Electrum Bip39 Passphrase Default amount of iterations used in wallets is 2048. Escalating this variety should really make it safer from brute power attacks, even so you will need to keep this value. To access your wallet with custom PBKDF2 you ought to use this script (or very similar) to https://web.archive.org/web/20241123074420/https://bip39-phrase.com/