Bip39. Because of the cryptographic design of BIP-39, a weak passphrase will not lessen the security of the other wallets or aid expose the seed words. With no passphrase, your resources are only as safe as your seed phrase. By adding a passphrase, you make yet another layer of safety https://getsocialsource.com/story5052206/bip39-wallet-https-linktr-ee-bip39-not-known-details-about-bip39-list