Bip39 To Private Key Default variety of iterations Employed in wallets is 2048. Growing this range ought to ensure it is more secure towards brute drive attacks, having said that you'll have to store this benefit. To accessibility your wallet with custom PBKDF2 you need to use this script (or https://bookmarkingdelta.com/story18700506/bip39-vs-slip39-the-definitive-guide-to-bip39-phrase