contact us in the comments. #SIH2026 #SmartIndiaHackathon #SIH26190 #TeamThreatLens #RCCIIT #Blockchain #CyberSecurity #LegalTech #DocumentManagementSystem #PythonFlask #SIHProject #SIHHackathon #FIRManagementSystem #DigitalIndia