Bip39 Passphrase. Entropy values have to be sourced from a robust source of randomness. This implies flipping a good coin, rolling a good dice, noise measurements and so forth. Do NOT use phrases from textbooks, lyrics from tunes, your birthday or steet tackle, keyboard mashing, or something you're thinking that https://britedirectory.com/listings13118663/bip39-ian-coleman-https-linktr-ee-bip39-getting-my-bip39-standalone-to-work