⚠ Device-Local Security Model. Credentials are encrypted with AES-256-GCM using your vault password as the key derivation input via PBKDF2 (310,000 iterations). The encrypted blob is stored in localStorage — it only exists on this device in this browser. Clearing site data wipes it permanently. Store your vault password and any private keys in a dedicated password manager (Bitwarden, 1Password, etc.) before entering them here.