It seems that the weakest link in encrypted communications is the risk that a network-connected encrypting/decrypting device may be compromised and that an encryption device that is not network-connected may offer better resilience. For example, a cheap Android phone could be modified by removing all communications except Bluetooth file transfer and then used to compose and encrypt content that would then be copied to a separate connected device for transmission. The phone's software could no longer be updated, but that should not be a problem because the exposure is so low, so long as the Bluetooth technology is bullet proof. Does anyone know of anything being done like this?
