Patent Number: 
Section: claims

1. A method for updating identity information in an aircraft network data processing system on an aircraft, comprising:receiving, by the aircraft network data processing system, updated identity information and a digital signature for the updated identity information from a data processing device connected to the aircraft network data processing system;determining, by the aircraft network data processing system, whether the digital signature is correct;determining, by the aircraft network data processing system, whether the updated identity information is newer than current identity information stored in persistent storage in the aircraft network data processing system; andresponsive to determinations that the digital signature is correct and that the updated identity information is newer than the current identity information, storing the updated identity information in the persistent storage in the aircraft network data processing system. 2. The method of claim 1 further comprising:determining, by the aircraft network data processing system, whether the data processing device is allowed to access the aircraft network data processing system using the updated identity information. 3. The method of claim 1, wherein the updated identity information comprises an updated certificate revocation list,wherein the current identity information comprises a current certificate revocation list,wherein receiving the updated identity information and the digital signature for the updated identity information from the data processing device connected to the aircraft network data processing system comprises receiving, by the aircraft network data processing system, the updated certificate revocation list and a digital signature for the updated certificate revocation list from the data processing device connected to the aircraft network data processing system,wherein determining whether the updated identity information is newer than the current identity information stored in the persistent storage in the aircraft network data processing system comprises determining, by the aircraft network data processing system, whether the updated certificate revocation list is newer than the current certificate revocation list, further wherein the current certificate revocation list is stored in the persistent storage in the aircraft network data processing system, andwherein storing the updated identity information in the persistent storage in the aircraft network data processing system comprises, responsive to determinations that the digital signature is correct and that the updated certificate revocation list is newer than the current certificate revocation list, storing the updated certificate revocation list in the persistent storage in the aircraft network data processing system. 4. The method of claim 1, wherein the updated identity information comprises updated device configuration information for a plurality of device configurations,wherein the current identity information comprises current device configuration information for the plurality of device configurations,wherein receiving the updated identity information and the digital signature for the updated identity information from the data processing device connected to the aircraft network data processing system comprises receiving, by the aircraft network data processing system, the updated device configuration information for the plurality of device configurations and a digital signature for the updated device configuration information for the plurality of device configurations from the data processing device connected to the aircraft network data processing system,wherein determining whether the updated identity information is newer than the current identity information stored in the persistent storage in the aircraft network data processing system comprises determining, by the aircraft network data processing system, whether the updated device configuration information for the plurality of device configurations is newer than the current device configuration information for the plurality of device configurations, further wherein the current device configuration information for the plurality of device configurations is stored in the persistent storage in the aircraft network data processing system, andwherein storing the updated identity information in the persistent storage in the aircraft network data processing system comprises, responsive to determinations that the digital signature is correct and that the updated device configuration information for the plurality of device configurations is newer than the current device configuration information for the plurality of device configurations, storing the updated device configuration information for the plurality of device configurations in the persistent storage in the aircraft network data processing system. 5. The method of claim 1 further comprising:receiving, by the aircraft network data processing system, an aircraft software part number for the updated identity information from the data processing device; andchanging an aircraft configuration for the aircraft using the aircraft software part number. 6. The method of claim 1, wherein the data processing device is a portable maintenance device. 7. An apparatus comprising:a processor unit on an aircraft network data processing system on an aircraft configured to:receive updated identity information and a digital signature for the updated identity information from a data processing device connected to the aircraft network data processing system;determine whether the digital signature is correct;determine whether the updated identity information is newer than current identity information stored in persistent storage in the aircraft network data processing system; andstore the updated identity information in the persistent storage in response to determinations that the digital signature is correct and that the updated identity information is newer than the current identity information. 8. The apparatus of claim 7, wherein the processor unit on the aircraft network data processing system on the aircraft is further configured to:determine whether the data processing device is allowed to access the aircraft network data processing system using the updated identity information. 9. The apparatus of claim 7, wherein the updated identity information comprises an updated certificate revocation list,wherein the current identity information comprises a current certificate revocation list,wherein the processor unit is configured to receive the updated certificate revocation list and a digital signature for the updated certificate revocation list from the data processing device connected to the aircraft network data processing system,wherein the processor unit is configured to determine whether the updated certificate revocation list is newer than the current certificate revocation list, further wherein the current certificate revocation list is stored in the persistent storage in the aircraft network data processing system, andwherein the processor unit is configured to store the updated certificate revocation list in the persistent storage in response to determinations that the digital signature is correct and that the updated certificate revocation list is newer than the current certificate revocation list. 10. The apparatus of claim 7, wherein the updated identity information comprises updated device configuration information for a plurality of device configurations,wherein the current identity information comprises current device configuration information for the plurality of device configurations,wherein the processor unit is configured to receive the updated device configuration information for the plurality of device configurations and a digital signature for the updated device configuration information for the plurality of device configurations from the data processing device connected to the aircraft network data processing system,wherein the processor unit is configured to determine whether the updated device configuration information for the plurality of device configurations is newer than the current device configuration information for the plurality of device configurations, further wherein the current device configuration information for the plurality of device configurations is stored in the persistent storage in the aircraft network data processing system, andwherein the processor unit is configured to store the updated device configuration information for the plurality of device configurations in the persistent storage in response to determinations that the digital signature is correct and that the updated device configuration information for the plurality of device configurations is newer than the current device configuration information for the plurality of device configurations. 11. The apparatus of claim 7, wherein the processor unit on the aircraft network data processing system on the aircraft is further configured to:receive an aircraft software part number for the updated identity information from the data processing device; andchange an aircraft configuration for the aircraft using the aircraft software part number. 12. The apparatus of claim 7, wherein the data processing device is a portable maintenance device. 13. A method for updating identity information in an aircraft network data processing system on an aircraft, the method comprising:connecting on the aircraft a data processing device to the aircraft network data processing system on the aircraft;sending on the aircraft from the data processing device to the aircraft network data processing system on the aircraft updated identity information, a digital signature for the updated identity information, and a time stamp for the updated identity information, the updated identity information comprising information identifying a plurality of items;sending on the aircraft the identity information for the data processing device from the data processing device to the aircraft network data processing system on the aircraft; andaccessing on the aircraft the aircraft network data processing system on the aircraft by the data processing device in response to a determination by the aircraft network data processing system on the aircraft that the data processing device is allowed to access the aircraft network data processing system on the aircraft,wherein the aircraft network data processing system on the aircraft uses the updated identity information and the identity information for the data processing device to make the determination. 14. The method of claim 13, wherein the updated identity information comprises an updated certificate revocation list,wherein the identity information for the data processing device comprises a digital certificate for the data processing device,wherein sending on the aircraft from the data processing device to the aircraft network data processing system on the aircraft the updated identity information, the digital signature for the updated identity information, and the time stamp for the updated identity information comprises sending on the aircraft from the data processing device to the aircraft network data processing system on the aircraft the updated certificate revocation list, a digital signature for the updated certificate revocation list, and a time stamp for the updated certificate revocation list, the updated certificate revocation list comprising the information identifying the plurality of items,wherein sending on the aircraft the identity information for the data processing device from the data processing device to the aircraft network data processing system on the aircraft comprises sending on the aircraft the digital certificate for the data processing device from the data processing device to the aircraft network data processing system, andwherein the aircraft network data processing system on the aircraft uses the updated certificate revocation list and the digital certificate for the data processing device to make the determination. 15. The method of claim 13, wherein the updated identity information comprises updated device configuration information for a plurality of device configurations,wherein the identity information for the data processing device comprises configuration information identifying a configuration of software on the data processing device,wherein sending on the aircraft from the data processing device to the aircraft network data processing system on the aircraft the updated identity information, the digital signature for the updated identity information, and the time stamp for the updated identity information comprises sending on the aircraft from the data processing device to the aircraft network data processing system on the aircraft the updated device configuration information for the plurality of device configurations, a digital signature for the updated device configuration information for the plurality of device configurations, and a time stamp for the updated device configuration information for the plurality of device configurations, the updated device configuration information for the plurality of device configurations comprising the information identifying the plurality of items,wherein sending on the aircraft the identity information for the data processing device from the data processing device to the aircraft network data processing system on the aircraft comprises sending on the aircraft the configuration information identifying the configuration of the software on the data processing device from the data processing device to the aircraft network data processing system, andwherein the aircraft network data processing system on the aircraft uses the updated device configuration information for the plurality of device configurations and the configuration information identifying the configuration of the software on the data processing device to make the determination. 16. The method of claim 13 further comprising sending on the aircraft an aircraft software part number for the updated identity information from the data processing device to the aircraft network data processing system on the aircraft. 17. The method of claim 13 further comprising:connecting the data processing device to a network;loading the updated identity information onto the data processing device from the network; anddisconnecting the data processing device from the network after loading the updated identity information onto the data processing device and before connecting the data processing device to the aircraft network data processing system on the aircraft. 18. The method of claim 13, wherein the data processing device is a portable maintenance device. 19. The method of claim 6, wherein the portable maintenance device is connected on the aircraft to the aircraft network data processing system with a physical connection,wherein the physical connection comprises one or more of an electric wire and a fiber optic connection,wherein the updated identity information comprises an updated certificate revocation list,wherein the current identity information comprises a current certificate revocation list,wherein receiving, by the aircraft network data processing system, the updated identity information and the digital signature for the updated identity information from the data processing device connected to the aircraft network data processing system comprises receiving, by the aircraft network data processing system, the updated certificate revocation list and a digital signature for the updated certificate revocation list from the data processing device connected to the aircraft network data processing system,wherein determining, by the aircraft network data processing system, whether the updated identity information is newer than the current identity information stored in the persistent storage in the aircraft network data processing system comprises determining, by the aircraft network data processing system, whether the updated certificate revocation list is newer than the current certificate revocation list, further wherein the current certificate revocation list is stored in the persistent storage in the aircraft network data processing system, andwherein responsive to the determinations that the digital signature is correct and that the updated identity information is newer than the current identity information, storing the updated identity information in the persistent storage in the aircraft network data processing system comprises responsive to the determinations that the digital signature is correct and that the updated certificate revocation list is newer than the current certificate revocation list, storing the updated certificate revocation list in the persistent storage in the aircraft network data processing system. 20. The method of claim 12, wherein the portable maintenance device is connected on the aircraft to the aircraft network data processing system with a physical connection,wherein the physical connection comprises one or more of an electric wire and a fiber optic connection,wherein the updated identity information comprises an updated certificate revocation list,wherein the current identity information comprises a current certificate revocation list,wherein receive the updated identity information and the digital signature for the updated identity information from the data processing device connected to the aircraft network data processing system comprises receive the updated certificate revocation list and a digital signature for the updated certificate revocation list from the data processing device connected to the aircraft network data processing system,wherein determine whether the updated identity information is newer than the current identity information stored in the persistent storage in the aircraft network data processing system comprises determine whether the updated certificate revocation list is newer than the current certificate revocation list, further wherein the current certificate revocation list is stored in the persistent storage in the aircraft network data processing system, andwherein store the updated identity information in the persistent storage in response to the determinations that the digital signature is correct and that the updated identity information is newer than the current identity information comprises store the updated certificate revocation list in the persistent storage in response to the determinations that the digital signature is correct and that the updated certificate revocation list is newer than the current certificate revocation list.