Bip39 Seed Default quantity of iterations Utilized in wallets is 2048. Expanding this quantity must help it become safer towards brute power attacks, on the other hand you'll need to retailer this worth. To accessibility your wallet with custom made PBKDF2 it is best to use this script (or equivalent) https://wearethelist.com/story20523747/bip39-example-the-basic-principles-of-seed-phrase-generator