US3654604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secure communications control system
Assignee: Constellation Science and Technology Corp
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Filing: 1970-01-05
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Granted: 1972-04-04
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Expires: 1990-01-05
Abstract
Abstract A system for generating secure command signals at a remote station, such as a branch bank, under the control of a central station, such as a main bank. Random words are independently generated at each station and transmitted to the other station. Both random words are compared at each station and the comparisons are ANDed at the remote station. Exact coincidence produces the command signal.
Inventors
- 👤 Paul A Crafton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1016; G06; G06Q; G06Q20/00; G06Q20/38; G06Q20/382; H; H04; H04L; H04L1/00; H04L1/12; H04L1/14; H04L9/00; H04L9/06; H04L9/065; H04L9/0656; H04L9/0662; H04L9/32; H04L9/3271; H04L2209/00; H04L2209/12; H04L2209/56
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
4 words
GENERATING A SECOND WORD,
Claim 2
Dependent Claim
4 words
GENERATING A SECOND WORD,
Claim 3
Dependent Claim
11 words
DERIVING A FOURTH WORD FROM THE FIRST AND SECOND WORDS, AND
Claim 4
Dependent Claim
11 words
DERIVING A FOURTH WORD FROM THE FIRST AND SECOND WORDS, AND
Claim 5
Independent Claim
115 words
A method of generating a secure command signal for a remote station coupled by a communications link to a central station, comprising the ordered steps of: a. generating a first word at the remote station, b. transmitting the first word to the central station, c. generating a second word at the central station, d. deriving a third word at the central station from the first and second words, e. transmitting the second and third words to the remote station, f. deriving a fourth word at the remote station from the first and second words, and g. generating a command signal at the remote station in response to a comparison between the third and fourth words.
Claim 6
Independent Claim
115 words
A method of generating a secure command signal for a remote station coupled by a communications link to a central station, comprising the ordered steps of: a. generating a first word at the remote station, b. transmitting the first word to the central station, c. generating a second word at the central station, d. deriving a third word at the central station from the first and second words, e. transmitting the second and third words to the remote station, f. deriving a fourth word at the remote station from the first and second words, and g. generating a command signal at the remote station in response to a comparison between the third and fourth words.
Claim 7
Dependent Claim
11 words
deriving a third word from the first and second words, and
Claim 8
Dependent Claim
11 words
deriving a third word from the first and second words, and
Claim 9
Dependent Claim
17 words
A method as defined in claim 1 wherein the first and second words are random bit words.
Claim 10
Dependent Claim
15 words
PRODUCING A COMMAND SIGNAL IN RESPONSE TO A COMPARISON BETWEEN THE THIRD AND FOURTH WORDS.
Claim 11
Dependent Claim
15 words
PRODUCING A COMMAND SIGNAL IN RESPONSE TO A COMPARISON BETWEEN THE THIRD AND FOURTH WORDS.
Claim 12
Dependent Claim
11 words
DERIVING A THIRD WORD FROM THE FIRST AND SECOND WORDS, AND
Claim 13
Dependent Claim
11 words
DERIVING A THIRD WORD FROM THE FIRST AND SECOND WORDS, AND
Claim 14
Dependent Claim
15 words
producing a command signal in response to a comparison between the third and fourth words.
Claim 15
Dependent Claim
15 words
producing a command signal in response to a comparison between the third and fourth words.
Claim 16
Dependent Claim
18 words
TRANSMITTING THE SECOND AND THIRD WORDS TO THE REMOTE STATION, AND C. MEANS AT THE REMOTE STATION FOR:
Claim 17
Dependent Claim
18 words
TRANSMITTING THE SECOND AND THIRD WORDS TO THE REMOTE STATION, AND C. MEANS AT THE REMOTE STATION FOR:
Claim 18
Dependent Claim
22 words
A method as defined in claim 1 wherein the third and fourth words are derived by comparing the first and second words.
Claim 19
Dependent Claim
18 words
transmitting the second and third words to the remote station, and c. means at the remote station for:
Claim 20
Dependent Claim
18 words
transmitting the second and third words to the remote station, and c. means at the remote station for:
Claim 21
Dependent Claim
22 words
A method as defined in claim 2 wherein the third and fourth words are derived by comparing the first and second words.
Claim 22
Dependent Claim
44 words
A secure command signalling system for a remote station coupled by a communications link to a central station, comprising: a. means at the remote station for generating a first word and transmitting same to the central station, b. means at the central station for:
Claim 23
Dependent Claim
44 words
A secure command signalling system for a remote station coupled by a communications link to a central station, comprising: a. means at the remote station for generating a first word and transmitting same to the central station, b. means at the central station for:
Claim 24
Dependent Claim
24 words
A secure command signalling system as defined in claim 5 wherein the means for generating the first and second words are random bit generators.
Claim 25
Dependent Claim
22 words
A secure command signally system as defined in claim 5 wherein the means for deriving the third and fourth words are comparators.
Claim 26
Dependent Claim
22 words
A secure command signalling system as defined in claim 6 wherein the means for deriving the third and fourth words are comparators.
Claim 27
Dependent Claim
30 words
A secure command signalling system as defined in claim 7 further comprising a transformation matrix at each station for connecting one of the first or second words to the comparator.
Claim 28
Dependent Claim
30 words
A secure command signalling system as defined in claim 5 further comprising means for interleaving message bits in the traNsmission of the second and third words to the remote station.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |