JP7274198B2 - Asset information registration method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an asset information registration method, and more particularly to a secure asset transaction mechanism using a blockchain network.

In recent years, mechanisms (platforms) have been proposed to promote the distribution of various assets (contents), whether tangible or intangible.

Patent Literature 1 proposes an electronic commerce system for buying and selling digital content. In this electronic commerce system, the seller of digital contents recovers the amount of investment in development of digital contents and the amount of investment in marketing for sales of digital contents, etc., and adjusts the price of digital contents so as to obtain a profit. set.

JP 2010-272033 A

The above-mentioned technology, for example, is borne in mind that the content is not changed like content (that is, it is distributed in the original state), and for example, information such as criminal changes based on specifications is added. no consideration has been given to doing

Accordingly, one object of the present invention is to provide a secure platform for trading assets.

According to the invention,
An asset information registration method for anonymizing asset information and storing it in a blockchain network,
a step of writing first cryptographic information obtained by encrypting at least the first information of an object into a first block in the blockchain network, and registering the first cryptographic information and the first information in a management database in association with each other;
When the first information of the object is changed, the second encrypted information encrypted based on the second information reflecting the change and the first encrypted information is transferred to the second block in the blockchain network. and registering the second encrypted information and the second information in association with each other in the management database;
including at least
allowing a user to access the management database;
a step in which the user who has acquired the second encrypted information about the object identifies the second information associated with the second encrypted information by accessing the management database;
An asset information registration method including

According to the present invention, it is possible to provide a secure platform for trading assets.

It is a figure which shows the structural example of the system by embodiment of this invention. 2 is a block diagram showing the hardware configuration of a management server in FIG. 1; FIG. 2 is a block diagram showing the hardware configuration of the user terminal in FIG. 1; FIG. 2 is a conceptual diagram of processing of the system according to the present embodiment; FIG. It is a data table example of the database managed by the management server by this Embodiment. FIG. 10 is a diagram showing an image of processing for specifying information of an object from encrypted information in the system according to the present embodiment;

The contents of the embodiments of the present invention are listed and explained. A content platform system according to an embodiment of the present invention has the following configuration.
[Item 1]
An asset information registration method for anonymizing asset information and storing it in a blockchain network,
a step of writing first cryptographic information obtained by encrypting at least the first information of an object into a first block in the blockchain network, and registering the first cryptographic information and the first information in a management database in association with each other;
When the first information of the object is changed, the second encrypted information encrypted based on the second information reflecting the change and the first encrypted information is transferred to the second block in the blockchain network. and registering the second encrypted information and the second information in association with each other in the management database;
including at least
allowing a user to access the management database;
a step in which the user who has acquired the second encrypted information about the object identifies the second information associated with the second encrypted information by accessing the management database;
Asset information registration method including
[Item 2]
The asset information registration method according to item 1,
The first information and the second information may include at least owner information and attribute information of the asset;
Asset information registration method.
[Item 3]
The asset information registration method according to item 2,
The change is a change of owner information of the object,
Asset information registration method.
[Item 4]
The asset information registration method according to any one of items 1 to 3,
the asset is a car, and the first information and the second information further include vehicle information and usage history information;
Asset information registration method.

<Details of Embodiment>
A transaction information registration system (hereinafter referred to as "system") embodying an asset information registration method according to an embodiment of the present invention will be described below with reference to the drawings.

<Overview>
The system according to the embodiment of the present invention, for example, has a history (ownership history, transaction history, status history) related to assets (property rights, ownership rights and other rights that can be traded by rights sharing entities) such as automobiles and real estate. etc.) are anonymized and traceable on the blockchain network.

<Configuration>
As shown in FIG. 1, a management server (asset management server) 1 manages assets 2a of a user (customer) 20a. The management server 1 is connected to a terminal (user terminal) 2 of a user (trader, etc.) via a network (such as the Internet, including a blockchain network) 3 .

In the present embodiment, at least the management server 1 and the user terminal 2b are connected so as to be able to access and refer to a ledger (blockchain) jointly managed in a blockchain network.

<Hardware configuration>
The management server 1 and the user terminal 2 according to this embodiment have the following hardware configurations. In addition, the following configuration is an example, and may have a configuration other than this.

<Management Server 1>
As shown in FIG. 2, the management server 1 constitutes a part of the system by executing information processing through communication with the user terminals 2a and 2b. The management server 1 may be, for example, a general-purpose computer such as a workstation or personal computer, or may be logically realized by cloud computing.

The management server 1 includes at least a processor 10 , a memory 11 , a storage 12 , a transmission/reception section 13 , an input/output section 14 and the like, which are electrically connected to each other through a bus 15 .

The processor 10 is an arithmetic device that controls the overall operation of the management server 1, controls transmission and reception of data between elements, and performs information processing necessary for executing applications. For example, the processor 10 is a CPU (Central Processing Unit), and executes a program or the like stored in the storage 12 and developed in the memory 11 to carry out each information process.

The memory 11 includes a main memory composed of a volatile memory device such as a DRAM (Dynamic Random Access Memory), and an auxiliary memory composed of a non-volatile memory device such as a flash memory or a HDD (Hard Disc Drive). . The memory 11 is used as a work area for the processor 10, and stores a BIOS (Basic Input/Output System) executed when the management server 1 is started, various setting information, and the like.

The storage 12 stores application programs and various programs such as authentication programs and mining programs for blockchain networks. A database storing data used for each process may be constructed in the storage 22 .

The transmission/reception unit 13 connects the management server 1 to the network 3 . Note that the transmitting/receiving unit 13 may include a short-range communication interface of Bluetooth (registered trademark) and BLE (Bluetooth Low Energy).

The input/output unit 14 is an information input device such as a keyboard and a mouse, and an output device such as a display, which are used as necessary.

A bus 15 is commonly connected to the above elements and transmits, for example, address signals, data signals and various control signals.

<User terminal 2>
As shown in FIG. 3 , the user terminal 2 configures a part of the delivery system by executing information processing through communication with the management server 1 . The user terminal 2 may be, for example, a general-purpose computer such as a workstation or personal computer, or may be a mobile communication device such as a smart phone.

The user terminal 2 includes at least a processor 20 , a memory 21 , a storage 22 , a transmission/reception section 23 , an input/output section 24 and the like, which are electrically connected to each other through a bus 25 .

Similar to the management server 1 described above, the processor 20 is an arithmetic device that controls the overall operation of the user terminal 2, controls transmission and reception of data between elements, and performs information processing necessary for executing applications. For example, the processor 20 is a CPU (Central Processing Unit), and executes each information processing by executing a program or the like stored in the storage 22 and developed in the memory 21 .

The memory 21 includes a main memory composed of a volatile memory device such as a DRAM (Dynamic Random Access Memory), and an auxiliary memory composed of a non-volatile memory device such as a flash memory or a HDD (Hard Disc Drive). . The memory 21 is used as a work area for the processor 20, etc., and stores a BIOS (Basic Input/Output System) executed when the user terminal 2 is started, various setting information, and the like.

The storage 22 stores application programs and various programs such as authentication programs and mining programs for blockchain networks. A database storing data used for each process may be constructed in the storage 22 .

The transmitter/receiver 23 connects the user terminal 2 to the network 3 . Note that the transmitting/receiving unit 23 may include a short-range communication interface of Bluetooth (registered trademark) and BLE (Bluetooth Low Energy).

The input/output unit 24 is an information input device such as a keyboard and a mouse, and an output device such as a display, which are used as necessary.

A bus 25 is commonly connected to each of the above elements and transmits, for example, address signals, data signals and various control signals.
<Action>

Next, the operation of this system will be described with reference to FIGS. 4 to 6. FIG. In the following embodiments, a "car" will be described as an example of a user's asset, but this system can be applied to other assets as well.

As shown in FIG. 4, the same car is transferred and traded in the order of user A, user B, and user C along the time axis. Although the automobiles Cs01 to Cs03 are all the same automobile, they are given different reference numerals because their states (mileage, etc.) differ depending on their own machines.

When the user A purchases a new car Cs01, hash information (encryption information) is generated in an arbitrary block Bk#01 on the blockchain. Hash information may use the free message function allowed in the blockchain.

The automobile Cs01 has, for example, vehicle type information R600XL, mileage 0 km, and property information such as owner A. The property information is hashed by a predetermined hash function to generate the hash information described above. As a result, hash information such as "wT098ssE" is generated in block Bk#01. At this time, at the same time, the administrator of the automobile (automobile manufacturer, automobile dealer, etc.) associates the asset information with the hash information and transmits it to the management server (the asset database (DB) of the management server contains 5 is generated (details will be described later).

Subsequently, the car Cs01 is transferred from the user A to the user B. When the user B acquires the asset information of the automobile Cs02, the vehicle type information is R600XL, the mileage is 4000 km, and the owner B is the information. At this time, new hash information is generated by hashing the new information and the already registered hash information “wT098ssE”. As a result, hash information such as "Rkpok5sZ" is generated in block Bk#02. Similar to the above, the new hash information is associated with the information of the car Cs02 and sent to the management server.

Furthermore, the car Cs02 is transferred from the user B to the user C. When the user C acquires the asset information of the automobile Cs03, the vehicle type information is R600XL, the mileage is 12000 km, there is a repair history, and the owner C is information. At this time, new hash information is generated by hashing the new information and the already registered hash information "Rkpok5sZ". As a result, hash information such as "Gq083skd" is generated in block Bk#03. Similar to the above, the new hash information is associated with the information of the car Cs03 and sent to the management server.

As described above, when a car is distributed to users A to C, hash information is generated based on the state of the car at the time of transfer and the latest hash information. Anonymized asset information will continue to exist on the blockchain.

The management server has an asset DB shown in FIG. The asset DB is a database that associates and stores hash information (ID) and corresponding asset information (including, but not limited to, vehicle type, mileage, owner, repair history, etc.). That is, by searching using hash information as a key, information corresponding to the hash information can be extracted. It should be noted that the data table of the database shown in FIG. 5 stores all the information of the automobiles Cs01 to Cs03.

Next, with reference to FIG. 6, a case where a person who wants to check property information introduces property information using this system will be described. The user is, for example, a person who is granted (partially or wholly) access authority to the management server, such as a car dealer.

For example, when the user C intends to transfer the car Cs03 to another user and consults with the store staff (user), the user acquires hash information "Gq083skd" regarding the car Cs03 from the user C. The acquisition method may be, for example, vehicle inspection, owner's card, or any other medium that allows information to be confirmed.

The user confirms whether or not the hash information "Gq083skd" exists on the blockchain. Then, the user logs in to the management server and inputs the hash information. The asset DB outputs the information of the automobile corresponding to the hash information "Gq083skd". As a result, the user can confirm on the block chain that the hash information of user C is valid, and can confirm the contents thereof in the closed asset DB.

Hash information remains on the blockchain as traceable information and cannot be tampered with, ensuring information security and prefectural labor administration.

The above-described embodiments are merely examples for facilitating understanding of the present invention, and are not intended to limit and interpret the present invention. It goes without saying that the present invention can be modified and improved without departing from its spirit, and that equivalents thereof are included in the present invention.

1 management server 2 user terminal 3 network

Claims (3)

An asset information registration method for anonymizing asset information including asset owner information and storing it in a blockchain network,
calculating a first hash value obtained by hashing the first asset information with a hash function;
writing the first hash value to a first block in the blockchain network and registering the first asset information and the first hash value in association with each other in a management database;
calculating a second hash value obtained by hashing the second asset information reflecting the change and the first hash value using the hash function when the owner information of the first asset information is changed;
writing the second hash value to a second block in the blockchain network and registering the second asset information and the second hash value in association with each other in the management database;
setting a user to be able to access the management database;
receiving an input of the second hash value from the user who acquired the second hash value , and identifying the second asset information associated with the second hash value from the management database;
asset information registration method including executing The asset information registration method according to claim 1,
the first asset information and the second asset information may include attribute information;
Asset information registration method. The asset information registration method according to claim 1 or 2 ,
The asset is an automobile, and the first asset information and the second asset information further include vehicle information and usage history information,
Asset information registration method.

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