Patent ID: 9239247
Filing Date: 2016-01-19
CPC Classification: G01C,G05B,G06Q

Claim Text:
1. A method for accessing an aircraft network data processing system, comprising: receiving, by a first data processing device, an expected value from a hash function on the first data processing device that reflects updates to software on the first data processing device, wherein the expected value is generated by a second device other than the first data processing device; receiving, by the first data processing device, a first digital signature from the second device indicating a first source of the expected value; generating, by the first data processing device, an actual value from the hash function that reflects the updates to the software; generating on the first data processing device a second digital signature that indicates a second source of the actual value; connecting the first data processing device to the aircraft network data processing system on an aircraft through an interface, wherein the first data processing device is separate from the data processing system on the aircraft; sending the expected value and the actual value from the first data processing device to the aircraft network data processing system; sending the first digital signature and the second digital signature from first the data processing device to the aircraft network data processing system; comparing, by the aircraft network data processing system, the expected value to the actual value to determine whether the first data processing device is allowed to access the aircraft network data processing system; determining on the aircraft network data processing system whether the first digital signature and the second digital signature are from trusted or approved sources as an additional step in determining whether the first data processing device is allowed to access the aircraft network data processing system; and accessing the aircraft network data processing system by the first data processing device in response to a determination that the first data processing device is allowed to access the aircraft network data processing system.