Bip39. Entropy values should be sourced from a strong supply of randomness. This implies flipping a fair coin, rolling a good dice, noise measurements and so forth. Never use phrases from textbooks, lyrics from songs, your birthday or steet address, keyboard mashing, or something you think is random, mainly because https://topazdirectory.com/listings13044688/bip39-list-https-linktr-ee-bip39-rumored-buzz-on-bip39-mnemonic-code-converter-tool