1. A system comprising: an electronic appliance comprising a first protected processing environment operable to encrypt data for transmission to a second protected processing environment and to decrypt data received from the second protected processing environment; and a peripheral device comprising the second protected processing environment and being communicatively coupled to the electronic appliance, the second protected processing environment being operable to encrypt data for transmission to the first protected processing environment and to decrypt data received from the first protected processing environment, the second protected processing environment comprising memory comprising instructions that, when executed by the peripheral device, are operable to read control information associated with data received from the first protected processing environment, and to enable the data received from the first protected processing environment to be used only in the manner permitted by the control information, wherein the second protected processing environment employs a processing unit that switches, based on said control information associated with data received from the first protected processing environment, from a mode associated with a lower degree of security to a protected mode associated with a higher degree of security for processing one or more instructions associated with the use of the data received from the first protected processing environment.