Bip39 Encoding Default range of iterations used in wallets is 2048. Escalating this range should allow it to be more secure from brute force attacks, on the other hand you will have to shop this price. To entry your wallet with customized PBKDF2 you should use this script (or similar) https://get-social-now.com/story3939082/bip39-wordlist-download-what-does-bip39-mean