Bip39 Github. Entropy values must be sourced from a solid supply of randomness. This means flipping a good coin, rolling a good dice, sound measurements etc. Do NOT use phrases from publications, lyrics from music, your birthday or steet deal with, keyboard mashing, or everything you think that is random, https://directory-empire.com/listings13118686/bip39-seed-phrase-https-linktr-ee-bip39-facts-about-bip39-checksum-revealed