Weight verification device
First Claim
1. A system for verifying weight comprising:
- a digital weight indicator;
a storage device for storing electronic weight transaction data; and
an electronic weight verification device in communication with said digital weight indicator and said storage device, said electronic weight verification device adapted to modify said weight transaction data in accordance with a digital signature.
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Accused Products
Abstract
The present invention is a Weight Verification Device (WVD) that stamps a weight transaction record with a digital signature so that transaction data may be verified at a later time. The WVD is an Application Specific Integrated Circuit (ASIC) device that is installed in a sealed digital weight indicator. When a vehicle is weighed using this digital weight indicator, a weight transaction record is stamped with a digital signature and stored in a computer. The WVD may be used to confirm that the inbound and outbound weights and the date and time are accurate, that the transaction data have not been tampered with, and that the transaction as a whole has not been modified in any way since the time the transaction record was created. The digital signature stored with the transaction data is based on a secure hash of the transaction data and a “private” key belonging to an inspector from the Weights and Measures Department or a designated representative. The private key is entered into the WVD in a secure manner and is erased automatically whenever the digital weight indicator'"'"'s seal is breached.
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Citations
27 Claims
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1. A system for verifying weight comprising:
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a digital weight indicator;
a storage device for storing electronic weight transaction data; and
an electronic weight verification device in communication with said digital weight indicator and said storage device, said electronic weight verification device adapted to modify said weight transaction data in accordance with a digital signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for verifying a electronic weight transaction record generated by a digital weight indicator comprising the steps of:
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(a) generating a first digital signature based on information contained in said electronic weight transaction record;
(b) storing said first digital signature in said electronic weight transaction record;
(c) storing said electronic weight transaction record;
(d) retrieving said electronic weight transaction record; and
(e) verifying said electronic weight transaction record in accordance with said first digital signature. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An electronic weight transaction data verification apparatus comprising:
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a central processing unit adapted to execute a plurality of application software programs;
at least one memory unit adapted to store an electronic key;
a first serial port for receiving a digital weight value from a digital weight indicator;
a second serial port for receiving electronic transaction data from and transferring electronic transaction data to a data processing computer;
an application software program for generating a digital signature in accordance with said electronic key and at least a portion of said electronic weight transaction data. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification