SIGNET
Published by the Source. Verified by the World.
About
The problem it solves # 📌 SIGNET — Blockchain-Based Content Authenticity Verification **Trust as a Service for a World Flooded With Deepfakes** ## 🌍 The Problem The rise of AI-generated media has made it increasingly difficult to distinguish real content from fabricated misinformation. Deepfake videos, synthetic images, and manipulated documents have already caused global confusion and economic impact — from the deepfake of President Zelensky urging Ukrainian troops to stand down, to the fake Pentagon explosion image that temporarily caused the stock market to dip. **Misinformation isn't just noise anymore. It's a global threat with real-world consequences.** --- ## 🚀 SIGNET: The Cryptographic Proof of Content Authenticity SIGNET provides an immutable and trustless method for verifying the authenticity of digital content. Using **Perceptual Hashing (pHash)** and blockchain-backed storage with **gasless meta-transactions**, SIGNET ensures that any image or video can be cryptographically verified even if it has been slightly modified (compression, cropping, format conversion). ### ✔ How SIGNET Works 1. **Content Registration** (Two Modes): - **Gasless Mode**: User signs an EIP-712 typed message with their wallet, backend relayer submits the transaction via MinimalForwarder (EIP-2771) - user pays no gas 2. **Perceptual Hashing**: - Images: 16x16 pHash (256-bit) after resizing to 128x128 using LANCZOS - Videos: pHash of middle frame to resist padding/trimming attacks 3. **Blockchain Storage**: Hash stored in SignetRegistry smart contract on LISK Sepolia testnet 4. **Verification**: Upload content → Generate pHash → Compare with blockchain-indexed hashes using Hamming Distance If an organization faces a hoax, they can respond instantly with: > "This content is fake — here is the original on-chain hash proving it." **SIGNET provides mathematical, perceptual-based truth, not pixel-perfect matching.** --- ## 🔒 Why Perceptual Hashing + Blockchain? - **Tamper-resistant**: Detects modified content even after compression/cropping (unlike SHA-256) - **Immutable**: Stored hashes cannot be modified once recorded on blockchain - **Decentralized**: No single entity can modify or delete authenticity records - **Trustless**: Anyone can verify authenticity by comparing perceptual hashes - **Gasless**: Publishers don't pay gas fees thanks to EIP-2771 meta-transactions - **Privacy**: Only the perceptual hash is stored — original files never leave the user's environment --- ## 🧩 System Architecture ``` Content File → Perceptual Hash (pHash) → Gasless Meta-Transaction → SignetRegistry Contract → Event Indexer → PostgreSQL Database → Verification API ``` ### Core Components **Backend**: FastAPI with perceptual hashing (pHash 16x16), dual-mode registration (gasless EIP-712/EIP-2771), blockchain event indexer, PostgreSQL database **Frontend**: React + Vite with Wagmi Web3 integration, protected publisher routes, public verification page, admin panel **Smart Contracts**: SignetRegistry (content storage, publisher management) + MinimalForwarder (meta-transaction relayer) --- ## 💼 Business Model — "Trust as a Service" (TaaS) ### Enterprise API Target: Governments, media, social platforms, fact-checkers Features: High-throughput registration, gasless transactions, private API keys, SLA ### Professional Dashboard Target: Journalists, photographers, legal teams, investigators Features: Wallet auth, gasless registration, verification, tiered usage limits --- ## 🏗️ Tech Stack **Backend**: Python + FastAPI, PostgreSQL, Web3.py, imagehash/Pillow/OpenCV **Frontend**: React 19 + TypeScript, Vite, Wagmi, Tailwind CSS, Framer Motion **Blockchain**: Solidity on LISK Sepolia, EIP-712/EIP-2771 standards --- ## 📊 Key Technical Innovations **pHash vs SHA-256**: Perceptual similarity matching survives compression, cropping, format changes **Gasless Transactions**: Users sign EIP-712 messages, backend relayer pays gas **Publisher Authorization**: Contract owner controls who can register content --- ## 🌐 Vision In an era where AI can generate convincing fake content at scale, verifying authenticity becomes essential. SIGNET aims to become the global trust infrastructure for digital content — offering a future where truth is verifiable, immediate, and decentralized, even when content undergoes normal transformations. **We're building the perceptual trust layer of the internet.** ---