Abstract: In par, the invention relates to a secure communication system. The system includes a voice call processing server; a user database in communication with the server; and a security gateway in communication with the server and the database, wherein the gateway transmits an encrypted signaling key and at least one encrypted media key in response to validating a mobile device using configuration data stored in the database, wherein the server tracks call traffic encrypted using the at least one media key, the call traffic routed using the Internet.