A secure communications data processor , comprising: an airborne datalink gateway configured to: translate data, to be transmitted to, or received through, a satellite communications system from a first internet protocol to at least one of a second internet protocol or another protocol, and use a protocol to form messages, wherein the protocol wraps the messages with a protocol header comporting to the protocol, the protocol header including at least one of a message type, message number, session identification number, time stamp, and location stamp; an encryption system ; an airborne security gateway communicatively coupled to the airborne datalink gateway and coupled to the encryption system ; and a communications manager coupled to the airborne datalink gateway and the airborne security gateway and configured to manage the airborne datalink gateway and the airborne security gateway , wherein the secure communications data processor is configured to be coupled between at least one router and a satellite communications radio system , and to be installed in an aircraft separately from the at least one router and the satellite communications radio system , wherein the communications manager is configured to manage the airborne datalink gateway and the airborne security gateway by: directing the airborne security gateway to form a secure, encrypted link with a ground security gateway by using the encryption system ; and directing the airborne datalink gateway to form a datalink with a ground datalink gateway by using the secure, encrypted link with the ground security gateway. an airborne datalink gateway configured to: translate data, to be transmitted to, or received through, a satellite communications system from a first internet protocol to at least one of a second internet protocol or another protocol, and use a protocol to form messages, wherein the protocol wraps the messages with a protocol header comporting to the protocol, the protocol header including at least one of a message type, message number, session identification number, time stamp, and location stamp; an encryption system ; an airborne security gateway communicatively coupled to the airborne datalink gateway and coupled to the encryption system ; and a communications manager coupled to the airborne datalink gateway and the airborne security gateway and configured to manage the airborne datalink gateway and the airborne security gateway , wherein the secure communications data processor is configured to be coupled between at least one router and a satellite communications radio system , and to be installed in an aircraft separately from the at least one router and the satellite communications radio system , wherein the communications manager is configured to manage the airborne datalink gateway and the airborne security gateway by: directing the airborne security gateway to form a secure, encrypted link with a ground security gateway by using the encryption system ; and directing the airborne datalink gateway to form a datalink with a ground datalink gateway by using the secure, encrypted link with the ground security gateway. directing the airborne security gateway to form a secure, encrypted link with a ground security gateway by using the encryption system ; and directing the airborne datalink gateway to form a datalink with a ground datalink gateway by using the secure, encrypted link with the ground security gateway. <EOS>