Bip39 Standalone Default number of iterations Employed in wallets is 2048. Increasing this quantity should really help it become safer towards brute force attacks, having said that you will need to shop this benefit. To accessibility your wallet with custom made PBKDF2 you ought to use this script (or similar) https://socialicus.com/story3995621/bip39-word-list-excel-seed-phrase-generator-an-overview