Methods and systems are provided for selectable data transmissions. An electronic key may be assigned to authenticated data associated with a particular user, electronic data may be encrypted, using at least part of the electronic key, to generate encrypted data, and a program code that must be executed to decrypt the encrypted data may be incorporating into the encrypted data. The encrypted data may be transmitted to a communications terminal identified by the user, and at least part of the electronic key may be transmitted to the communications terminal to cause decrypting the encrypted data using the at least part of the electronic key. The program code may be configured to cause checking one or more validation criteria associated with the encrypted data, at the communications terminal, during execution of the program code.