Bip39 Key. The random mnemonic generator on this web page uses a cryptographically secure random amount generator. The constructed-in random generator can typically be trusted more than your intuition about randomness. Passphrase values are stored from the /.tmp.tmp file about the MicroSD card. The values are encrypted with AES-256 (CTR https://financedepartment14713.wikigiogio.com/1107868/the_anatomy_of_the_bip39_phrase_entropy_terms_and_safety