Enhance Justice: Secure Evidence with NISHAAN's Blockchain SystemEnhance Justice: Secure Evidence with NISHAAN's Blockchain System
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Ajay's avatar
Ajay Singh Adhikari
• Apr 30
NISHAAN is a decentralized evidence management system designed to restore trust in the justice system by making digital evidence tamper-proof, verifiable, and anonymous.
Problems it solves:
1. Broken chain of custody: Evidence gets altered or mishandled when passed through multiple systems and people.
2. Deepfakes & fake timelines: No reliable way to prove when/where a video was originally recorded.
3. Whistleblower risk: Existing systems can expose identities, discouraging people from reporting crimes.
3. Centralized control risk: Admins in traditional databases can delete or manipulate evidence without trace.
Core solution:
NISHAAN replaces trust-based systems with cryptographic proof:
Stores evidence on IPFS (decentralized storage)
Anchors file hashes (CIDs) on Ethereum smart contracts
Ensures immutability (evidence cannot be altered)
Uses RBAC (Role-Based Access Control) for secure permissions
Enables anonymous submissions without identity leaks
Preserves original file integrity throughout the legal process
Key technical approach
Hybrid system: IPFS (files) + Blockchain (proof)
Smart contracts enforce strict roles (Admin, Police, Court)
“1-click adoption” keeps original file hash intact for whistleblower evidence
Client-side EXIF extraction prevents fake/old media submissions
Robust Web3 frontend handles wallet/network instability NISHAAN ensures that the exact evidence recorded is provably the same evidence presented in court—without relying on trust, only math.
Blockchain DevelopmentSolidityWeb DevelopmentEthereumMetaMaskNext.js
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