Bip39 Passphrase. If you would like to refresh your memory about the basic principles of how copyright wallet seed phrases and passphrases work, think about examining the Vault12 posting concerning the BIP39 standard. The BIP39 standard also defines an selection for end users to add a protracted "password" of sorts https://lovelydirectory.com/listings674260/bip39-https-linktr-ee-bip39-bip39-mnemonic-generator-an-overview