A terminal configuration apparatus is configured to receive a merchant identifier and a manufacturer identifier from a communications device, and to locate a first terminal cryptographic key that is associated with the manufacturer identifier in a terminal database. The terminal configuration apparatus is configured to confirm, using the located first terminal cryptographic key, that the merchant identifier was signed with a second terminal cryptographic key, and to download a payload to a terminal via the communications device. The located first terminal cryptographic key and the second terminal cryptographic key are an asymmetric cryptographic key pair.