Patent ID: 8285984

Claim:
A network extension device for use with a known external network, the device comprising: a. a master CPU; b. a master memory connected to the master CPU; c. a protected I/O connected to the master CPU and connectable to one or more local controls and to one or more local peripherals; d. an external communications port connected to the master CPU and connectable to a known external network; e. a master trusted device connected to the master CPU such that the master trusted device can provide attestation of trusted operation of the network extension device to a known external network when the external communications port is connected thereto; f. a protected interface connected to the master CPU; g. at least one network extension module connected to the protected interface and including a local network communications port; and h. a traffic encryption module connected to the master CPU and to the master trusted device such that the master trusted device can communicate attestation of trusted operation of the traffic encryption module to a known external network when the external communications port is connected thereto.