Unlike most other cryptocurrency wallets, REAL Cold Storage does not have BIP39 seed phrases. Instead, the REAL wallet’s non-electronic design utilizes BIP38 two-factor private keys. Ballet’s two-factor key generation process takes entropy (randomness) from two geographically-separated sources, which provides an additional layer of security. You can learn more about Ballet’s patented private key generation method here.
Hardware wallets and software wallets that utilize BIP39 seed phrases generate their private keys from a single source of entropy, which is a single point of failure. If the hardware device (computer, phone, or hardware wallet) that generates the BIP39 private key is compromised, then all of the crypto stored on the wallet is at risk.