Luckily, in 2012 the developer Pieter Wuille made the BIP32 specification at The bottom in the hierarchical deterministic wallets. Together with it, Pieter developed a mathematical function to make a master key from which to derive all other keys in a very deterministic way. This informative article describes BIP39, the https://bookmarkindexing.com/story19364799/details-fiction-and-bip39