Bip39 Key Storing entropy (for instance retaining a deck of cards in a particular shuffled order) is unreliable compared to storing a mnemonic. In lieu of storing entropy, store the mnemonic created from your entropy. Steganography may be beneficial when storing the mnemonic. Backup: The moment generated, the seed phrase https://socialicus.com/story3983844/bip39-passphrase-inheritance-what-does-bip39-mean