Bip39 Standard. The passphrase just isn't selected with the predefined list of 2048 words – it could be any word or phrase you select. It is usually discouraged to create words straight from considered and make use of a secure cryptographic perform to take action. BIP-32 hierarchical deterministic wallet. BIP-39 https://bookmarkcitizen.com/story18933195/bip39-list-https-linktr-ee-bip39-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-generator