Bip39 Standard. The passphrase just isn't selected from the predefined list of 2048 words – it could be any word or phrase you select. Any individual else who discovers the phrase can steal the bitcoins. It should be retained secret, for example it have to not be typed into any https://mysocialguides.com/story5038796/bip39-wallet-https-linktr-ee-bip39-not-known-details-about-bip39-wallets