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US 12,723,895 B2Granted
Method, meter, and system for data audit trail
AssigneeLandis+Gyr, Inc.
InventorJürg Haas
Life of this patent
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Abstract
The present invention relates to a method of establishing a data audit trail for meter data of a meter. The method comprises the steps of capturing a meter dataset comprising at least a first value and a second value, signing the meter dataset with a first digital signature, and subsequently signing a next meter dataset and the first digital signature with a second digital signature.
Claims12
A method of establishing a data audit trail for meter data of a meter, comprising the steps of:
- capturing a meter dataset comprising at least a first value and a second value;
- generating a first hash value from the meter dataset;
- signing the first hash value with a private key of the meter to generate a first digital signature;
- generating a second hash value from a next meter dataset and the first digital signature;
- subsequently signing the second hash value with the private key of the meter to generate a second digital signature;
- and
- transmitting the meter dataset bundled with the first digital signature and the next meter dataset bundled with the second digital signature to an external device to establish the data audit trail.
4 more elements
Dependencies are inferred from the claim text.