JP7520472B2 - Information management platform system and processing method thereof - Google Patents

Description

The present invention relates to an information management platform system using blockchain and its processing method, and in particular to technology that enables easy introduction of blockchain-based authentication to various services.

In recent years, a method of recording information using blockchain has become known. It is a technology that can prevent tampering by building a decentralized system using multiple computers on a network, organizing contracts for a certain period of time into blocks, and recording them on a chain while the computers verify each other. Linked blocks each have the hash value of the previous block, ensuring their continuity.

Conventionally, blockchain-based technology has been used to record transaction data on the blockchain when virtual currency is traded, and even if data is tampered with and fraudulent transactions are conducted, the reliability of the transaction data is maintained by majority vote on the data recorded in the blockchain's distributed ledger. For example, a virtual currency trading system is disclosed in Patent Document 1.

Patent Document 2 discloses a technique for efficiently leaving evidence of a contract on a blockchain even when multiple people are involved, while maintaining the format of one electronic signature per transaction, which is applied as a record of contract agreement. This disclosure discloses a procedure in which multiple devices each store a blockchain including transactions broadcast to the network in a storage unit, monitor whether the blockchain stored in the storage unit includes a transaction addressed to a shared contract address corresponding to the contract to be agreed upon, and, when a transaction addressed to the contract address is detected, generate a transaction addressed to the contract address including evidence of whether or not to agree to the contract and the electronic signature of the user of the device, and broadcast the transaction to the network.

Patent document 3 discloses an example of an application of the technology to an authentication method for devices connected to a network, in which an authentication request device issues an authentication request transaction to a distributed ledger, and an authentication response device reads and authenticates the authentication request transaction in the distributed ledger.

Patent document 4 discloses a work protection support device that uses a distributed network to easily and inexpensively perform time authentication for a desired work. The device includes a communication unit, an acquisition unit that uses the communication unit to acquire a work to which information requesting time authentication is attached, and a processing unit that controls the communication unit so that information based on the work to which information requesting time authentication is attached, acquired by the acquisition unit, is transmitted to a distributed network in which the transmitted and received information is stored together with time information.

Although various applications for blockchain technology have been proposed, as in these multiple prior art applications, in all cases storage on the blockchain involves generating and recording transactions in each system, and no technology has been proposed that would serve as a common platform.

In addition, traditional services that record information on blockchain handle the data to be recorded on the service side, which not only increases the load on the server in terms of storage space and line speed, but also poses the risk of leaks and external attacks, resulting in increased costs and difficulty in implementation.

Patent No. 6776396 Patent Publication No. 2017-220710 Patent Publication No. 2020-178344 Patent Publication No. 2016-208347

The present invention was created to solve the problems of the conventional technology described above, and aims to provide an information management platform system that easily provides information management using blockchain for various services.

In order to solve the above problems, the present invention provides an information management platform system as follows.
That is, according to a first embodiment of the present invention, an information management platform system using a blockchain is provided, which is composed of a plurality of service server devices that provide a management service for desired data, a platform server device that receives registration information including a hash value of the data from the service server device, registers the registration information in the blockchain, queries the blockchain, and authenticates the authenticity, and a communication network that connects the service server device and the platform server device, and the platform server device includes an information receiving unit that provides an API (Application Programming Interface) to the plurality of service server devices and receives the registration information through the API, a transaction issuing unit that issues a transaction related to the registration information upon receipt of the registration information, a smart contract processing unit that records the registration information in the blockchain based on the transaction from the transaction issuing unit, a query receiving unit that provides an API to the plurality of service server devices and receives at least a hash value for the registration information through the API, a search processing unit that searches whether a transaction of the queried hash value is recorded on the blockchain, and a result notification unit that notifies the service server device of the search result.

According to a second embodiment of the present invention, the registration information may be configured to include additional information related to the data together with the hash value.

According to a third embodiment of the present invention, both the service server device and the platform server device have a Web server function, and the API may be a Web API.

According to a fourth embodiment of the present invention, the data is stored and searchably managed in the service server device, while the registration information may not include data managed in the service server device.

According to a fifth embodiment of the present invention, in a configuration in which each data managed in each of the multiple service server devices is associated with member information using a management service, the platform server device is provided with a common member information processing unit that manages the member information in an integrated manner, and can provide a member information management function.

According to a sixth embodiment of the present invention, the platform server device may be provided with a common billing information processing unit that integrates and manages billing information of the multiple service server devices, and provides a function for managing billing information for each member.

According to a seventh embodiment of the present invention, the service server device is a management service that manages electronic files of documents as the data, and transmits a hash value calculated from the electronic file using a predetermined formula and signature information for the document to the information receiving unit of the platform server device via the API, and also transmits a hash value via the API to the query receiving unit of the platform server device, receives search results from the result notification unit, and displays the contract status.

According to an eighth embodiment of the present invention, the service server device is connected to a plurality of IoT (Internet Of Things) devices, the data is a communication history with the IoT devices, and a hash value calculated from the communication history using a predetermined formula and additional information related to the communication history are transmitted to the information receiving unit of the platform server device via the API, and a hash value is transmitted to the query receiving unit of the platform server device via the API, and a search result is received from the result notification unit to display the authenticity of the communication history.

The present invention can also be provided as an information processing method in an information management platform system using a blockchain.
That is, according to a ninth embodiment, an information management platform system is composed of a plurality of service server devices, a platform server device, and a communication network connecting the service server devices and the platform server device, and provides an information processing method having the steps of: transmitting registration information including a hash value of data from a service server device that provides a management service for desired data; an information receiving unit of the platform server device receiving the registration information through an API (Application Programming Interface); a transaction issuing unit of the platform server device issuing a transaction related to the registration information; and a smart contract processing unit of the platform server device recording the registration information to a blockchain based on the transaction from the transaction issuing unit.

According to a tenth embodiment of the present invention, the configuration may include a step of transmitting at least a hash value for the registration information from the service server device, a step in which a query receiving unit of the platform server device receives at least a hash value for the registration information through an API (Application Programming Interface), a step in which a search processing unit of the platform server device searches whether a transaction of the queried hash value is recorded on a blockchain, a step in which a result notification unit of the platform server device notifies the service server device of the search result, and a step in which the service server device displays the search result.

According to an eleventh embodiment of the present invention, the registration information may also include additional information related to the data together with the hash value.

According to a twelfth embodiment of the present invention, both the service server device and the platform server device have a Web server function, and the API may be a Web API.

According to a thirteenth embodiment of the present invention, the data is stored and searchably managed in the service server device, while the registration information may not include data managed in the service server device.

According to a fourteenth embodiment of the present invention, the service server device is a service that manages electronic files of documents as the data, and transmits a hash value calculated from the electronic file using a predetermined formula and signature information for the document to the information receiving unit of the platform server device via the API, and also transmits a hash value via the API to the query receiving unit of the platform server device, receives search results from the result notification unit, and displays the contract status.

According to a fifteenth embodiment of the present invention, the service server device is connected to a plurality of IoT (Internet Of Things) devices, the data is a communication history with the IoT devices, and a hash value calculated from the communication history using a predetermined formula and additional information related to the communication history are transmitted to the information receiving unit of the platform server device via the API, and a hash value is transmitted to the query receiving unit of the platform server device via the API, and a search result is received from the result notification unit to display the authenticity of the communication history.

The present invention, with the above-mentioned configuration, provides the following effects.
In other words, the operator of the service server device can manage various data such as documents and communication history with IoT devices without being limited by the content of the data, while the platform server device can provide a data authentication service by recording only the hash value on the blockchain without being involved in the content of the data.

This will make it easier to use blockchain technology, improving the reliability of data management services while also contributing to lower costs.

In addition, the platform can also be responsible for managing membership information and billing information, which means that the data itself can be managed separately from membership information and billing information, thereby increasing the security of information management.

When exchanging business documents, it is possible to safely and easily exchange proprietary formats without using standardized protocols for electronic data interchange (EDI).

1 is an overall view of an information management platform system according to the present invention; FIG. 2 is a configuration diagram of a platform server device according to the present invention. FIG. 2 is a configuration diagram of a service server device according to the present invention. FIG. 2 is a diagram illustrating a mode of providing services by the information management platform system. 3 is a flowchart of an information processing method (document registration) of the present invention. 1 is a flowchart of an information processing method (signature) of the present invention. 3 is a flowchart of an information processing method (data inquiry) of the present invention. FIG. 13 is an explanatory diagram of an example of registering seal information using the information management platform system. FIG. 11 is an explanatory diagram of an example of registering a communication history with an IoT device using an information management platform system.

Hereinafter, an embodiment of the present invention will be described based on the examples shown in the drawings. However, the embodiment is not limited to the following.
1 is an overall view of an information management platform system (1) according to the present invention. The system (1) is composed of a plurality of service server devices (20) that provide a management service for desired data, a platform server device (10) that receives registration information including a hash value of the data from the service server devices (20) and registers and queries the information in a blockchain (30) to authenticate the authenticity, and a communication network (40) such as the Internet that connects the service server devices (20) and the platform server device (10).

The service server devices each provide a management service that manages some kind of data, and generally manage data sent from the user terminals (50) of members who use the management service and from connected devices (51) (51).

In this invention, data management is defined to encompass a variety of data-related processes, such as saving and storing data, searching, extracting, and transmitting data as requested, as well as authenticating the authenticity of the data and providing information such as the date the data was created by referencing a timestamp and whether it has been updated since then.

The data to be targeted is arbitrary, and can include any information that requires objective proof, authentication, or notarization at a later date, and can handle any data, including text data, image/video data, audio data, and encrypted data.
Suitable purposes for authentication include proof of existence, proof of transaction date and time, proof of consensus formation, proof of non-tampering, and proof of authenticity.

FIG. 2 is a diagram showing the configuration of the platform server device (10).
The platform server device (10) provides an API (Application Programming Interface) to a plurality of service server devices (20). Here, the platform server device (10) has a function of a known Web server, and it is preferable that a highly versatile Web API is implemented as the API. In other words, the API that receives data required for implementing the present invention from the service server device (20) allows the device to flexibly respond to upper services of various service server devices (20).

The platform server device (10) has a general configuration of a server device arranged in a publicly known network, and can be configured with any computer such as a server, a personal computer, or a workstation. The hardware for these is publicly known, so a description is omitted.

A processing unit that performs various processes is implemented by the CPU (11) of the platform server device (10). That is, the minimum processing units required for recording registration information in the blockchain are an information receiving unit (111) that receives registration information through an API, a transaction issuing unit (112) that issues a transaction related to the registration information upon receiving the registration information, and a smart contract processing unit (113) that records the registration information in the blockchain based on the transaction from the transaction issuing unit (112).

In addition, when registering data in the blockchain (30), a time stamp obtained from a time certification authority (not shown) is also registered, making it possible to authenticate the time of the registered data and whether it has been altered. For this purpose, a time certification acquisition unit (114) that acquires a time stamp from the time certification authority may be provided.

Furthermore, in order to search for data stored in the blockchain (30), the CPU (10) is provided with a query reception unit (115) that provides an API to a plurality of service server devices (20) and receives at least a hash value for registered information through the API, a search processing unit (116) that searches whether a transaction of the queried hash value is recorded on the blockchain, and a result notification unit (117) that notifies the service server device of the search results.

Blockchain (30) is a well-known technology and will not be described in detail here, but it is a technology that makes tampering extremely difficult by linking multiple blocks such as each block in a chain on a network such as the Internet, and having the next block contain a hash value that is the result of highly complex calculations of the information in the previous block.

Because blockchains (30) are often used for virtual currency transactions, the data stored in them is generally called transaction records, but in this invention, this is applied to the storage of hash values calculated from various data, and these hash values are stored in chronological order in each block, which is a collection of records. In addition to the hash value, each block also stores the hash value of the block generated immediately before.

If someone were to attempt to tamper with information in a previously generated block, the hash value calculated from the changed block would be different from the previous one, and the hash values of all subsequent blocks would also have to be changed. Since blockchain blocks are distributed across the network and their authenticity is determined by majority vote, such changes are practically difficult, resulting in a system that does not allow tampering.

3 is a block diagram of the service server device 20 of the present invention. The service server device 20 is also configured by a known computer, as described above.
The CPU (21) includes a login processing unit (211) that performs login processing for members who use the management service, an upload reception unit (212) that receives data uploaded from user terminals and connected devices, a hash calculation unit (213) that calculates a hash value from the data using a predetermined formula, and a registration information transmission unit (215) that transmits at least the calculated hash value to the platform server device (10) as registration information.

In addition, in order to search for data stored in the blockchain (30), a hash value related to the registration information is transmitted from the registration information inquiry unit (216) using an API provided by the platform server device (10). Then, the platform server device (10) displays the results of searching for the hash value on the blockchain (30). For example, it is also possible to provide a list generation unit (217) that searches multiple data at once and displays them in a list.

The service server device (20) may have a member information DB (22) for managing members of the services it provides, and may manage the members by ID and password. The login processing unit (211) can perform login authentication processing by referring to the member information DB (22) for the ID and password entered by the member on the user terminal.

In addition, data (231) transmitted from a user terminal or a connected device, additional information (232) such as an ID and other information, and a hash value (233) calculated by the hash calculation unit (213) can be stored in a storage means (23) such as a hard disk.
This allows the member to log in and refer to the data, and the registration information reference unit (216) can extract the hash value (233) and perform processing.

The platform server device (10) and the service server device (20) are each equipped with a network adapter (15) (24) and communicate with each other via a communication network (40). The platform server device (10) can also communicate with the blockchain (30) via the communication network (40), and the service server device (20) can also communicate with user terminals and connected devices via the communication network (40).

The above-described information management platform system (1) using a blockchain can create a new form of service provision that has never existed before. Figure 4 is a diagram explaining the mode of service provision by the information management platform system.
Here, the parties are divided into an operator who operates the platform server device (10), an operator who operates the service server device (20), and end users who use the various management services provided by the service server device (20).

The platform server device (10) has the function of receiving hash and additional information and executing a smart contract on the blockchain, and can receive usage fees related to such authentication processing from the service server device operator. The service server device operator can also introduce authentication using the blockchain easily and at low cost without having to prepare a system for accessing the blockchain.

Many service server device operators make contracts with the platform server device (10), and provide services using authentication functions to end users of the higher-level services they provide. Of course, in return for this service, the end users pay a usage fee to the service server device operator.

Conventionally, authentication systems using blockchain have consistently stored data, calculated hash values, executed smart contracts, and recorded them on the blockchain, but this system can provide a new system that offers a similar authentication process to end users by a separate operator.

In addition, providing an authentication function that cannot be tampered with increases the added value of the management service, thereby increasing the value of the usage fees from end users to the service server device operator, and ultimately the usage fees from the service server device operator to the platform server device.

In this way, the service server device (20) can manage various types of data, but in this embodiment, we will explain the case where electronic document files are handled as an example of data. For example, we are assuming a service that manages the existence of contract documents and the parties involved.

FIG. 5 shows a processing method for registering a document.
First, the login processing unit (211) performs login processing (S10) from the member's user terminal (50) using a known login method. If the user is confirmed to be a member by referring to the member information DB (22), the user terminal (50) enters a logged-in state.
In the present invention, the service server device (20) is not necessarily limited to a mode in which only members can use the service, and the login process (S10) may not be performed.

In a logged-in state, the member uploads (S11) a document such as a contract. Specifically, the member designates an electronic file stored in the user terminal (50) and transmits it, which is received by the upload reception unit (212) of the service server device (20) and stored (S12) as data (231) in the storage means (23).

At this stage, the parties may sign the document or immediately proceed to record the document in the blockchain. This embodiment is an example of the latter, in which the hash value calculation unit (213) calculates a hash value of the electronic file using a predetermined hash function (S13). The hash function can be determined arbitrarily, but well-known examples include SHA256 and RIPEMD160.
The calculated hash value is stored in the hash value data (233) of the storage means (23) in association with the data (231) relating to the document.

In order to provide document management services to users, the service server device (20) stores not only the electronic files and hash values of documents, but also various other data in association with them. Table 1 shows an example.

In Table 1, from the left, there is a management number as a serial number of the data, the date the document was registered, the calculated hash value, the signature status, the file name of the electronic file, the date of the transaction if a transaction was made, and the transaction amount. The additional information generation unit (214) of the service server device (20) generates and records each piece of information.
Entered into the signature status is the email address of the party who signed the document.

When recording in the blockchain, additional information can be appropriately selected from various additional information (232). In this embodiment, the email address included in the signature state is included as registration information. That is, the registration information sending unit (215) sends (S14) to the platform server device (10) the hash value "1234abc" and the signature "aaa@hoge.com.jp/ bbb@example.com".

When registration information is received through an API provided by the information receiving unit (111) of the platform server device (10), the transaction issuing unit (112) issues a transaction related to the registration information (S15). Furthermore, the smart contract processing unit (115) records the registration information in the blockchain (30) based on the transaction from the transaction issuing unit (S16).

As a result of this series of steps, the hash value and signature status of the document stored in the service server device (20) are recorded in the blockchain (30), making it impossible to change, for example, the content of the document or the signer.
At the same time, since the platform server device (10) only temporarily receives the hash value and the signer's information, it does not incur the costs and risks of storing data, and the server can be operated with a very low load.

In addition, the hash value of the document and the signature state are recorded on the blockchain (30), which has the same effect as a so-called electronic signature. As described above, even if an email address is simply stored in the signature state, it is recorded as information that cannot be tampered with, so it is possible to preserve the fact that the transaction was genuine.

The transaction date may be stored in the blockchain (30) together with a time stamp acquired from a time stamp authority by the time authentication acquisition unit (114) of the platform server device (10). Alternatively, the service server device (20) may transmit the registration information including the signed date to the platform server device (10) and record it on the blockchain (30).

According to Japan's Electronic Bookkeeping Act, the timestamps added to electronic transaction information include those issued by certified time authentication businesses, and for example, a compatible timestamp is also required when sending invoices covered by the act via email. Service providers who electronically send invoices need to obtain timestamps individually and prepare a verifiable service, but with the present invention, the service can be provided on the platform side.

Specifically, the platform server device (10) transmits a hash value of the data via a network to a time certification server device of a time certification service accreditation organization (TSA), which creates a time stamp for the data. The time stamp data is then received from the time certification server device, and the time stamp data is recorded in the blockchain (30) together with the hash value of the data and a signature (email address).

In addition, an API for verifying the timestamp can be provided in the platform server device (10). When the inquiry reception unit (115) receives at least a hash value for the registration information from the service server device (20) through the API, a timestamp inquiry processing unit (not shown) can perform a timestamp verification process on the time authentication server device, and after receiving the result, a response can be sent to the service server device (20) from the result notification unit (117).

The registration information is recorded (S16) in the blockchain (30), and the registration result, registration success, and registration failure information are transmitted (S17) to the service server device (20), and are further notified (S18) to the user terminal (50).

Next, a processing method for signing an already stored document will be described with reference to Fig. 6. Not only the member who uploaded the document, but also the other party of the transaction can sign on the service server device (20).
Specifically, if the recipient's email address is set when uploading, the email sending/receiving unit (218) notifies the recipient of the registered details.

Based on this, the other party to the transaction also checks the document on the service server device (20) and performs the "signature" process, which causes the signature to be sent (S20). As described above, instead of an electronic signature, it is sufficient to simply send an email address. Alternatively, if the member is logged in, simply sending a signature signal can cause the service server device (20) to refer to the member information DB (22) and obtain the member's email address.

When signing, the document may be read again from the data (231) (S21) and a hash value may be calculated (S22), or these steps may be omitted.
Then, the signature (email address) is sent again as registration information to the platform server device (10) together with the hash value (233) (S23). This process allows the parties in the transaction to sequentially add and update signatures.

When the updated registration information is received through the API provided by the information receiving unit (111) of the platform server device (10), the transaction issuing unit (112) issues a transaction related to the registration information (S24). Furthermore, the smart contract processing unit (115) records the registration information in the blockchain (30) based on the transaction from the transaction issuing unit (S25).

The registration information is recorded (S25) in the blockchain (30), and the registration result, registration success, or registration failure information is transmitted (S26) to the service server device (20), and is further notified (S27) to the user terminal (50).

Next, a processing method for inquiring about management data managed on the service server device (20) will be described with reference to FIG.
In the logged-in state after logging in (S30) from the user terminal (50), the management data is referenced (S31). Specifically, the reference may be made by opening a contract list screen or by pressing an update button.

When an inquiry is received, the registration information inquiry unit (216) of the service server device (20) reads the corresponding hash value, for example by using the management number as an index (S32), and transmits it to the inquiry reception unit (115) of the platform server device (10) (S33). Again, since only the hash value is transmitted here, the platform server device (10) is not involved in the content of the data being handled at all.

The search processing unit (116) searches (S34) the blockchain (30) to see if the hash value is recorded, and if a match is found, the result notification unit (117) sends (S35) the search result together with the signature that was also recorded.

In the service server device (20), the list generation unit (217) updates the list of management data whose authenticity has been authenticated by the blockchain, and transmits it to the user terminal (50) (S36).
This result can be considered to be similar to that shown in Table 1. In other words, the management data recorded at the time of registration is searched in the blockchain (30) and displayed as authenticated information (S37).

In the present invention, while the data (231) is stored and searchably managed in the service server device (20) as in the above embodiment, it is preferable that the registration information transmitted to the platform server device (10) does not include the data.
However, a part or all of the data (231) may be stored in the platform server device (10). For example, the database (14) of higher-level services may be stored in a storage means.

The service server device (20) may perform billing processing as payment for the services provided to members. Billing processing methods are well known and will not be described here, but for example, membership may be based on a monthly flat rate, or billing may be based on the number of documents uploaded or the number of transactions completed. For billing processing, the CPU (20) may be provided with a billing processing unit (not shown) and the storage means (23) may be provided with a billing information DB (not shown).

The present invention further proposes that such billing processing and processing related to member login processing be integrated and managed on the platform server device (10) side.

That is, as shown in FIG. 2, the platform server device (10) is equipped with a member information common processing unit (118) and a member information DB (12), and when a user terminal (50) attempts to log in, the service server device (20) transfers the ID and password to the platform server device (10), or redirects the login screen itself to the platform server device (10), and performs login authentication processing on the platform server device (10).

When the service server device (20) receives the authentication result from the platform server device (10), the user is put into a logged-in state in the service server device (20).
By having the platform server device (10) manage the member information, it becomes possible to handle the managed data (231) and the member information separately, thereby improving the security of data management.
Furthermore, by the platform server device (10) providing advanced login processing, the service server device (20) can employ a low-cost, simple and excellent login technique.

As with the login process, by providing the platform server device (10) with a common billing information processing unit (119) and a billing information DB (13), the platform server device (10) can also perform billing processing for the user terminal (50). For example, by integrating billing processing that requires a high level of security, such as access to credit cards and electronic money, into the platform server device (10), it is possible to perform billing processing that is low-cost, simple, and excellent in providing higher-level services.

Needless to say, this billing process can also be used to bill fees from the operator of the platform server device to the operator of the service server device.

(Another Example 1)
As another example of signing a contract, a paper-based contract procedure can be recorded on the blockchain using an electronic seal.
FIG. 8 is an explanatory diagram of an example of registering affixed seal information using the information management platform system of the present invention.

The electronic seal device used in the present invention has the following configuration: That is, it is composed of an electronic seal device (60) equipped with a seal inside, a detection unit that detects the seal being stamped by the seal, and a transmission unit that transmits the stamp detection information detected by the detection unit via a wired or wireless communication path, and a stamp information generation device (61) equipped with a reception unit that receives the stamp detection information via the communication path, and a stamp information generation unit that acquires time information and position information at the time of reception by the reception unit and generates stamp information.

The seal information generating device (61) can be configured with a general smartphone or the like. The seal information generating device (61) reads the two-dimensional barcode (QR code (registered trademark)) (63) printed on the paper medium (62) on which the electronic file of the document is printed, and acquires seal detection information, whereby the service server device (20) recognizes that a seal has been applied, i.e., that the transaction has been completed, and transmits the seal maker information transmitted from the seal information generating device (61) together with the hash value of the corresponding electronic file to the platform server device (10) as a signature.

With this configuration, not only can the seal information be recorded on the blockchain, but it can also be linked to the signature on the electronic file of the document stored in the service server device (20), making it possible to process electronic contracts and contract forms using paper media in an integrated manner.

(Another Example 2)
The information management platform system (1) according to the present invention is not limited to managing documents as shown in the above embodiment. The data that the platform server device (10) receives from the service server device (20) is arbitrary, and any field of the database can be handled.

As an example, a service server device (20) may be connected to multiple IoT (Internet of Things) devices (70) (71) (72), and communication history with the IoT devices (70) (71) (72) may be recorded on the blockchain (30).
The specific contents of the communication history are arbitrary, and may be, for example, on/off information of an IoT device, detection information of a sensor of the IoT device, and operation result information of the IoT device.

Furthermore, the conclusion of a contract between IoT devices may be recorded as a communication history. For example, when an IoT device detects that inventory is running low and transmits a signal to place an additional order, and another IoT device that accepts the order notifies the acceptance, the hash value of the information regarding the contract contents and the serial numbers of the IoT devices of the parties involved are recorded in the blockchain (30).

Each IoT device (70) (71) (72) communicates with an IoT hub (73), which notifies the service server device (20) of the communication history together with the serial number of the IoT device. A hash value calculated from the communication history using a predetermined formula and the serial number as additional information related to the communication history are sent to the platform server device (10) via the API, and the smart contract processing unit (113) records them on the blockchain.

The IoT device in this embodiment can be any device, does not need to use an IoT hub (73), and is intended for IoT devices that are widely distributed over a network.

According to this configuration, the communication history related to the operation of the IoT devices (70), (71), and (72) can be stored on the blockchain without being tampered with. If recorded together with a timestamp, the operation of various IoT devices can be recorded so as to be verifiable at a later date.

As in the above embodiment, a hash value can be sent from the service server device (20), and passed through the query reception unit (115), search processing unit (116), and result notification unit (117) of the platform server device (10), and the list generation unit (217) can display the authenticity of the communication history.

(Other application examples)
Examples of data handled using the information management platform system (1) are listed below.
First, it is possible to transmit contents from the application software to a corresponding service server device and perform authentication related to the contents.
For example, content created using a music or drawing application can be received by a service server device (20) and the copyright can be authenticated by recording a hash value and a timestamp in the blockchain (30).

In addition, the web conference application can transmit the recorded/filmed content to a service server device (20), and the minutes can be authenticated by recording the hash value and timestamp in the blockchain (30).

The invention notes can be authenticated by creating a document record on application software, sending the document content to a service server device (20), and recording the hash value and timestamp in the blockchain (30).

Secondly, it can be used to connect any device to the service server device (20) and authenticate data generated by the device. For example, by sending data of a photograph taken from a digital camera to the service server device (20) and recording the hash value and timestamp in the blockchain, it is possible to provide a function that can prove the date of photographing and non-tampering.

The positioning results of GPS devices installed in automobiles, aircraft, ships, construction machinery, etc., and their identification information can also be transmitted to a service server device (20) and recorded in the blockchain.

Thirdly, services that combine this with existing online storage services are also possible. For example, storage service providers could provide a storage service for the stored information in accordance with the Electronic Bookkeeping Act.

Fourth, it can also be used by businesses providing crowdsourcing services to provide a notarization function for the terms of contracts between participating parties. For example, as an additional service for crowdsourcing, contract documents between a recruiting business and multiple individual business owners can be recorded and certified on the blockchain.

As described above, the information management platform system of the present invention can be used universally in a variety of authentication situations related to managed data, such as who created the managed data, when the data was created, whether the data has been altered since it was created, and who performed what operations on the data and when.

REFERENCE SIGNS LIST 1 Information management platform system 10 Platform server device 20 Service server device 30 Blockchain 40 Communication network 50 User terminal 60 Electronic seal device

Claims (14)

An information management platform system using a blockchain,
a plurality of service server devices for providing a desired data management service to a member for each management service and managing data transmitted from a user terminal of the member;
The system comprises a platform server device for receiving registration information including a hash value of the data from the service server device, registering and referencing the registration information in a blockchain to authenticate the authenticity, and a communication network connecting the service server device and the platform server device;
The platform server device includes:
an information receiving unit that provides an API (Application Programming Interface) to the plurality of service server devices and receives the registration information through the API;
a transaction issuing unit that issues a transaction related to the registration information upon receipt of the registration information;
a smart contract processing unit that records the registration information in a block chain based on a transaction from the transaction issuing unit; and a query receiving unit that provides an API to the plurality of service server devices and receives at least a hash value related to the registration information through the API.
A search processing unit that searches whether the transaction of the queried hash value is recorded on a blockchain;
a result notification unit that notifies the service server device of the search results ,
The service server device transmits the search result to the user terminal based on the search result notified by the result notifying unit, thereby making it possible to display that the data has been authenticated.
The information management platform system according to the present invention is characterized in that: The information management platform system according to claim 1 , wherein the registration information includes additional information related to the data in addition to the hash value. 3. The information management platform system according to claim 1, wherein the service server device and the platform server device each have a Web server function, and the API is a Web API. The service server device stores and manages the data in a searchable manner,
4. The information management platform system according to claim 1, wherein the registration information does not include the data managed by the service server device. In a configuration in which each data managed in each of the plurality of service server devices is associated with member information using the management service,
In the platform server device,
5. The information management platform system according to claim 1, further comprising a member information common processing unit for managing member information in an integrated manner, and providing a member information management function. In the platform server device,
6. The information management platform system according to claim 1, further comprising a common billing information processing unit for integrating and managing billing information for the plurality of service server devices, and providing a function for managing billing information for each member. The service server device is a management service that manages electronic files of documents as the data,
a hash value calculated from the electronic file using a predetermined formula and signature information for the document are transmitted to the information receiving unit of the platform server device via the API;
7. The information management platform system according to claim 1, further comprising: a processor for transmitting the hash value to the inquiry receiving unit of the platform server device via the API; receiving a search result from the result notifying unit; and displaying a contract status. The service server device is connected to a plurality of IoT (Internet of Things) devices, and the data is a communication history with the IoT devices,
a hash value calculated from the communication history using a predetermined formula and additional information related to the communication history are transmitted to the information receiving unit of the platform server device via the API;
8. The information management platform system according to claim 1, further comprising: a communication unit that transmits the hash value to the query receiving unit of the platform server device via the API; receives a search result from the result notifying unit; and displays the authenticity of the communication history. An information processing method in an information management platform system using a blockchain, comprising:
the information management platform system is comprised of a plurality of service server devices, a platform server device, and a communication network connecting the service server devices and the platform server devices;
Each service server device provides a desired data management service to a member for each management service, and manages data transmitted from a user terminal of the member,


transmitting registration information including a hash value of the data from the service server device;
an information receiving unit of the platform server device receiving the registration information through an API (Application Programming Interface);
a transaction issuing unit of the platform server device issuing a transaction related to the registration information;
A step in which a smart contract processing unit of the platform server device records the registration information in a blockchain based on a transaction from the transaction issuing unit;
transmitting at least a hash value relating to the registration information from the service server device;
a query receiving unit of the platform server device receiving at least a hash value related to the registration information through an API (Application Programming Interface);
A step in which a search processing unit of the platform server device searches whether a transaction of the queried hash value is recorded on a blockchain;
a step of a result notification unit of the platform server device notifying the service server device of the search result;
transmitting the search results from the service server device to the user terminal;
An information processing method comprising the steps of: The information processing method according to claim 9 , wherein the registration information includes additional information related to the data in addition to the hash value. 11. The information processing method according to claim 9 , wherein both the service server device and the platform server device have a Web server function, and the API is a Web API. The service server device stores and manages the data in a searchable manner,
12. The information processing method according to claim 9, wherein the registration information does not include the data managed by the service server device. The service server device manages electronic files of documents as the data,
a hash value calculated from the electronic file using a predetermined formula and signature information for the document are transmitted to the information receiving unit of the platform server device via the API;
10. The information processing method according to claim 9 , further comprising the steps of: transmitting the hash value to the inquiry receiving section of the platform server device through the API; receiving a search result from the result notifying section; and displaying a contract status. The service server device is connected to a plurality of IoT (Internet of Things) devices, and the data is a communication history with the IoT devices,
a hash value calculated from the communication history using a predetermined formula and additional information related to the communication history are transmitted to the information receiving unit of the platform server device via the API;
14. The information processing method according to claim 9, further comprising the steps of: transmitting the hash value to the inquiry receiving section of the platform server device through the API; receiving a search result from the result notifying section; and displaying authenticity of the communication history.

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