Vehicle event data recorder including validation of output
First Claim
1. In combination:
- a vehicle; and
an event recorder mounted to said vehicle comprising;
sensors for producing sensor signals, including;
first image sensing means for sensing optical images and for producing a first image sensor signal representing the sensed images;
a microprocessor including memory;
wherein said microprocessor receives and captures the sensor signals from said sensors during a time period and performs a validation function on said captured sensor signals so as to derive a validation value.
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Accused Products
Abstract
An event recorder (10) mounted in a vehicle (20) includes sensors, including image sensor (60), sound sensor (90), location sensor (95) , and vehicle performance sensors, and a capture circuit for storing sensed data signals around a triggering event. A CPU and program memory (74) are programmed to perform a validation function, such as a one-way hash function, on the captured sensor signal while transferring it to persistent memory device (100) so as to derive a validation value which is also stored in persistent memory device (100). To later verify that the data have not be tampered with, the stored data are operated on by the same validation function so as to derive an audit validation value, the audit validation value is compared with the validation value for equality and the outcome of the comparison is indicated.
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Citations
39 Claims
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1. In combination:
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a vehicle; and
an event recorder mounted to said vehicle comprising;
sensors for producing sensor signals, including;
first image sensing means for sensing optical images and for producing a first image sensor signal representing the sensed images;
a microprocessor including memory;
wherein said microprocessor receives and captures the sensor signals from said sensors during a time period and performs a validation function on said captured sensor signals so as to derive a validation value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. In an event recorder that has captured a sensor signal including an image signal while attached to a vehicle, a method of detecting memory tampering, the method comprising the steps of:
performing a validation function on the captured sensor signal so as to derive a validation value. - View Dependent Claims (20, 21, 22, 23, 24)
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25. In an event recorder that has captured a sensor signal including an image signal while attached to a vehicle, a method of detecting memory tampering, the method comprising the steps of:
performing a hash validation function on captured sensor signals so as to derive a valid hash value. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of detecting tampering with a captured data sensor signal including an image signal of an event recorder;
- the method comprising the steps of;
performing a validation function on the captured sensor signal so as to derive a validation value. - View Dependent Claims (36, 37, 38, 39)
- the method comprising the steps of;
Specification