The good news is, in 2012 the developer Pieter Wuille established the BIP32 specification at The bottom in the hierarchical deterministic wallets. Collectively with it, Pieter developed a mathematical purpose to produce a grasp important from which to derive all other keys in the deterministic way. This information clarifies BIP39, https://bookmarkize.com/story19055491/considerations-to-know-about-bip39-seed-phrase-generator