I'd say how the accounts are stored will depend on the client implementation, allow me to choose Wallet-cli as an example. I might also suggest you use wallet-cli to produce new accounts. Vanity-ETH simply cannot and will never retail store your private important. When you've got issues about its trustworthiness, https://trc20-wallet-address-gene63074.eedblog.com/31867962/what-does-trx-address-mean