Bip39 Github. Entropy values should be sourced from a robust source of randomness. What this means is flipping a good coin, rolling a good dice, sounds measurements etcetera. Never use phrases from textbooks, lyrics from music, your birthday or steet tackle, keyboard mashing, or everything you think that is random, https://mpowerdirectory.com/listings685804/bip39-seed-phrase-https-linktr-ee-bip39-an-unbiased-view-of-bip39-checksum