Bip39 Split Mnemonic Default quantity of iterations Employed in wallets is 2048. Raising this number must allow it to be more secure against brute power attacks, however you will have to keep this value. To obtain your wallet with customized PBKDF2 you'll want to use this script (or related) to https://pageoftoday.com/story3959493/bip39-implementation-not-known-facts-about-bip39-phrase