System and method for electronic document issuing using blockchain and computer program for the same

1. A system for issuing electronic documents using a blockchain network, the system comprising:

a transceiver receiving identification information of a facility and status information of the facility from a complex sensor device for sensing the status of the facility and transmitting the status information of the facility to the outside, wherein the status information of the facility includes information on a temperature, a humidity, a slope, a frequency, and a crack status that are sensed at the facility;

a diagnosis unit performing a safety diagnosis on the facility and calculating a safety diagnosis grade according to a result of the performed safety diagnosis;

a transmitter retrieving the result of the performed safety diagnosis from a distributed ledger of the blockchain network in response to a request of a user device and transmitting the result of the performed safety diagnosis in a form of an electronic document; and

a data processer converting the received status information of the facility and the result of the performed safety diagnosis into a standardized data format suitable for storage in the blockchain network,

wherein the received status information of the facility and the result of the performed safety diagnosis are converted into the standardized data format through data parsing and data format changing,

wherein the diagnosis unit performs the safety diagnosis on the facility based on public data received from an external server and the status information of the facility,

wherein the blockchain network is comprised of a plurality of nodes, and the status information of the facility and the result of the performed safety diagnosis converted into the standardized data format by the data processor are stored as a data block in each of the plurality of nodes with the identification information of the facility, and

wherein the data block is stored as a file encrypted by public key cryptography using a private key and a public key.

2. The system of claim 1 , wherein the result of the performed safety diagnosis is provided as a certificate including a time of the safety diagnosis, the safety diagnosis grade, and information serving as a basis for calculating the safety diagnosis grade.

3. The system of claim 2 , wherein the information serving as the basis for calculating the safety diagnosis grade includes link information for inquiring the status information of the facility.

4. The system of claim 1 , wherein the complex sensor device includes:

a basic sensor unit including a tilt sensor, a vibration sensor, an acceleration sensor, a temperature sensor, and a humidity sensor;

an extended sensor unit capable of mounting other sensors other than the basic sensor unit;

a first communication unit transmitting sensed information of the facility to an information providing server; and

a battery supplying power to the basic sensor unit, the extended sensor unit and the first communication unit.

5. The system of claim 1 , wherein the diagnosis unit is configured to perform the safety diagnosis on the facility by comparing the public data received from the external server and the status information of the facility at a time of detecting the status information of the facility.

6. A method for issuing an electronic document using a blockchain network, the method comprising:

receiving, by a system for issuing electronic documents, status information of a facility from a complex sensor device installed in the facility, wherein the status information of the facility includes information on a temperature, a humidity, a slope, a frequency, and a crack status that are sensed at the facility;

performing, by a diagnosis unit of the system for issuing electronic documents, a safety diagnosis on the facility and calculating a safety diagnosis result for the facility;

converting, by a data processer of the system for issuing electronic documents, the received status information of the facility and the safety diagnosis result for the facility into a standardized data format suitable for storage in the blockchain network;

uploading, by the data processer, the status information of the facility and the safety diagnosis result for the facility to the blockchain network; and

retrieving, by a transmitter of the diagnosis unit, the safety diagnosis result for the facility from a distributed ledger of the blockchain network in response to a request of a user device and transmitting the safety diagnosis result for the facility in a form of an electronic document,

wherein the received status information of the facility and the safety diagnosis result for the facility are converted into the standardized data format through data parsing and data format changing,

wherein the blockchain network is comprised of a plurality of nodes, and the status information of the facility and the safety diagnosis result for the facility converted into the standardized data format by the data processor are stored as a data block in each of the plurality of nodes with identification information of the facility, and

wherein the data block is stored as a file encrypted by public key cryptography using a private key and a public key.

7. The method of claim 6 , wherein the safety diagnosis result for the facility is provided as a certificate including a time of the safety diagnosis, a safety diagnosis grade, and information serving as a basis for calculating the safety diagnosis grade.

8. The method of claim 7 , wherein the information serving as the basis for calculating the safety diagnosis grade includes link information for inquiring the status information of the facility.

9. A computer program stored in a computer-readable recording medium to execute the method for issuing an electronic document according to claim 6 in combination with hardware.

10. A computer program stored in a computer-readable recording medium to execute the method for issuing an electronic document according to claim 7 in combination with hardware.

11. A computer program stored in a computer-readable recording medium to execute the method for issuing an electronic document according to claim 8 in combination with hardware.