Ledger Nano Bip39 Default number of iterations used in wallets is 2048. Increasing this range should really allow it to be safer towards brute force attacks, nonetheless you will have to retail store this value. To accessibility your wallet with tailor made PBKDF2 you need to use this script (or https://bookmarking1.com/story18655902/bip39-passphrase-empty-for-none-details-fiction-and-bip39-word-list