Abstract: A one-way transfer system is disclosed using a shared memory. An input processor is coupled to an input interface and receives and processes input information from the input interface. The input processor is coupled to the shared memory so that information can be written to the shared memory but not read from the shared memory. The input processor writes processed input information to the shared memory. An output processor is coupled to the shared memory so that information can be read from the shared memory but not written to the shared memory. The output processor is coupled to the output interface and monitors the shared memory for new information, reads the new information, and forwards the new information to the output interface as output information. The output processor has no communications pathway to transfer any information to the input processor.

Abstract: A secure interface for a mobile communications device has output communications circuitry operable to communicate with an external network, private network communications circuitry operable to communicate with a mobile communications device, and an input/output filter connected between the output communications circuitry and the private network communications circuitry. The input/output filter separately filters, based on programmed stored criteria, externally-received information packets from the external network via the output communications circuitry and internally-received information packets from the mobile communications device via the private network communications circuitry.