Bip39 Default quantity of iterations used in wallets is 2048. Growing this quantity should help it become safer against brute power attacks, however you will need to retail store this value. To access your wallet with custom made PBKDF2 you'll want to use this script (or similar) to work out https://sociallweb.com/story3952984/bip39-nedir-helping-the-others-realize-the-advantages-of-seed-phrase-generator