Bip39 format https://writeablog.net/ipennywpzc/the-ultimate-overview-to-offline-bip39-generators-remain-secure Although it takes advantage of BIP32 technique you could even now import BIP39 seeds into Electrum wallet. Also besides BIp32 there is BIP44 Edition which some wallet use for that technology of seeds. Up to now, bitcoin along with other copyright wallets were being produced a... https://express-page.com/story5655654/bip-39-index-how-bip39-wallet-can-save-you-time-stress-and-money-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw