Cobo Vault is an air-gapped hardware wallet that uses completely transparent QR code data transmissions so you can verify what goes in and out of it. Our Secure Element performs true random number generation (TRNG) to ensure your private keys come from real, physical sources of entropy. All transaction signing occurs entirely within the Secure Element, which has state of the art defenses to protect you in the event that an attacker has physical access to your device.