Bip39 Npm. Entropy values must be sourced from a strong supply of randomness. This suggests flipping a good coin, rolling a fair dice, noise measurements etc. Do NOT use phrases from textbooks, lyrics from tracks, your birthday or steet address, keyboard mashing, or nearly anything you think that is random, https://ajax-directory.com/listings594054/bip39-passphrase-https-linktr-ee-bip39-bip39-npm-no-further-a-mystery