US5966446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time-bracketing infrastructure implementation
Assignee: Intel Corp
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Filing: 1997-06-30
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Granted: 1999-10-12
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Expires: 2017-06-30
Abstract
Abstract Implemented preferably within a digital camera, an electronic device is used to prevent a captured data clip from being fraudulently altered without detection. The electronic device performs "time-bracketing" and may contain cellular phone circuitry to establish wireless communication to receive a state value used to preserve data integrity when time-stamping is performed in combination.
Inventors
- 👤 Derek L. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:09
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/32; H04L9/3247; H04L9/3297; H04L2209/00; H04L2209/80; H04L2209/805
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
109 words
An electronic device comprising: a data capture circuit to capture a data clip; and a cryptographic circuit coupled to the data capture circuit, the cryptographic circuit to preserve integrity of the data clip by establishing that the data clip was captured after publication of information including a state value, the cryptographic circuit including: a processor to perform operations on the data clip to produce a hash result, combines the state value with the hash result to produce a running hash value, and digitally signs the running hash value, and communication circuitry to establish a communication link to transmit at least the running hash value to undergo a time-stamping operation.
Claim 2
Dependent Claim
109 words
An electronic device comprising: a data capture circuit to capture a data clip; and a cryptographic circuit coupled to the data capture circuit, the cryptographic circuit to preserve integrity of the data clip by establishing that the data clip was captured after publication of information including a state value, the cryptographic circuit including: a processor to perform operations on the data clip to produce a hash result, combines the state value with the hash result to produce a running hash value, and digitally signs the running hash value, and communication circuitry to establish a communication link to transmit at least the running hash value to undergo a time-stamping operation.
Claim 3
Dependent Claim
13 words
The electronic device of claim 1, wherein the communication circuitry supports wireless communications.
Claim 4
Dependent Claim
14 words
The electronic device of claim 1, wherein the data capture circuit includes a sensor.
Claim 5
Dependent Claim
17 words
The electronic device of claim 1, wherein the cryptographic circuit further includes at least one storage element.
Claim 6
Dependent Claim
37 words
The electronic device of claim 4, wherein the at least one storage element contains a unique key pair, the running hash value and the state value loaded prior to the data capture circuit capturing the data clip.
Claim 7
Dependent Claim
22 words
The electronic device of claim 5, wherein the cryptographic circuit further includes cryptographic software contained in the at least one storage element.
Claim 8
Dependent Claim
44 words
The electronic device of claim 4, wherein the at least one storage element includes a first storage element to contain a unique key pair; a second storage element to contain the running hash value; and a third storage element to contain the state value.
Claim 9
Dependent Claim
22 words
The electronic device of claim 1, wherein the communication circuitry of the cryptographic circuit further enables the state value to be updated.
Claim 10
Dependent Claim
99 words
A data capture system comprising: a first source to capture a data clip and preserve integrity of the data clip, the first source including a data capture circuit, and a cryptographic circuit coupled to the data capture circuit, the cryptographic circuit to preserve integrity of the data clip by establishing that the data clip was captured after publication of information including a state value, to perform operations on the data clip and the state value to produce a running hash value, and to digitally sign the running hash value; and a second source in communication with the first source.
Claim 11
Dependent Claim
99 words
A data capture system comprising: a first source to capture a data clip and preserve integrity of the data clip, the first source including a data capture circuit, and a cryptographic circuit coupled to the data capture circuit, the cryptographic circuit to preserve integrity of the data clip by establishing that the data clip was captured after publication of information including a state value, to perform operations on the data clip and the state value to produce a running hash value, and to digitally sign the running hash value; and a second source in communication with the first source.
Claim 12
Dependent Claim
24 words
The data capture system of claim 9, wherein the second source performing at least an authentication operation on information transmitted from the first source.
Claim 13
Dependent Claim
19 words
The data capture system of claim 9, wherein the data capture circuit of the first source includes a sensor.
Claim 14
Dependent Claim
22 words
The data capture system of claim 9, wherein the second source performs a time-stamping operation on information including the running hash value.
Claim 15
Dependent Claim
29 words
The data capture system of claim 9, wherein the cryptographic circuit of the first source includes communication circuitry to establish a wireless communication with at least the second source.
Claim 16
Dependent Claim
24 words
The data capture system of claim 13, wherein the cryptographic circuit of the first source further includes a processor coupled to the communication circuitry.
Claim 17
Dependent Claim
22 words
The data capture system of claim 14, wherein the cryptographic circuit of the first source further includes at least one storage element.
Claim 18
Dependent Claim
42 words
The data capture system of claim 15, wherein the at least one storage element of the cryptographic circuit contains a unique key pair, the running hash value and the state value loaded prior to the data capture circuit capturing the data clip.
Claim 19
Dependent Claim
22 words
The data capture system of claim 15, wherein the at least one storage element of the cryptographic circuit further includes cryptographic software.
Claim 20
Dependent Claim
49 words
The data capture system of claim 15, wherein the at least one storage element of the cryptographic circuit includes a first storage element to contain a unique key pair; a second storage element to contain the running hash value; and a third storage element to contain the state value.
Claim 21
Independent Claim
94 words
A method for preserving integrity of a data clip transmitted from a first source to a second source, the method comprising: capturing a first data clip; performing a hashing operation on at least the first data clip to produce a running hash value; digitally signing the running hash value to produce a digital signature of the running hash value; transferring at least the digital signature to the second source through wireless communications; and performing one of a time-stamping operation and an authentication operation on at least the running hash value by the second source.
Claim 22
Independent Claim
94 words
A method for preserving integrity of a data clip transmitted from a first source to a second source, the method comprising: capturing a first data clip; performing a hashing operation on at least the first data clip to produce a running hash value; digitally signing the running hash value to produce a digital signature of the running hash value; transferring at least the digital signature to the second source through wireless communications; and performing one of a time-stamping operation and an authentication operation on at least the running hash value by the second source.
Claim 23
Dependent Claim
36 words
The method of claim 19, wherein the performing the hash operation includes concatenating a state value to the first data clip; and hashing the state value and first data clip to produce the running hash value.
Claim 24
Dependent Claim
63 words
The method of claim 19, wherein the performing the hash operation includes: performing a hashing operation on the first data frame to produce a first hash result; incorporating the hash result with the running hash value; concatenating a state value to the running hash value to produce a result; and performing a hashing operation on the result to produce the running hash value.
References Cited (Backward Citations)
US5005200A
Cited
US5189700A
Cited
US5136647A
Cited
US5136646A
Cited
US5321749A
Cited
US5422953A
Cited
US5499294A
Cited
US5751809A
Cited
US5828751A
Cited
US5764769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-11 | 2003-04-12 | 2003-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-11 | 2007-04-12 | 2007-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-11 | 2011-04-12 | 2011-10-12 | $7700.00 | Window Closed / Lapsed |