Bip32 Vs Bip39. From this issue forward the seed could be published on paper or spoken above telephone which opened up new, Bodily means of backing up the seed (a number of paper copies in several locations, durable copies on steel plates with additional security from fire/flood etc.). gravity trophy https://johnathangscmw.governor-wiki.com/1109638/the_anatomy_of_a_bip39_phrase_entropy_phrases_and_stability