CypherQR

Send and receive end-to-end encrypted messages using QR codes. No servers. No accounts. No tracking. Your data stays on your device. CyperQR is a privacy-first messaging tool that uses QR codes and modern cryptography to enable secure communication without servers, accounts, or internet dependency. - How it works CyperQR uses public/private key cryptography to encrypt messages locally on your device. The encrypted message is converted into a QR code, which can be shared via any platform (WhatsApp, email, etc.). The recipient scans the QR code on a secure (offline) device and decrypts it using their private key. ⚙️ Key Features - End-to-End Encryption Uses X25519 + AES-256-GCM Only the recipient can decrypt messages - QR-Based Messaging Send encrypted messages as QR codes Scan QR codes to decrypt messages instantly - Offline Security Decryption happens entirely on-device No internet connection required - Private Key Protection Keys stored locally using strong encryption (Argon2id + SQLCipher) Private keys never leave your device No Servers, No Tracking No accounts No cloud storage No message logging