Bip39 History. The random mnemonic generator on this webpage utilizes a cryptographically secure random amount generator. The built-in random generator can usually be trusted a lot more than your intuition about randomness. Seed phrases are very important for accessing private keys, which can be elaborate strings of 256 alphanumeric characters. https://finance-manager16059.vigilwiki.com/6518943/the_anatomy_of_a_bip39_phrase_entropy_words_and_stability