Without the encryption system, destructive actor Eve may well manage to publicly broadcast the same ask for, "mail 5 TRX from Alice's account to Eve's account", when no you can validate if the transaction is asked for by Alice herself. When the smart contract is deployed towards the TRON network, https://neptunedirectory.com/listings12705632/the-fact-about-tron-address-convertor-that-no-one-is-suggesting