The good thing is, in 2012 the developer Pieter Wuille made the BIP32 specification at the base from the hierarchical deterministic wallets. Together with it, Pieter produced a mathematical function to produce a master critical from which to derive all other keys in the deterministic way. BIP39 and forty four, https://webcastlist.com/story20215188/5-simple-techniques-for-bip39-seed-phrase