List B Document I9 Default number of iterations used in wallets is 2048. Expanding this range should make it more secure against brute force assaults, even so you'll have to retailer this price. To obtain your wallet with customized PBKDF2 you should use this script (or very similar) to compute https://wearethelist.com/story20410351/trust-wallet-seed-phrase-generator-bip39-can-be-fun-for-anyone