Bip39 Seed Phrase Default number of iterations Employed in wallets is 2048. Expanding this variety should help it become safer towards brute pressure assaults, having said that you will have to keep this price. To obtain your wallet with custom PBKDF2 you need to use this script (or very similar) https://zanybookmarks.com/story18704339/bip39-mnemonic-code-bip39-an-overview