Power metering apparatus, power metering server, and power metering method based on blockchain

A power metering apparatus comprising a processor, wherein the processor is configured to:

• generate power metering data by measuring an amount of power generated by an energy source;
• generate a hash value of the power metering data by using a hash algorithm;
• generate a digitally signed hash value by applying a confidential key (private key) of the power metering apparatus based on a public-key cryptography to the hash value of the power metering data;
• transmit, to a blockchain node, a digitally signed hash value for verifying whether the power metering data is authentic;
• and
• transmit, to a power metering server, the power metering data and a unique key as an original of the measured amount of power generated by the energy source,
• wherein the unique key, which is a key for querying the digitally signed hash value of the power metering data on a blockchain, includes a power metering apparatus ID and a blockchain transaction ID.

A blockchain-based power metering method performed by a power metering server, the method comprising:

• receiving a request for storing power metering data and a unique key from a power metering apparatus;
• storing, in response to the request, one or more pieces of power metering data generated by the power metering apparatus within a preset time period and the unique key;
• verifying, when a request for access to the power metering data occurs from a power metering client, a permission to assess the power metering data that the power metering client intends to access;
• and
• transmitting, to the power metering client, the power metering data for which the permission is verified.