The good news is, in 2012 the developer Pieter Wuille developed the BIP32 specification at The bottom on the hierarchical deterministic wallets. Jointly with it, Pieter developed a mathematical function to make a learn critical from which to derive all other keys within a deterministic way. The usage of BIP44 https://cheapbookmarking.com/story18770780/a-review-of-bip39