Bip39 Offline Storing entropy (for example preserving a deck of cards in a specific shuffled get) is unreliable as compared to storing a mnemonic. In place of storing entropy, keep the mnemonic generated from the entropy. Steganography may be effective when storing the mnemonic. Shop it within a protected locale: https://ledbookmark.com/story4145355/bip39-generatemnemonic-5-essential-elements-for-bip39-word-list