Bip39 Flutter. From this issue forward the seed could be written on paper or spoken in excess of phone and this opened up new, Bodily ways of backing up the seed (many paper copies in numerous spots, sturdy copies on metal plates with excess defense from hearth/flood etcetera.). Whilst practical, https://andrepblvf.wikiannouncing.com/5708787/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability