Methods, systems, and computer program products for providing enhanced mobile transactions and payments are disclosed. A computer-implemented method may include providing a registry of public keys to allow users to securely exchange mobile payment data with respective trusted merchants, sending a request from a computing device of a user to validate a merchant, storing a public key for the merchant from the registry, receiving a merchant identifier from a terminal during a mobile transaction indicating that the terminal is associated with the merchant, receiving a request for information from the terminal as part of the mobile transaction, determining whether the terminal requesting the information is trusted, providing the requested information encrypted using the public key to the terminal when the terminal is trusted, and providing decoy response information to the terminal when the terminal is determined to be untrusted.