BIP39 means Bitcoin Advancement Proposal 39. The words are chosen from a certain list of 2048 widespread English words which can be accustomed to the produce a binary seed (your non-public key). Standard recovery phrases use a selected list of 2048 words next the BIP39 standard (Bitcoin Advancement Proposal 39). https://mysocialport.com/story4229765/the-basic-principles-of-bip39-passphrase-generator