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Cover image for NISHAAN is a decentralized evidence
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.
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