1. A method of executing, on a mobile device comprising a radio transceiver and a processor, independent trusted applications in the processor having a trusted security zone that comprises a master trusted security zone having a master trusted security zone key, and a plurality of subordinate trusted security zones that each have a corresponding independent key, comprising: invoking a first trusted application to execute in a first subordinate trusted security zone of the plurality of subordinate trusted security zones of the processor, the first subordinate trusted security zone comprising a first independent key that is the only key with permission to access the first subordinate trusted security zone, wherein the first trusted application is invoked by a master trusted application executing in the master trusted security zone of the processor, and wherein the master trusted application in the master trusted security zone has no access to a first memory space associated with the first subordinate trusted security zone and no access to the processing contents of the first trusted application in the first subordinate trusted security zone due to the master trusted security zone lacking the first independent key; invoking a second trusted application to execute in a second subordinate trusted security zone of the plurality of subordinate trusted security zones of the processor, the second subordinate trusted security zone comprising a second independent key that is the only key with permission to access the second subordinate trusted security zone, wherein the second trusted application is invoked by the master trusted application executing in the master trusted security zone of the processor, and wherein the master trusted application in the master trusted security zone has no access to a second memory space associated with the second subordinate trusted security zone and no access to the processing contents of the second trusted application in the second subordinate trusted security zone due to the master trusted security zone lacking the second independent key; mediating, by the master trusted security application, access to the first subordinate trusted security zone and to the second subordinate trusted security zone, wherein the processor having the trusted security zone is a main processor of the mobile device; and responsive to executing the first trusted application in the first subordinate trusted security zone, disabling, by the first trusted application while executing in the first subordinate trusted security zone, execution of all other trusted security zones including the master trusted security zone, execution of all other applications that execute outside of the first subordinate trusted security zone, and access to the radio transceiver that executes outside of any of the trusted security zones for establishing a wireless communication link, wherein the first trusted application in the first subordinate trusted security zone continues to execute while the master trusted security zone is disabled.