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US 5,966,446 AGranted
Time-bracketing infrastructure implementation
AssigneeIntel Corporation
InventorDerek L. Davis
Life of this patent
Estimating the term…
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.
Claims21
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.
2 more elements
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.
2 more elements
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.
3 more elements
Dependencies are inferred from the claim text.