Hey Product Hunt! 👋 As a developer concerned about digital authenticity in the age of AI, I built Image Sign to solve a real problem: how do you prove an image hasn't been tampered with? 🎯 The Problem: With deepfakes and AI-generated content everywhere, we need a way to verify image authenticity. ✅ The Solution: Cryptographic signatures embedded directly in image metadata, tied to your verified Google identity. 🔧 How it works: 1. Sign in with Google (verified identity) 2. Upload your image 3. We embed an encrypted signature in the metadata 4. Anyone can verify authenticity instantly Built this using Ed25519 signatures, AES-256 encryption, and modern web standards. It's open source and self-hostable! Perfect for photographers protecting their work, journalists verifying sources, or anyone who needs to prove image authenticity. Would love your feedback and questions! 🚀

Image Sign

Secure your digital images with cryptographic signatures

Secure your digital images with cryptographic signatures