Bip 39 Passphrase Default variety of iterations used in wallets is 2048. Rising this range should help it become more secure versus brute drive attacks, on the other hand you'll have to retail store this worth. To entry your wallet with custom made PBKDF2 you should use this script (or https://bookmarkmoz.com/story18774293/bip39-seed-words-not-known-factual-statements-about-bip39-word-list