Bip39. Entropy values have to be sourced from a solid source of randomness. This implies flipping a good coin, rolling a good dice, sounds measurements etc. Never use phrases from publications, lyrics from tracks, your birthday or steet deal with, keyboard mashing, or just about anything you think that is https://aglocodirectory.com/listings13156301/bip39-passphrase-generator-https-linktr-ee-bip39-bip39-mnemonic-things-to-know-before-you-buy