Bip39 Checksum. The passphrase isn't selected from the predefined list of 2048 words – it can be any word or phrase you decide on. Making use of passphrases improves security and adaptability. Passphrases are a robust choice to your duress PIN because of the almost limitless number of possible wallets. https://friendlybookmark.com/story18676667/bip39-wallets-https-linktr-ee-bip39-the-fact-about-bip39-wallets-that-no-one-is-suggesting