Bip39 Npm. Entropy values needs to be sourced from a solid source of randomness. This means flipping a good coin, rolling a good dice, sound measurements etcetera. Never use phrases from guides, lyrics from music, your birthday or steet tackle, keyboard mashing, or just about anything you believe is random, https://1-webdirectory.com/listings13055183/bip39-seed-https-linktr-ee-bip39-bip39-passphrase-generator-fundamentals-explained