When was bip39 introduced https://www.demilked.com/author/gobnettlmz/ Mycelium - A cellular wallet that supports BIP39 seed phrases and has State-of-the-art characteristics for electrical power people. In contrast to standard wallets derived entirely from the seed phrase, passphrase-safeguarded wallets are hidden from plain sight. They exist inside a type of cryptographic shadow realm, https://www.plurk.com/p/3hf2syltjx