Secure automatic dependant surveillance
First Claim
1. A secure automatic dependant surveillance—
- broadcast system comprising;
(a) an authenticator including a unique id generator memory storing an authenticator secret key and a transmitter for transmitting the unique id to a responder;
(b) a responder including a secure hash algorithm generator combining the received unique id with a responder secret key and a data signal to generate a secure response and a transmitter transmitting the secure response and the data signal to the authenticator;
(c) the interrogator also including a receiver receiving the secure response and the data;
(d) the authenticator including an secure hash algorithm generator combining the received data and the received secure response and generating an output signal; and
a comparator for comparing the output signal with the received secure response and providing an authentication signal based on the comparison.
2 Assignments
0 Petitions
Accused Products
Abstract
A secure automatic dependant surveillance—broadcast system includes: an authenticator including a unique id generator memory storing an authenticator secret key and a transmitter for transmitting the unique id to a responder; a responder including a secure hash algorithm generator combining the received unique id with a responder secret key and a data signal to generate a secure response and a transmitter transmitting the secure response and the data signal to the authenticator; the interrogator also including a receiver receiving the secure response and the data; the authenticator including an secure hash algorithm generator combining the received data and the received secure response and generating an output signal; and a comparator for comparing the output signal with the received secure response and providing an authentication signal based on the comparison.
54 Citations
6 Claims
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1. A secure automatic dependant surveillance—
- broadcast system comprising;
(a) an authenticator including a unique id generator memory storing an authenticator secret key and a transmitter for transmitting the unique id to a responder;
(b) a responder including a secure hash algorithm generator combining the received unique id with a responder secret key and a data signal to generate a secure response and a transmitter transmitting the secure response and the data signal to the authenticator;
(c) the interrogator also including a receiver receiving the secure response and the data;
(d) the authenticator including an secure hash algorithm generator combining the received data and the received secure response and generating an output signal; and
a comparator for comparing the output signal with the received secure response and providing an authentication signal based on the comparison.
- broadcast system comprising;
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2. A method of secure automatic dependant surveillance between an
(a) authenticator and an aircraft comprising: -
(b) generating a unique ID in the authenticator;
(c) transmitting the unique ID to the aircraft;
(d) combining the received unique ID and a data signal and an aircraft secret key in a secure hash algorithm in the aircraft to generate an aircraft secure response;
(e) transmitting the data signal and the aircraft secure response to the authenticator;
(f) combining the unique id, the received data signal, and an authenticator secret key in a secure hash algorithm in the authenticator to produce an authenticator secure response; and
(g) comparing the authenticator secure response and the received secure response and generating an authentication signal depending on the results of the comparison. - View Dependent Claims (3, 4, 5, 6)
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Specification