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 developed a mathematical function to create a learn key from which to derive all other keys inside of a deterministic way. Mnemonic words examples https://bookmarkzap.com/story19371523/the-invalid-bip39-phrase-diaries