ZK Vault

Privacy-preserving identity verification using zero-knowledge proofs. Prove claims about yourself without revealing personal data.

# ZK Vault: Prove Anything, Reveal Nothing ZK Vault is a privacy-first browser extension that lets you prove claims about yourself without exposing personal information. Using cutting-edge zero-knowledge cryptography, verify your country, email domain, and other attributes while keeping your data completely private. ## 🔐 How It Works 1. **Generate Proofs**: Create cryptographic proofs of your attributes (country, email domain) 2. **Store Locally**: All proofs are stored in your browser - nothing goes to servers 3. **Share Selectively**: Websites can request proofs, and you control when to share ## ✨ Key Features **Country Verification** • Prove your country without revealing your exact location or IP address • Uses IP-based geolocation to determine country, then generates cryptographic proof • Only country code is revealed - your coordinates stay private **Email Domain Verification** • Prove your email domain (e.g., @gmail.com, @university.edu) without exposing your full email address • Uses DKIM signatures for cryptographic verification • Your email never leaves your device - processed locally and immediately deleted **Real Cryptography** • Groth16 zero-knowledge proofs on BN254 elliptic curve • Not mock data - actual cryptographic proofs that can be verified • Same ZK technology used by major blockchain projects **100% Private** • Your data never leaves your device • No accounts, no registration, no tracking • All proof generation happens locally in your browser • We don't operate any servers - there's nothing to collect data **Permission System** • Websites must request permission to access your proofs • You see exactly what data will be shared before approving • Revoke permissions anytime from settings • Per-website isolation - proof shared with one site doesn't leak to others **Website Integration** • Easy API for developers to integrate ZK proofs • Auto-registration flow for seamless user onboarding • Works with any web application that needs privacy-preserving verification ## 🛡️ Privacy Guarantees **What ZK Vault DOES:** ✅ Generate cryptographic proofs locally in your browser ✅ Store proofs in local browser storage only ✅ Let you share proofs with websites you trust ✅ Give you full control over your identity data **What ZK Vault DOES NOT:** ❌ Upload your data to servers ❌ Track your browsing history ❌ Share data with third parties ❌ Require accounts or login ❌ Collect analytics or telemetry ## 🎯 Use Cases **Anonymous Forums & Communities** • Verify users are from allowed countries without collecting personal info • Require proof of email domain (e.g., only @company.com) without storing emails • Build trust while maintaining anonymity **Gated Access** • Restrict access based on location without IP blocking • Verify educational email domains for student discounts • Age-restricted content without uploading government IDs **Privacy-First Applications** • Build apps that respect user privacy from the ground up • Comply with GDPR/CCPA by not collecting unnecessary data • Give users control over their identity **Decentralized Identity** • Move beyond username/password paradigm • Cryptographically provable claims without centralized identity providers • Compatible with Web3 and decentralized applications ## 🧑‍💻 For Developers Integrate ZK Vault into your website with just a few lines: ```javascript // Check if user has ZK Vault installed if (window.zkVault?.isInstalled()) { // Request a country proof with auto-registration const result = await window.zkVault.requestProof({ type: 'country', autoRegister: true, backendUrl: 'https://yoursite.com/api/register' }); // User is now verified! console.log('Country:', result.proof.publicInputs.countryCode); console.log('User token:', result.registration.token); }