Method and apparatus to improve ADS-B security
First Claim
1. A system for authenticating aircraft identification signals, comprising:
- a first input for receiving an annunciated aircraft position from at least one aircraft generated source, a second input for receiving a derived aircraft position from a non-aircraft generated source, indicating position of the aircraft, a comparator, for comparing the annunciated aircraft position with the derived aircraft position and generating an alarm if the annunciated aircraft position is not within a predetermined range of the derived aircraft position.
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Abstract
Security of ADS-B transmissions is improved in a first embodiment to detect position spoofing. The annunciated position source may then be compared with the derived source and a determination is made regarding the difference between the results. Any position difference greater than an amount significantly greater than the combination of the error sources is then a cause for concern and can be used to generate an alert. In a second embodiment, alerting may be based on identification spoofing. From these sources a correlated ID is available which will have an associated confidence based on the number of sources and the level of agreement on the information. Aircraft dynamics may be correlated with the announced ID for consistency. A priori information on the aircraft and location, such as schedule information, and normal operations, may be used to assist in the confidence of aircraft identity. In a third embodiment, alerting may be based on spoofing of identity and position.
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Citations
21 Claims
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1. A system for authenticating aircraft identification signals, comprising:
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a first input for receiving an annunciated aircraft position from at least one aircraft generated source, a second input for receiving a derived aircraft position from a non-aircraft generated source, indicating position of the aircraft, a comparator, for comparing the annunciated aircraft position with the derived aircraft position and generating an alarm if the annunciated aircraft position is not within a predetermined range of the derived aircraft position. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12)
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7. A system for authenticating aircraft identification signals, comprising:
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a first input for receiving an annunciated aircraft identification from at least one aircraft generated source, indicating identification of at least one of aircraft type, aircraft identification, flight identification, and aircraft performance, a second input for receiving a derived aircraft identification from a non-aircraft generated source, indicating identification of at least one of aircraft type, aircraft identification, flight identification, and aircraft performance, a comparator, for comparing the annunciated aircraft identification with the derived aircraft identification and generating an alarm if the annunciated aircraft identification is not within a predetermined range of the derived aircraft identification. - View Dependent Claims (8, 9, 10, 13)
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14. A system for authenticating aircraft identification signals, comprising:
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a first input for receiving an annunciated aircraft position and identification from at least one aircraft generated source, indicating identification of at least one of aircraft type, aircraft identification, flight identification, and aircraft performance, a second input for receiving a derived aircraft position from a non-aircraft generated source, indicating position and identification of the aircraft, indicating identification of at least one of aircraft type, aircraft identification, flight identification, and aircraft performance, a comparator, for comparing the annunciated aircraft position with the derived aircraft position and generating an alarm if the annunciated aircraft position is not within a predetermined range of the derived aircraft position, and for comparing the annunciated aircraft identification with the derived aircraft identification and generating an alarm if the annunciated aircraft identification is not within a predetermined range of the derived aircraft identification. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification