Where trust is transparent code.
A secure, transparent, and high-performance two-factor authentication extension built from the ground up with 100% visible and auditable source code. No black boxes, no telemetry, no compromises.
🛡️ Argon2id Hardening
Master key derivation using Argon2id via WebAssembly. State-of-the-art hashing resistance against GPU and ASIC brute-force attacks.
🔒 Military-Grade Encryption
Your secrets never leave your device unencrypted. We use AES-256-GCM (Authenticated Encryption with Associated Data) to keep your vault completely secure.
☁️ Drive Backup (Optional)
Store an end-to-end encrypted backup directly in your hidden Google Drive App Data folder. Only you possess the decryption password.
🌐 Fully Offline by Default
No telemetry, no external tracking, no forced cloud sync. R2D2 works completely offline to generate your 2FA codes reliably and securely.
🌍 100% Transparent
Every line of code is open-source. Zero third-party dependencies or external libraries that could be compromised.
⏱️ Smart Time Sync
Having issues with 2FA codes due to clock drift? R2D2 automatically synchronizes with server time securely to fix validation errors.