USH510H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic authentication for voice transmissions
Assignee: United States Department of the Air Force
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Filing: 1983-02-24
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Granted: 1988-08-02
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Expires: 2003-02-24
Abstract
Abstract An automatic authentication apparatus utilizing a random code generator to provide a challenge signal for transmission to a remote station. The challenge code also being converted to a response code at the sending station and stored therein. The receiving station generating a response signal to the challenge signal and transmitting the response signal to the sending station. The sending station comparing the two response signals to determine that communications with a friendly station has been established.
Inventors
- 👤 Marvin R. Clinch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:41
CPC Classifications
H; H04; H04K; H04K1/00; H04L; H04L9/00; H04L9/32; H04L9/3271
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
232 words
An automatic authentication apparatus comprising in combination: means for generating a random code, said random code generating means generating a plurality of random codes, said random code generating means randomly providing one random code of said plurality of random codes as a code output signal, means for generating signals receiving said code output signal from said random code generating means, said signal generating means converting said code output signal to an audio code signal, said audio code signal to be transmitted to a remote station, a response generating means receiving said code output signal from said random code generating means, said response generating means providing a code response signal in response to said code output signal, a memory means receiving said code response signal from said response generating means, said memory means storing said code response signal, a signal converting means to receive a challenge response signal from said remote station that is being challenged by said audio code signal, said signal converting means converting said challenge response signal to a response answer signal, and, means for comparing signals receiving said code response signal from said memory means and receiving said response answer signal from said signal converting means, said comparing means comparing said code response signal with said response answer signal, said signal comparing means providing an authentication signal when said code response signal and said response answer signal are identical.
Claim 2
Dependent Claim
232 words
An automatic authentication apparatus comprising in combination: means for generating a random code, said random code generating means generating a plurality of random codes, said random code generating means randomly providing one random code of said plurality of random codes as a code output signal, means for generating signals receiving said code output signal from said random code generating means, said signal generating means converting said code output signal to an audio code signal, said audio code signal to be transmitted to a remote station, a response generating means receiving said code output signal from said random code generating means, said response generating means providing a code response signal in response to said code output signal, a memory means receiving said code response signal from said response generating means, said memory means storing said code response signal, a signal converting means to receive a challenge response signal from said remote station that is being challenged by said audio code signal, said signal converting means converting said challenge response signal to a response answer signal, and, means for comparing signals receiving said code response signal from said memory means and receiving said response answer signal from said signal converting means, said comparing means comparing said code response signal with said response answer signal, said signal comparing means providing an authentication signal when said code response signal and said response answer signal are identical.
Claim 3
Dependent Claim
37 words
An automatic authentication apparatus as described in claim 1 further including a display/indicate means to receive said authentication signal from said comparing means, said display/indicator means providing a visual display that a correct response has been received.
Claim 4
Dependent Claim
18 words
An automatic authentication apparatus as described in claim 1 wherein said code output signal comprises a digital code.
Claim 5
Dependent Claim
21 words
An automatic authentication apparatus as described in claim 1 wherein said signal generating means comprises a digital to tone generating means.
Claim 6
Dependent Claim
21 words
An automatic authentication apparatus as described in claim 1 wherein said signal converting means comprises a tone to digital converting means.
Claim 7
Dependent Claim
17 words
An automatic authentication apparatus as described in claim 3 wherein said digital code comprises a Baudot code.
Claim 8
Dependent Claim
46 words
An automatic authentication apparatus as described in claim 1 wherein said code response signal is generated as a result of said response generating means which comprises a key entry means, and a means to combine the random code and the key to provide a controlled response.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |