JP6526299B1 - INFORMATION PROCESSING METHOD, INFORMATION PROCESSING DEVICE, AND PROGRAM - Google Patents

Abstract

To provide an information processing method, an information processing apparatus, and a program capable of maintaining a virtual asset owned by a user. SOLUTION: The transaction information addressed to the second address, in which the information processing apparatus moves the virtual asset from the first address to the second address, addressed to the second address electronically signed by the encryption key corresponding to the first address. Storing one or more pieces of transaction information, and transmitting to the network the transaction information addressed to the second address selected from among the stored transaction information addressed to the second address when a predetermined condition is satisfied; Information processing method to execute. [Selected figure] Figure 4

Description

  The present disclosure relates to an information processing method, an information processing apparatus, and a program.

  2. Description of the Related Art Conventionally, services that allow users to trade in virtual assets via a network using terminals such as computers having communication functions, smartphones, tablets, and mobile phones are widely used. Such transactions of virtual assets are managed by a distributed ledger that records transaction information of virtual assets called block chains existing on the network, instead of management by a specific organization. This transaction information includes information on transfer of the virtual asset from the move source to the move destination, and an encryption key such as a secret key owned by the user who owns the transfer source virtual asset (proves ownership of the virtual asset The transaction information is recorded in the distributed ledger and treated as valid only after it has been digitally signed by the user) and transmitted over the network. Specifically, when transaction information digitally signed by the encryption key is transmitted on the network, the block chain node verifies its legitimacy, and groups the plurality of verified transaction information into blocks at predetermined time intervals. The transaction information is recorded in the distributed ledger by adding a new block to the end of the block chain.

  The transaction information in the blocks of the block chain can be said to be a highly trustworthy asset trading system in that it can be practically tampered with and can not be impersonated. However, if the third party knows the user's encryption key by any means, the third party creates transaction information for moving the virtual asset owned by the user to the third party, and digitally signs the network. It is possible to send on top. As long as it is digitally signed by the encryption key, the transaction information sent in this way is treated as valid transaction information. Therefore, when the encryption key is known to a malicious third party, the user can not stop the outflow of the owned virtual asset.

  Further, when the user loses the encryption key, the transaction information can not be digitally signed by the encryption key, and the virtual asset can not be moved, so the virtual asset is substantially lost.

  Patent Document 1 describes a method of managing transaction information capable of suppressing execution of a transaction based on unfair transaction information when, for example, a third party illegally obtains an encryption key in the transaction of the virtual asset. .

JP 2018-93434 A

  Generally, an encryption key such as a secret key is managed by software called a wallet. The wallet manages the encryption key owned by the user, calculates the amount of virtual assets available to the user by reading the block chain, creates transaction information, digitally signs the transaction information, and is digitally signed. It is possible to transmit the transaction information on the network.

  As described above, when a third party illegally obtains an encryption key, the virtual asset stored in the wallet associated with the encryption key is moved to another wallet managed by the user to minimize outflow of the virtual asset. It is desirable to limit it. Also, even when the user loses the encryption key, the virtual asset saved in the wallet associated with the encryption key is similarly moved to another wallet managed by the user, thereby avoiding the loss of the virtual asset. It is desirable to do.

  However, Patent Document 1 describes an information processing method that additionally verifies the validity of transaction information by challenge-response authentication using a public key, and suppresses execution of a transaction based on illegal transaction information. There is no disclosure of a technology for preserving virtual assets when a transaction based on fraudulent transaction information is executed.

  Therefore, the present disclosure has been made in view of such circumstances, and an object thereof is to provide an information processing method, an information processing apparatus, and a program that can smoothly maintain the virtual assets owned by the user.

  In an information processing method according to an embodiment of the present disclosure, transaction information addressed to a second address in which the information processing device moves a virtual asset from a first address to a second address, and an encryption key corresponding to the first address Storing one or more of the second addressee transaction information digitally signed by the user, and the second addressee transaction information selected from the stored second addressee transaction information when a predetermined condition is satisfied Sending to the network.

FIG. 1 shows a configuration of a communication system according to an aspect of the embodiment. FIG. 2 illustrates an example of a hardware configuration of an information processing apparatus according to the present disclosure. FIG. 3 shows an example of a block diagram showing a functional configuration of the information processing apparatus according to the first embodiment. FIG. 4 shows an example of the data structure of the management table of the unsent transaction information DB 331. FIG. 5 shows a part of the data structure stored in the transmitted transaction information DB 332. FIG. 6 shows an example of the data structure of the transmitted transaction information. FIG. 7 shows an example of the data structure of the rule DB 333. FIG. 8 shows an example of a sequence diagram showing processing performed by the communication system 1 in the first embodiment. FIG. 9 shows an example of a flowchart of processing in the server in the first embodiment. FIG. 10 shows an example of a sequence diagram showing an operation example of the information processing system in the first embodiment. FIG. 11 shows an example of a flowchart of processing in the server in the first embodiment. FIG. 12 shows an example of a sequence diagram showing an operation example of the information processing system in the second embodiment. FIG. 13 shows an example of a flowchart of processing in the server in the second embodiment.

<Compliance with the law>
The disclosure set forth herein, when implemented, is implemented in compliance with the laws of each country that implements the disclosure. In addition, the disclosure described in this specification is implemented with all changes, substitutions, alterations, modifications, and modifications that can be made by those skilled in the art that are required to comply with the laws and regulations of each country.

  An information processing method, an information processing apparatus, and an embodiment for implementing a program according to the present disclosure will be described with reference to the drawings.

<System configuration>
FIG. 1 shows a configuration of a communication system 1 for effectively implementing an information processing method according to an embodiment of the present disclosure. As disclosed in FIG. 1, in the communication system 1, the server 110A, the server 110B, the terminal 120A, the terminal 120B, and the terminal 120C are connected via the network 130. The server 110A, the server 110B, the terminal 120A, the terminal 120B, and the terminal 120C constitute a distributed ledger (hereinafter also referred to as "block chain"). In the present disclosure, the block chain is described as a public type configuration without a central manager, but is not limited to this and may be a private type or a consort type.

  In the present disclosure, when it is not necessary to distinguish between the server 110A and the server 110B, the server 110A and the server 110B may be expressed as the server 110, respectively.

  In the present disclosure, when it is not necessary to distinguish between the terminal 120A, the terminal 120B, and the terminal 120C, the terminal 120A, the terminal 120B, and the terminal 120C may be expressed as the terminal 120, respectively.

  In the present disclosure, when it is not necessary to distinguish between the server 110 and the terminal 120, the server 110 and the terminal 120 may be expressed as the information processing apparatus 200. The number of information processing apparatuses 200 connected to the network 130 is not limited.

  The server 110 provides a predetermined service to the terminal 120 used by the user via the network 130. The predetermined services include, by way of example and not limitation, payment services, electronic commerce services, SNS (Social Networking Services) typified by instant messengers, content providing services such as music / video / books, financial services and the like. When the user uses a predetermined service via the terminal 120, the server 110 can provide the one or more terminals 120 with the predetermined service.

  As necessary, a terminal used by the user X is expressed as a terminal 120X, and user information in a predetermined service associated with the user X or the terminal 120X is expressed as user information X. The user information is information of the user associated with the account used by the user in the predetermined service. The user information is, by way of example and not limitation, the user's name, the user's icon image, the user's age, the user's age, the user's gender, the user's address, the user's taste It includes information associated with the user, such as preferences and user identifiers, and may be any one or a combination of these.

  The network 130 is responsible for connecting two or more information processing apparatuses 200. The network 130 refers to a communication network that provides a connection path so that data can be transmitted and received after the terminal 120 connects to the server 110.

  One or more portions of network 130 may be a wired network or a wireless network. Network 130 may be, by way of example and not limitation, an ad hoc network (Ad Hoc Network), an intranet, an extranet, a Virtual Private Network (VPN), a Local Area Network (LAN), wireless Wireless LAN (WLAN), Wide Area Network (WAN), Wireless WAN (WWAN), Metropolitan Area Network (MAN), Internet Part, Public Switched Telephone Network (Public) Switched Telephone Network (PSTN), mobile phone network, ISDNs (Integrated Service Digital Networks), wireless LANs, Long Term Evolution (LTE), Code Division Multiple Access (CDMA), Bluetooth (Bluetooth), satellites Communication, etc., or It may include two or more combinations of these. Network 130 may include one or more networks 130.

  The information processing apparatus 200 may be any information processing apparatus that can implement the functions and / or methods described in the present disclosure.

  The information processing apparatus 200 may be, by way of example and not limitation, a smart phone, a mobile phone (feature phone), a computer (for example but not limited to a desktop, laptop, tablet etc.), a server device, a media computer platform (for example but not limited to) , Cables, satellite set-top boxes, digital video recorders, etc.), handheld computing devices (such as but not limited to PDAs (Personal Digital Assistants), e-mail clients), wearable terminals (such as but not limited to glasses-type devices, Including clock-type devices), other types of computers, or communication platforms.

<Hardware (HW) configuration>
The HW configuration of the information processing apparatus 200 included in the communication system 1 will be described with reference to FIG.

  The information processing apparatus 200 includes a processor 201, a memory 202, a storage 203, an input / output interface (input / output I / F) 204, and a communication interface (communication I / F) 205. The respective components of the HW of the information processing apparatus 200 are mutually connected via the bus B as an example and not limitation.

  The information processing apparatus 200 realizes the functions and / or methods described in the present disclosure by cooperation of the processor 201, the memory 202, the storage 203, the input / output I / F 204, and the communication I / F 205. Do.

  The processor 201 executes functions and / or methods implemented by code or instructions included in a program stored in the storage 203. The processor 201 may be, by way of example and not limitation, a central processing unit (CPU), a micro processing unit (MPU), a graphics processing unit (GPU), a microprocessor, a processor core, a multiprocessor. Logic circuits (hardware) or integrated circuits (ICs (Integrated Circuits) chips, LSIs (Large Scale Integration)), etc., including application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), etc. Each process disclosed in each embodiment may be realized by a dedicated circuit. In addition, these circuits may be realized by one or more integrated circuits, and the plurality of processes shown in each embodiment may be realized by one integrated circuit. Also, LSI may be called VLSI, super LSI, ultra LSI, or the like depending on the degree of integration.

  The memory 202 temporarily stores the program loaded from the storage 203 and provides the processor 201 with a work area. The memory 202 also temporarily stores various data generated while the processor 201 is executing a program. The memory 202 includes, by way of example and not limitation, random access memory (RAM), read only memory (ROM), and the like.

  The storage 203 stores a program. The storage 203 includes, by way of example and not limitation, an HDD (Hard Disk Drive), an SSD (Solid State Drive), a flash memory, and the like.

  The communication I / F 205 transmits and receives various data via the network 130. The communication may be performed by wire or wireless, and any communication protocol may be used as long as communication with each other can be performed. The communication I / F 205 has a function of executing communication with another information processing apparatus via the network 130. The communication I / F 205 transmits various data to another information processing apparatus according to an instruction from the processor 201. The communication I / F 205 also receives various data transmitted from other information processing apparatuses, and transmits the data to the processor 201.

  The input / output I / F 204 includes an input device for inputting various operations to the information processing device 200 and an output device for outputting the processing result processed by the information processing device 200. The input / output I / F 204 may be integrated with an input device and an output device, or may be separated into an input device and an output device.

  The input device is realized by any one or a combination of all types of devices capable of receiving an input from a user and transmitting information related to the input to the processor 201. The input device includes, by way of example and not limitation, hardware keys such as a touch panel, a touch display, and a keyboard, a pointing device such as a mouse, a camera (operation input via an image), and a microphone (operation input by voice).

  The output device is realized by any one or a combination of all types of devices capable of outputting the processing result processed by the processor 201. When outputting the processing result as a video and / or a moving image, the output device may display the display data according to the display data written in the frame buffer, or any one of all types of devices that can display the display data. It is realized by the combination. The output device is, by way of example and not limitation, a touch panel, touch display, monitor (for example but not limited to, liquid crystal display, OELD (Organic Electroluminescence Display), etc.), head mounted display (HDM: Head Mounted Display), projection mapping, hologram , A device capable of displaying images, text information, etc. in air (or vacuum), a speaker (audio output), a printer, etc. These output devices may be able to display display data in 3D.

  The program of each embodiment of the present disclosure may be provided stored in a computer readable storage medium. The storage medium can store the program in the “non-transitory tangible medium”. The programs include, by way of example and not limitation, software programs and computer programs.

  The storage medium is, where appropriate, one or more semiconductor-based or other integrated circuits (ICs) (for example but not limited to field programmable gate arrays (FPGAs), application specific ICs (ASICs) etc. Hard disk drive (HDD), hybrid hard drive (HHD), optical disk, optical disk drive (ODD), magneto-optical disk, magneto-optical drive, floppy diskette, floppy disk drive (FDD), magnetic disk A tape, solid state drive (SSD), RAM drive, secure digital card or drive, any other suitable storage medium, or any suitable combination of two or more of these can be included. The storage medium may be volatile, non-volatile, or a combination of volatile and non-volatile, as appropriate.

  Also, the program of the present disclosure may be provided to the information processing apparatus 200 via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program.

  The embodiments of the present disclosure can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

  Note that the program of the present disclosure is not limited and uses, for example, a script language such as JavaScript (registered trademark) or Python, a C language, a Go language, a programming language such as Go language, Swift, Kotlin, or Java (registered trademark). Implemented.

  At least a part of the processing in the information processing apparatus 200 may be realized by cloud computing configured by one or more computers.

  At least a part of the processing in the information processing apparatus 200 may be performed by another information processing apparatus. In this case, at least part of the processing of each functional unit realized by the processor 201 may be performed by another information processing apparatus.

<Others>
Unless explicitly stated, the configuration of the determination in the embodiment of the present disclosure is not essential, and the predetermined process is operated when the determination condition is satisfied, or the predetermined process is performed when the determination condition is not satisfied. You may

  In the present disclosure, unless otherwise stated or indicated by context, "or" is inclusive and not exclusive. Thus, in the present disclosure, unless otherwise stated or indicated by context, "A or B" means "A, B, or both." Further, unless stated or indicated by context, "and" means both joint and several. Thus, as used herein, unless otherwise stated or indicated by context, “A and B” means “A and B together or individually (A and B, jointly or severally)”. Further, unless otherwise stated or indicated by context, “a”, “an” or “the” shall mean “one or more”. Thus, as used herein, unless otherwise stated or indicated by context, "an A" or "the A" means "one or more A".

  The present disclosure includes all changes, substitutions, variations, alterations, and modifications that can be made by those skilled in the art with respect to the embodiments and / or examples of the present disclosure. Similarly, where appropriate, the appended claims are intended to cover all modifications, substitutions, alterations, modifications and alterations that may occur to those skilled in the art, with respect to the embodiments and / or examples of the present disclosure. Include. Furthermore, the present disclosure may include one or more features of the embodiments and / or examples in the disclosure and / or other embodiments and / or examples of the disclosure that may occur to those skilled in the art. Includes any combination with one or more features.

  In addition, an apparatus or system or a component of an apparatus or system that is adapted, arranged, capable, configured, available, operable or operable to perform a specific function Reference in the appended claims to the is intended to be arranged, capable, configured, enabled, enabled, enabled, the apparatus, system, or component thereof being so adapted. As long as the device, system or component or its specific function is activated, turned on or unlocked, it encompasses the device, system, or component as long as the device or system is operable.

  Hereinafter, an embodiment according to an example of the present disclosure will be described with reference to the drawings. However, the embodiments described below are merely examples, and are not intended to exclude application of various modifications and techniques that are not explicitly described below. That is, an example of the present disclosure can be variously modified and implemented without departing from the scope of the present disclosure. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals, and the drawings are schematic and do not necessarily match the actual dimensions, ratios, and the like. Furthermore, there may be parts where the dimensional relationships and proportions differ among the drawings.

<Term>
Before specifically describing the embodiments, terms used in the present disclosure will be described first. The “virtual asset” in the present disclosure indicates a virtual currency or a tradable asset according to the virtual currency. The “virtual currency” is, in principle, that prescribed in Article 2, Section 5, Items 1 and 2 of the Act on Fund Settlement (Law No. 59 of 2009), or any equivalent thereto. It can be distributed as electronic data without having actual items such as banknotes and coins, and can be used as compensation for goods and services among a large number of unspecified people through networks, public issuers such as central banks, etc. It means something that managers can buy and sell on specialized exchanges and sales places without necessarily being present, and that can be exchanged for tangible currencies such as yen, dollar and euro, but not limited to this.

  The virtual asset can be transferred from the user who owns the virtual asset to another user. Such virtual asset transactions are managed by a distributed ledger that records transaction information of virtual assets called block chains, instead of management by a specific organization. This transaction information includes information on transfer of the virtual asset from the move source to the move destination, and the encryption key (key certifying ownership of the virtual asset) owned by the user who owns the virtual asset as the transfer source is used. Only after being digitally signed and sent over the block chain network, transaction information is recorded in the distributed ledger and treated as valid. As an example, when transaction information digitally signed by the encryption key is transmitted on the network, the block chain node verifies the validity of the transaction information, and refers to a plurality of verified transaction information as blocks at predetermined time intervals. The transaction information is recorded in the distributed ledger as new blocks grouped and grouped are added to the end of the block chain. That is, in the block chain, data called blocks including transaction information are arranged in time series and managed, and have a role as a ledger in which the movement of the virtual asset is described.

  When transferring a virtual asset owned by a user to another user, transaction information is sent to the block chain network. The “block chain network” refers to a network that shares information related to a block chain configured by two or more information processing apparatuses 200 that communicate according to a predetermined communication protocol. The block chain network is, as an example, a P2P network. Nodes participating in this block chain network can directly share information on block chains with each other via the network 130. Here, as an example, the transaction information is described as being transmitted to the network 130 by broadcast communication, but is not limited to this and may be transmitted by unicast communication or multicast communication. The transaction information broadcasted to the block chain network is received by each information processing apparatus 200 connected to the block chain network. As an example, the broadcasted transaction information is stored in a block by an arbitrary information processing device 200 among the information processing devices 200 that have received the transaction information. When a block in which transaction information is stored is transmitted (for example, broadcasted) to the network 130, each information processing apparatus 200 connected to the block chain network receives the block, and the proof of work (PoW) and the proof of merit (PoS) are performed. Consensus formation with an algorithm such as Stake), and recording is performed after the block determined last.

  The “address” in the present disclosure is an alphanumeric identifier used when transmitting and receiving a virtual asset in a block chain, and is used to specify the migration source or destination of the virtual asset. An address, which is an identifier for specifying a migration source or migration destination of a virtual asset, is unique in the network 130 and, as an example, is in a one-to-one correspondence with an encryption key described later. The address may be associated with the secret key, and is not necessarily limited to one generated from the public key paired with the secret key.

  The “wallet” in the present disclosure does not necessarily have to be an information processing apparatus including a transaction information creation unit of a virtual asset, as long as a “key” (for example, a secret key) for signature is recorded. Alternatively, even a paper medium can be a wallet if the encryption key is recorded. The wallet can be classified according to the medium to be recorded, for example, a web (online) wallet when the server records the encryption key, a software (desktop) wallet when the terminal records the encryption key, etc. The case where the recording medium records the encryption key is called a hardware wallet, and the case where the paper medium records the encryption key is called a cold (paper) wallet. In the following, the encryption key will be described as a secret key used in the public key cryptosystem, but the invention is not limited thereto, and may be any encryption key such as a common key of the common key cryptosystem.

  However, the processing required to trade a virtual asset, for example, creation of transaction information, assignment of a digital signature, and transmission of electronically signed transaction information to a block chain network, or confirmation of a received virtual asset In order to realize this, it is necessary to have an information processing apparatus in which a transaction program such as a transaction information creation unit described later is implemented by installing a wallet program. Hereinafter, a terminal capable of trading a virtual asset by implementing a transaction information creation unit, an electronic signature unit, and a transmission unit by installing a wallet program is also referred to as a "wallet terminal".

  In addition to the private key, the wallet may further store a public key created from the private key and an identifier (address) created from the public key. In addition, a plurality of secret keys and a plurality of addresses may be recorded in one wallet.

  Further, the “first address” in the present disclosure is an identifier used when designating the first wallet as the migration source or migration destination of the virtual asset, and the “first wallet” is, for example, the user for the block chain network. It is a wallet that is mainly used for virtual asset transactions. In terms of use for virtual asset transactions, the first wallet includes wallets connected to the network 130, such as web (online) wallets and software (desktop) wallets. Among them, software (desktop) wallets are mentioned from the viewpoint of security. Here, when the function of the first wallet exists in the server 110, the first wallet corresponds to a web (online) wallet, and when the function of the first wallet exists in the terminal 120, the first wallet contains software ( It corresponds to the desktop) wallet.

  Furthermore, the “second address” in the present disclosure is an identifier used when designating the second wallet as the migration source or migration destination of the virtual asset, and the “second wallet” is, for example, the preservation of the virtual asset of the user. Is the wallet used for The second wallet may be any of a web (online) wallet, a software (desktop) wallet, a hardware wallet, and a wallet classified as a cold (paper) wallet, which is used to protect virtual assets. From the point of view, there are wallets classified into either hardware wallets or cold (paper) wallets. The hardware wallet is, for example, a type of wallet stored on the USB and can be easily taken offline, so it is difficult for a third party to know the secret key by hacking or the like. Also, a cold (paper) wallet is, for example, a type of wallet in which wallet information is written on paper, and is usually managed in a paper state, and is described only when moving a virtual asset from this cold wallet to another wallet. Since the wallet information is read and used by a terminal connected to the block chain network, it is difficult for a third party to know the secret key due to hacking or the like.

  Here, the second wallet, which is the destination to which the virtual asset is evacuated, may be a wallet owned by the same user as the user who owns the first wallet, or any other person trusted by the user who owns the first wallet. It may be a wallet owned by a third party.

  Further, the “third address” in the present disclosure is an identifier used when designating the third wallet as the migration source or migration destination of the virtual asset, and the “third wallet” is other than the first wallet and the second wallet. , And is mainly owned by a user's virtual asset counterparty or a wallet owned by a third party who has acquired a secret key. The third wallet may be any of a web (online) wallet, a software (desktop) wallet, a hardware wallet, and a wallet classified as a cold (paper) wallet.

First Embodiment
According to a first embodiment, in a trading system in which balance of a virtual asset of a wallet is changed by transmitting transaction information electronically signed to a block chain network, a virtual asset managed by a first wallet is moved to a second wallet. [2] An embodiment in which the virtual asset managed by the first wallet is maintained by storing the address-addressed transaction information in advance and transmitting the address-addressed transaction information to the block chain network when the predetermined condition is satisfied. It is. In the above-mentioned transaction system, a key pair of a secret key and a public key generated by public key cryptography is used. The private key is used to digitally sign the transaction information, and the public key is used to receive the virtual asset.

  In the first embodiment, the server 110 constructs a communication system for moving a virtual asset from a first wallet (first address) to a second wallet (second address). The server 110 is one or more pieces of transaction information before the user of the first wallet transmits it to the block chain network that has been electronically signed with the private key by oneself, the first address being the moving source and the second address being the moving destination. Transaction information (hereinafter, also referred to as “unsent transaction information”, which is an example of transaction information addressed to the second address) is previously received from the terminal 120, and stored without sending the received unsent transaction information to the block chain network Do. At the same time, the server 110 detects whether there is any threat to the virtual asset, such as the outflow of the virtual asset due to illegal transaction information or the loss of the virtual asset due to the loss of the secret key. Then, when it is required to move and maintain a virtual asset from the first wallet under a predetermined condition, unsent transaction information is selected and transmitted to the block chain network. In this way, it is possible to maintain the virtual assets owned by the user. Such a communication system may be configured as part of a trading system for conducting trading of virtual assets.

  The terminal 120 is installed with a transaction system application (hereinafter, also referred to as a "wallet program") in the storage unit 430, so that the function of managing transactions and balances of virtual assets is implemented. The trading system application is executed by the processor 201, whereby the user can access the trading system of virtual assets to trade virtual assets. For example, the terminal 120 in which the function of the first wallet is implemented creates transaction information for moving all or part of the virtual asset stored in the first wallet to the third wallet at a timing designated by the user, Digitally sign it with the wallet's private key and send it to the block chain network. This allows the user to arbitrarily trade based on his / her own virtual asset. Further, separately from this, in the first embodiment, the terminal 120 in which the function of the first wallet is implemented executes, at a predetermined timing, the value of the virtual asset according to the balance of the first wallet at that time. The transaction information to be moved to the wallet is created, is digitally signed with the first wallet secret key, and is transmitted to the server 110 as unsent transaction information.

<Effect of First Embodiment>
According to the first embodiment, when a third party who knows the secret key of the first wallet leaks part of the virtual asset from the first wallet or when the user loses the secret key of the first wallet Even in this case, the virtual assets remaining in the first wallet can be smoothly evacuated to the second wallet. As a result, it is possible to suppress the spread of damage due to the continuous outflow of the virtual asset and to prevent the loss of the virtual asset, and it is possible to realize the preservation of the virtual asset. Also, the server 110 itself manages the user's secret key, and instead of using the secret key to create and store unsent registration information, the server digitally sends unsent registration information that is digitally signed by the user's own private key. With the configuration of receiving and storing 110, it is also possible to avoid the risk of the user's private key being leaked by attacking the server 110.

<Functional Configuration of First Embodiment>
The functional configuration of the server 110 and the terminal 120 will be described with reference to FIG. FIG. 3 shows an example of a block diagram showing a functional configuration of the information processing apparatus according to the first embodiment, and shows an overall outline of the communication system 1 constructed by the information processing apparatus 200 (server 110 and terminal 120). It is also a diagram showing the configuration. The functional unit disclosed in FIG. 3 is realized by the cooperation of the processor 201, the memory 202, the storage 203, the input / output I / F 204, and the communication I / F 205 provided in the information processing apparatus 200. That is, the processor 201 of the information processing apparatus 200 illustrated in FIG. 2 develops various programs (control program, calculation program, and the like) stored in the storage 203 in the memory 202 (for example, RAM). Then, the processor 201 interprets and executes various programs developed in the memory 202 to control each hardware component, whereby the functional configuration described below is realized.

  Each function realized by the information processing apparatus 200 may be realized by a processor 201 such as a general-purpose CPU, or some or all of the functions are realized by one or more dedicated processors 201. It is also good. Furthermore, according to the embodiment and examples, the functional configuration realized by the information processing apparatus 200 may be appropriately omitted, replaced, and added.

(1) Functional Configuration of Server The server 110 includes an input / output I / F 311, a communication I / F 312, a control unit 320, and a storage unit 330. The input / output I / F 311 corresponds to the input / output I / F 204 in FIG. 2, and the communication I / F 312 corresponds to the communication I / F 205 in FIG. 2. The storage unit 330 is realized using the memory 202 and / or the storage 203. Further, the control unit 320 has a receiving unit 321, a transaction management unit 322, a detecting unit 323, a selecting unit 324, and a transmitting unit 325.

  In the storage unit 330, an unsent transaction information DB 331, a transmitted transaction information DB 332, a rule DB 333 and a program 334 are stored. The reception unit 321, the transaction management unit 322, the detection unit 323, the selection unit 324, and the transmission unit 325 are realized by the processor 201 reading and executing the program 334 stored in the storage unit 330. . In the server 110, the communication system program stored in the storage unit 330 is executed by the processor 201, whereby a communication system for maintaining the virtual asset of the first wallet is constructed.

  The unsent transaction information DB 331 is an example of a second address address transaction information storage unit that stores one or more second address address transaction information. The unsent transaction information DB 331 stores unsent transaction information and a management table. FIG. 4 is a diagram showing an example of the management table. In the management table, as an example, the migration source address and the identifier of the unsent transaction information are stored in association with each other. The management table may further store the date and time of creation of the unsent transaction information, data related to the virtual asset to be moved, and the expiration date. In addition, unsent transaction information may be recorded in the unsent transaction information DB 331, and the management table need not necessarily be provided.

  The transmitted transaction information DB 332 is transaction information of a virtual asset which is electronically signed by the encryption key corresponding to the first address and transmitted to the block chain network, wherein the first address is the movement source and the third address is the movement destination It is an example of the 3rd address address transaction information storage unit that stores one or more pieces of transaction information (hereinafter also referred to as “sent transaction information”, which is an example of the 3rd address address transaction information).

  The transmitted transaction information DB 332 stores transmitted transaction information. FIG. 5 is a view schematically showing a part of the data structure stored in the transmitted transaction information DB 332, and showing the structure of the (N + 1) th block among the blocks arranged in chronological order. In the header of the (N + 1) th block, for example, a digest of the N-th block, a timestamp, a target, and a nonce are stored. Here, the target is a value used when mining is performed using the existing PoW (Proof of Work) technology. Nonces refer to any value. To explain the mining specifically, the information processing apparatus 200 (block chain node) that performs mining repeatedly blocks while changing the value of the nonce in order to discover the nonce in which the digest of the block header is less than or equal to the target. Calculate (mining) the digest of the header. When an appropriate nonce is found, the information processing apparatus 200 that performs mining stores the found nonce and creates a block. Mining is an expensive task because the probability that a block header's digest containing arbitrary nonces becomes less than the target is extremely small. The mining is not limited to the configuration using the PoW technology. For example, each information processing apparatus 200 may be configured to add a block to the end of the block chain regardless of whether the header of the created block is less than or equal to the value of the target. In this case, the block stored in the transmitted transaction information D332 may not include the target and the nonce. Furthermore, if the block chain is a private type or a consort type, mining may not be performed.

  Next, the configuration of the body portion of the block will be described. In the example of FIG. 5, a plurality of pieces of transmitted transaction information are stored in the body of the block.

  FIG. 6 is a view showing an example of the data structure of the transmitted transaction information. In the transmitted transaction information, for example, transmission date and time, movement source address, movement destination address, data on a virtual asset to be moved, and an electronic signature are stored.

  The rule DB 333 stores conditions for transmitting unsent transaction information to the block chain network. FIG. 7 is a view showing an example of the data structure of the rule DB 333. As shown in FIG. In the example of FIG. 7, the migration source address and the rule for transmitting the unsent transaction information to the block chain network are stored in association with each other. As an example, as a rule memorized by rule DB333, the following are mentioned.

-Move destination address When a specific address is designated in the "move destination address", remittance from the move source address is limited to the designated move destination address. Therefore, it is determined that the transmitted transaction information in which an address other than the designated transfer destination address is designated as the transfer destination is invalid.

Tradeable time "Tradable time" is a condition for limiting the time when the trade information in which the corresponding address is specified as the source address is transmitted to the block chain network. When a specific time zone is designated as the tradeable time, when the transaction information is transmitted outside the designated time zone, the server 110 transmits the unsent transaction information to the block chain network.

-Upper limit of virtual assets to be moved The "upper limit of virtual assets to be moved" is a condition for limiting the amount of virtual assets that can be moved from the corresponding address. When a specific value is specified as the upper limit of the virtual asset to be moved, the server 110 blocks chained the unsent transaction information when the transaction information for moving the virtual asset of an amount exceeding the specified upper limit is sent. Send to the network The upper limit may be specified as the amount of movable virtual assets in one piece of transaction information, or may be specified as the amount of movable virtual assets in a predetermined period.

Pre-Move Notification The “pre-move notification” is a condition indicating whether or not notification is required to the server 110 when moving a virtual asset from the corresponding address. When the server 110 receives the transaction information whose source is the address for which the pre-migration notification is required, and the server 110 does not receive the pre-migration notification from the user of the address, the server 110 has not sent it. Send transaction information to the blockchain network.

Periodical Contact “periodical contact” is a condition indicating whether the user needs to notify the server 110 at predetermined intervals. In the example of FIG. 7, a period requiring periodic communication is registered in the periodic communication. If a user who has an address for which a period has been registered for periodic communication has not received periodical notification even after the period has passed, the server 110 transmits unsent transaction information to the block chain network. In the periodic communication, only the necessity may be registered. In this case, the server 110 transmits the unsent transaction information to the block chain network when there is no contact from the user having the registered address at a predetermined predetermined interval.

Validity period The “validity period” is a condition indicating the available period of the corresponding address. When there is an address exceeding the effective period in the rule DB 333, the server 110 refers to the management table and transmits unsent transaction information corresponding to the address to the block chain network.

  Note that the rule DB 333 does not have to include all the conditions described above, and may be configured from any conditions. In addition, the rule DB 333 may include conditions other than the conditions described above.

  The unsent transaction information DB 331 has a function of storing unsent transaction information received via the input / output I / F 204 without transmitting it to the block chain network.

  The receiving unit 321 has a function of receiving unsent transaction information from the wallet terminal 120 functioning as the first wallet via the input / output I / F 204, and a process of receiving transmitted transaction information from the block chain network. It has a function to perform, and a function to pass received unsent transaction information and transmitted transaction information to unsent transaction information DB 331 and transmitted transaction information DB 332.

  When the user corresponding to the first address transmits transaction information electronically signed by a secret key to the block chain network, the transaction management unit 322 receives a notification from the user via the input / output I / F 204 from the user regarding the transaction information. It has a function to perform processing.

  The detection unit 323 has a function of determining whether or not transmission of the unsent transaction information is necessary based on the conditions stored in the rule DB 333 and of passing the information to the selection unit 324.

  The unsent transaction information to be transmitted to the block chain network from the unsent transaction information stored in the unsent transaction information database 331 when the selecting unit 324 determines that the detection unit 323 needs to transmit the unsent transaction information. Choose For example, the selection unit 324 can select unsent transaction information equal to or less than the balance of the virtual asset of the first wallet. In this case, the selecting unit 324 first refers to the transmitted transaction information DB 332 and extracts transaction information whose destination is the first address from the stored transmitted transaction information, and the extracted transaction Calculate the balance of the first wallet virtual asset based on the information. The selection unit 324 can select unsent transaction information for moving a virtual asset equal to or less than the calculated balance of the virtual asset of the first wallet with reference to the unsent transaction information DB 331.

  The transmitting unit 325 has a function of transmitting the unsent transaction information selected by the selecting unit 324 to the block chain network via the input / output I / F 204.

  The storage unit 330 stores a transmitted transaction information DB 332, an unsent transaction information DB 331, a rule DB 333 and a program 334 executed by the server 110 according to the first embodiment. Also, any information received from the wallet terminal 120 or the block chain network can be temporarily stored.

(2) Functional Configuration of Terminal The wallet terminal 120 includes an input / output I / F 411, a communication I / F 412, a control unit 420, and a storage unit 430. The input / output I / F 411 corresponds to the input / output I / F 204 in FIG. 2, and the communication I / F 12 corresponds to the communication I / F 205 in FIG. 2. The control unit 420 further includes a transaction information creation unit 421, an electronic signature unit 422, and a transmission unit 423. The transaction information creation unit 421, the electronic signature unit 422, and the transmission unit 423 are realized by the processor 201 reading out and executing a program stored in the storage unit 430. The storage unit 430 is realized using the memory 202 and / or the storage 203.

  In the wallet terminal 120, the first wallet application (program) stored in the storage unit 430 is executed by the processor 201, whereby the user is a block chain network or a virtual as a virtual asset exchange connected to the block chain network. The asset trading system can be accessed to trade virtual assets.

  The transaction information creation unit 421 has a function of creating processing information for moving a virtual asset from the first wallet. The transaction information creation unit 421 designates the first address as the migration source address, designates an arbitrary address to which the virtual asset is to be moved to the movement destination address, and designates the amount of the virtual asset to be further moved to create transaction information. Do.

  Before describing the process of creating transaction information more specifically, an example of how to hold virtual asset data on a block chain network and an example of transaction process will be described. The virtual asset is recorded on the block chain as a transaction output (UTXO) set so that only the user can use it, and the wallet terminal 120 (or server 110) belongs to the user from the block chain. Calculate the virtual assets owned by the user by aggregating transaction output. The total amount of virtual assets aggregated in this manner is called "balance". For example, when a user intends to pay with a virtual asset, the wallet terminal 120 selects a transaction output that results in a desired payment amount from among transaction outputs belonging to the user present in the block chain, and Create transaction information including the identifier of the transfer destination (payee) of the virtual asset together with the information. Then, the wallet terminal 120 electronically signs the transaction information created using the secret key and transmits it to the block chain network. The electronically signed transaction information is transmitted to the block chain network, whereby the virtual asset moves from the user to the payee. More strictly, the transaction information transmitted to the block chain network is stored in a new block, and the block is stored in the block chain, thereby moving the virtual asset from the user to the payee onto the block chain. A new transaction output is generated that is recorded and configured to be available only to the payee. The balance may be managed for each user and for each type of virtual asset.

  Therefore, the function of processing the transaction information of the transaction information creation unit 421 includes the function of extracting the transaction output available to the user from the block chain and the movement amount of the virtual asset from the extracted transaction output. And a function of selecting the transaction output described in the transaction information so as to be a desired amount, and a function of combining the selected transaction output and the identifier of the transfer destination into one piece of transaction information. In addition to the process of extracting the transaction output available to the user from the block chain, the balance of the virtual asset obtained by aggregating the transaction output may be calculated.

  Furthermore, the transaction information creation unit 421 can create transaction information stored as unsent transaction information in the server 110. The details of the process in which the transaction information creation unit 421 generates the unsent transaction information will be described later with reference to FIGS. 8 and 9.

  The electronic signature unit 422 has a function of performing an electronic signature process on the transaction information generated by the transaction information generation unit 421 using a secret key. The electronically signed transaction information is stored in the block chain as transaction information for which the user having the private key has approved the movement of the virtual asset.

  The transmitting unit 423 transmits, to the server 110, transaction information (that is, unsent transaction information) whose second destination (the second wallet) is the transfer destination of the virtual asset among the transaction information generated as described above. Function and processing of transmitting transaction information whose destination is the third address (third wallet) to the virtual asset exchange system connected to the block chain network or the block chain network to the transaction system of virtual assets as the virtual asset exchange destination Have a function to perform. As a result, the transaction information whose destination is the second address (the second wallet) is stored in the unsent transaction information DB 331 of the server 110 as unsent transaction information, and the third address (the third wallet) is the virtual asset. The transaction information to be moved to is sent to the block chain network.

  The storage unit 430 stores a program executed by the wallet terminal 120 according to the first embodiment. In addition, the storage unit 430 may store the unsent transaction information DB 431, the transmitted transaction information DB 432, and the rule DB 433. Furthermore, the storage unit 430 can also temporarily store any information received from the server 110 or the block chain network. The unsent transaction information DB 431 corresponds to the unsent transaction information DB 331 of the server 110, the transmitted transaction information DB 432 corresponds to the transmitted transaction information DB 432 of the server 110, and the rule DB 433 corresponds to the rule DB 333 of the server 110.

<Operation Process of First Embodiment>
Processing of the information processing apparatus according to the first embodiment will be described with reference to FIGS. 8 to 9. FIG. 8 shows an example of a sequence diagram showing processing performed by the communication system 1 in the first embodiment, and FIG. 9 shows an example of a flowchart of processing in the information processing apparatus in the first embodiment. Note that the processing procedure described below is merely an example, and each processing may be changed as much as possible within the scope of the technical idea of the present disclosure, and steps may be omitted, replaced, and added as appropriate. is there.

(Process of storing unsent transaction information)
First, the flow of processing for storing unsent transaction information will be described with reference to FIGS. 8 and 9. In steps S802 and S902, the unsent transaction information DB 331 of the server 110 is transaction information prior to transmission to the block chain network electronically signed by the secret key of the user who owns the first wallet, and moves the first address One or more pieces of unsent transaction information whose source is the second address and which is the destination are acquired and stored. As this specific method, the transaction information creation unit 421 and the electronic signature unit 422 of the wallet terminal 120 functioning as the first wallet create the unsent transaction information, and the unsent transaction information created by the transmitting unit 423 is sent to the server 110 It is conceivable that the transmission is performed (steps S801 and S901), and the server 110 receives this and stores it in the unsent transaction information DB 331.

  Here, “not sent” of the unsent transaction information means that the block chain network is changed in the transaction system in which the balance of the virtual asset of the wallet is changed by transmitting the transaction information electronically signed to the block chain network. It means that transaction information has not been sent. Therefore, for example, even if transaction information is simply transmitted from the wallet terminal 120 to the server 110 via the network 130 as in step S801, as long as the transaction information is not transmitted to the block chain network and stored in the block chain, The transaction information is unsent transaction information.

  The amount of virtual assets to be moved designated by the unsent transaction information can be set based on the balance of the first wallet virtual asset when creating the unsent transaction information. Specifically, the value of 90%, 80%, 70%, etc. with respect to the balance of the first wallet virtual asset when creating unsent transaction information should be specified as the amount of virtual asset to be moved Can. It should be noted that the execution of a transaction based on fraudulent transaction information can not predict the amount of virtual assets that will flow out of the first wallet. Therefore, in order to be able to flexibly maintain virtual assets, unsent transaction information created at one time is not limited to one, for example, virtual assets of moving 20% of balance, 30% of balance and 40% of balance A plurality of unsent transaction information designated as a quantity may be created at one time.

  In addition, since the balance of the first wallet may change at any time according to the transaction status of the virtual asset, the server 110 periodically acquires unsent transaction information, and a plurality of acquired unsent transactions are transmitted to the unsent transaction information DB 331 It is possible to accumulate transaction information. As this specific method, for example, the wallet terminal 120 creates unsent transaction information every predetermined time period, for example, every day and sends it to the server 110, or every time the user logs in to the wallet terminal 120. It is conceivable to create transmission transaction information and send it to the server 110. Alternatively, the server 110 may send a notification requesting transmission of unsent transaction information to the wallet terminal 120, and the wallet terminal 120 may create unsent transaction information at the timing of receiving the transmission and transmit the unsent transaction information to the server 110. . The timing at which the server 110 sends a notification requesting transmission of unsent transaction information to the wallet terminal 120 includes the case where an instruction from the user is not received for a predetermined period or more every predetermined time period.

  By performing the process as described above, the unsent transaction information DB 331 stores one or more unsent transaction information and holds the unsent transaction information in a state where it is not transmitted to the block chain network until it is selected in the following process.

(Process to receive sent transaction information)
Next, the flow of the process of receiving the transmitted transaction information will be described with reference to FIGS. In steps S 803 and S 903, the receiving unit 321 of the server 110 is the transaction information of the virtual asset that is digitally signed by the secret key and transmitted to the block chain network, and the first address is the movement source and the third address is the movement destination The received transaction information to be received is received and sent to the transmitted transaction information DB 332. Thus, the transmitted transaction information DB 332 has transaction information stored in the block of the block chain (distributed ledger).

(Process of sending unsent transaction information)
Finally, the flow of the process of transmitting the unsent transaction information to the block chain network when the predetermined requirement is satisfied will be described with reference to FIGS. In S806 and S906, the transmitting unit 325 transmits the unsent transaction information to the block chain network. Thereby, the selected unsent transaction information is stored in the block chain as transmitted transaction information, and the virtual asset is evacuated from the first wallet to the second wallet from which the secret key has been known to a third party, and the virtual asset is Can be maintained.

  The conditions for the transmitting unit 325 to perform the process of transmitting the unsent transaction information are stored in the rule DB 333. Specifically, based on the conditions stored in the rule DB 333, when the detection unit 323 detects that the transmitted transaction information is incorrect (Example 1 described later), the user has forgotten the secret key When it can be estimated (Example 2 mentioned later) (Step S904), processing which transmits unsent transaction information is performed.

  At this time, prior to S806 and S906, in S805 and S905, the selection unit 324 of the server 110 sets the first address as unsent transaction information to be transmitted from among the unsent transaction information stored in the unsent transaction information DB 331. It is possible to select unsent transaction information for moving a virtual asset that is less than or equal to the total amount of virtual assets (that is, the balance of the virtual asset linked to the first address) specified in the transaction information to which the

  At this time, when there is a plurality of unsent transaction information extracted from the unsent transaction information DB 331, the selecting unit 324 is from the viewpoint of suppressing the outflow damage of the virtual asset from the first wallet by the unsolicited transaction information as much as possible. It is desirable to select unsent transaction information. Specifically, a plurality of unsent transaction information in which one unsent transaction information for moving the most virtual assets from the first wallet to the second wallet is selected, or the total value of the virtual assets to be moved is the largest It is conceivable to select in combination. Also, from the same point of view, the latest untransmitted transaction information received in chronological order may be selected. Unsent transaction information for moving virtual assets less than the total amount of virtual assets (that is, the balance of virtual assets linked to the first address) specified in the transaction information whose destination is the first address is selected.

<< First Example >>
Subsequently, a first example of the first embodiment will be described. In the first example of the first embodiment, the user who owns the first wallet in the transaction system in which the balance of the virtual asset of the wallet changes by transmitting the transaction information electronically signed to the block chain network, the user himself Blockchain network that moves the virtual asset managed by the first wallet to the more secure second wallet when it detects that the transaction information not digitally signed by the private key has been sent to the blockchain network Is an embodiment of performing processing of preserving a virtual asset managed by the first wallet by transmitting to the server.

  In the following description, the same functional configuration as that of the first embodiment is given the same reference numeral, and the description is omitted. The description of the same operation and effects as those of the first embodiment is also omitted. Hereinafter, differences from the first embodiment will be mainly described.

  In the first embodiment, when the detecting unit 323 of the server 110 detects illegal transaction information in the transaction information stored in the transmitted transaction information DB 332, the selecting unit 324 manages the first wallet. Check the balance of the virtual asset and select the transaction information to move the virtual asset below the balance to the second wallet from the unsent transaction information stored in advance, and select the transaction information selected by the transmitting unit 325 as a block chain network Send to

<< Effect of the first embodiment >>
According to the first embodiment, even when the third wallet obtains the secret key of the first wallet, the virtual assets remaining in the first wallet can be smoothly evacuated to the second wallet. . As a result, the outflow of virtual assets can be avoided, and the preservation of virtual assets can be realized.

<Functional Configuration of First Embodiment>
The functional configurations of the server 110 and the terminal 120 in the first embodiment can be the same as those in the first embodiment.

<Operation processing of the first embodiment>
The processing of the information processing apparatus according to the first embodiment will be described with reference to FIGS. 10 to 11. FIG. 10 shows an example of a sequence diagram showing processing performed by the communication system 1 in the first embodiment, and FIG. 11 shows an example of a flowchart of processing in the information processing apparatus in the first embodiment. Note that the processing procedure described below is merely an example, and each processing may be changed as much as possible within the scope of the technical idea of the present disclosure, and steps may be omitted, replaced, and added as appropriate. is there.

  The operation process in the first embodiment is essential except that in step S904, the detection unit 323 makes it essential to detect that the transmitted transaction information is invalid based on the condition stored in the rule DB 333. It can be made similar to the first embodiment.

(Process of detecting that the transmitted transaction information is invalid)
A flow of processing for detecting that the transmitted transaction information is incorrect will be described with reference to FIGS. 10 and 11. In steps S1003 and S1103, the reception unit 321 of the server 110 is the transaction information of the virtual asset that is digitally signed by the secret key and transmitted to the block chain network, and the first address is the movement source and the third address is the movement destination The received transaction information to be received is received and sent to the transmitted transaction information DB 332.

  Next, the detecting unit 323 extracts, from among the transaction information stored in the transmitted transaction information DB 332, transaction information in which the first address is the migration source of the virtual asset and the second address is not the migration destination, and the first address is Specify the transmitted transaction information whose destination is the third address.

  Here, the transmitted transaction information for which the first address is the transfer source and the third address is the transfer destination is a transaction from the first wallet owned by the user when the user's private key is not known to a third party. It is considered to contain only genuine transaction information directed to the third wallet owned by the other party. On the other hand, if the third party knows the user's private key by any means, the third party transmits the transaction information digitally signed by the private key to the block chain network without obtaining the user's permission. Thus, the virtual asset can be drained from the first wallet owned by the user to the third wallet owned by a third party not intended by the user. Therefore, when the user's secret key is known to a third party, in addition to the above-mentioned genuine transaction information, the already-sent transaction information having the first address as the transfer source and the third address as the transfer destination The fraudulent transaction information directed from the first wallet owned by the user to the third wallet owned by a third party not intended by the user may be included.

  The detecting unit 323 of the server 110 detects that the transmitted transaction information is incorrect when the transmitted transaction information received by the receiving unit 321 does not conform to a predetermined requirement (S1004 and S1104). As this specific method, the creation rule of the transaction information created by the transaction information creation unit 421 of the wallet terminal 120 functioning as the first wallet is determined in advance and shared with the server 110, and the transmitted transaction information DB 332 is stored. Among the transmitted transaction information, it is conceivable to detect transmitted transaction information that does not comply with the creation rule as an unauthorized one. In addition, in the terminal 120, the rule DB 433 stores this creation rule, and in the server 110, the rule DB 333 stores it.

  As the creation rule of the transaction information, it is conceivable to decide in advance the movement amount of the virtual asset from the first wallet or to decide in advance the destination of the virtual asset from the first wallet. As a specific method of fraud detection using such a requirement, when the amount of the virtual asset moved by one piece of transmitted transaction information exceeds a predetermined value, the transmitted transaction information is illegal It is conceivable to detect that the transmitted transaction information is illegal when the total amount of virtual assets moving by the transmitted transaction information received in a predetermined period exceeds a predetermined value. Alternatively, when the destination (the third wallet) of the virtual asset included in the transmitted transaction information is different from the predetermined destination, it is conceivable to detect that the transmitted transaction information is incorrect.

  Also, as another method for detecting that the transmitted transaction information is illegal, the transmitting unit 423 of the wallet terminal 120 functioning as the first wallet transmits the transaction information electronically signed by the secret key to the block chain network. At the same time or before or after this, it is conceivable to send a notification regarding the transaction information sent to the block chain network to the transaction management unit 322 of the server 110 as well. In the case of genuine transaction information electronically signed and transmitted by the user itself, the server 110 receives 2 of the notification received by the transaction management unit 322 from the wallet terminal 120 and the transmitted transaction information received by the receiving unit 321 from the block chain network. Receive one. On the other hand, in the case of unfair transaction information transmitted by a third party by electronic signature, the server 110 receives only the transmitted transaction information received by the receiving unit 321 from the block chain network. Therefore, in this method, when the transmitted transaction information DB 332 includes transaction information not received from the transmitting unit 423 by the transaction management unit 322, the detecting unit 323 determines that the transmitted transaction information is invalid. Can be detected.

<< 2nd Example >>
Subsequently, a second example of the first embodiment will be described. In the second example of the first embodiment, the user loses the secret key for some reason in the transaction system in which the balance of the virtual asset of the wallet changes by transmitting transaction information digitally signed to the block chain network, The first wallet manages by transmitting transaction information to move the virtual asset managed by the first wallet to the second wallet to the block chain network when the virtual asset is substantially lost. It is an embodiment of preserving virtual assets.

  In the following description, the same functional configuration as that of the first embodiment is given the same reference numeral, and the description is omitted. The description of the same operation and effects as those of the first embodiment is also omitted. Hereinafter, differences from the first embodiment will be mainly described.

  In the second embodiment, the selection unit 324 of the server 110 does not receive the instruction from the user for a predetermined period or more, or receives the instruction from the user, the balance of the virtual asset managed by the first wallet From the unsent transaction information stored beforehand, the transaction information to be transferred to the second wallet is selected from the stored unsent transaction information, and this is transmitted to the block chain network.

<Effect of Second Embodiment>
According to the second embodiment, even when the user loses the secret key of the first wallet, the virtual assets remaining in the first wallet can be smoothly evacuated to the second wallet. This makes it possible to avoid the loss of the virtual asset and realize the preservation of the virtual asset.

  Further, according to the second embodiment, in addition to the case where the private key is lost, the user is suspected of having a possibility that the third key has acquired the private key of the first wallet. Therefore, even in a state before being subjected to the outflow damage of the virtual asset based on the illegal transaction information, the virtual asset remaining in the first wallet can be smoothly evacuated to the second wallet. This can prevent the outflow of virtual assets.

<Functional Configuration of Second Embodiment>
The functional configurations of the server 110 and the terminal 120 in the second embodiment can be the same as those in the first embodiment except that a functional unit related to detection of unauthorized transaction information is not required.

  That is, in the functional configuration of the server 110, the transaction management unit 322 and the detection unit 323 are not necessarily required, and if the reception unit 321 has a function of calculating the balance of the virtual asset of the first wallet, It is not necessary to have the function of performing processing for receiving transmitted transaction information from the transaction system. In addition, the selection unit 324 grasps the balance of the virtual asset of the first wallet based on the transmitted transaction information received when the instruction from the user is not received for a predetermined period or more or when the instruction from the terminal 120 is received. It is sufficient to have a function of performing processing of selecting unsent transaction information for moving a virtual asset having a balance equal to or less than the balance of the virtual asset of the first wallet from among the processing to be performed and the stored unsent transaction information.

<Operation processing of the second embodiment>
Processing of the information processing apparatus according to the second embodiment will be described with reference to FIGS. 12 to 13. FIG. 12 shows an example of a sequence diagram showing processing performed by the communication system 1 in the second embodiment, and FIG. 13 shows an example of a flowchart of processing in the information processing apparatus in the second embodiment. Note that the processing procedure described below is merely an example, and each processing may be changed as much as possible within the scope of the technical idea of the present disclosure, and steps may be omitted, replaced, and added as appropriate. is there.

  The operation process in the second embodiment can be the same as that of the first embodiment except that the process of detecting that the user has lost the secret key is essential in step S904.

  That is, after the process of storing the unsent transaction information, a process of detecting that the user has lost the secret key is performed, and if it can be estimated that the user has lost the secret key, the unsent transaction information is transmitted. Processing can be performed. Here, in the process of transmitting the unsent transaction information, when the instruction from the user is not received for a predetermined period or more, or when the instruction from the user is received, it is presumed that the user has lost the secret key, The transmission transaction information is transmitted to the block chain network (steps S1204, S805, S806, S1304, S905, S906).

<< Third Embodiment >>
Subsequently, a third example of the first embodiment will be described. In the third example of the first embodiment, instead of or in addition to the terminal 120, the server 110 manages the first wallet in which the user's secret key is recorded, and performs processing for creating unsent transaction information. It is an example. In the following description, the same functional configuration as that of the first embodiment is given the same reference numeral, and the description is omitted. The description of the same operation and effects as those of the first embodiment is also omitted. Hereinafter, differences from the first embodiment will be mainly described.

<< Effect of the third embodiment >>
According to the third example of the first embodiment, instead of the terminal 120 creating the unsent transaction information and transmitting it to the server 110, the server 110 can create and store the unsent transaction information. Therefore, even when the user does not access the terminal 120 for a long time, the unsent transaction information can be accumulated in the unsent transaction information DB 331 of the server 110. As a result, when a third party who knows the secret key of the first wallet drains part of the virtual asset from the first wallet, the virtual asset remaining in the first wallet is smoothly evacuated to the second wallet. be able to.

<< Functional Configuration of Third Embodiment >>
(1) Functional Configuration of Server In the third embodiment, the control unit 313 of the server 110 manages a first wallet in which a user's secret key is recorded, a transaction management unit, a transaction information generation unit, and an electronic signature unit. And further.

  The wallet management unit has a function of managing that the secret key of the user recorded in the first wallet is not known to a third party. Further, the transaction information creation unit and the electronic signature unit included in the control unit 313 have the same functions as the transaction information creation unit 421 and the electronic signature unit 422. As a result, the server 110 can perform processing for creating and storing untransmitted transaction information regardless of the terminal 120.

(2) Functional Configuration of Terminal The terminal 120 has the same functional units as those of the first embodiment, and functions as a wallet terminal. That is, in the third embodiment, the secret key is managed by both the terminal 120 and the server 110. As a result, the terminal 120 creates transaction information and performs electronic signature on the transaction information without using the server 110, and transmits to the server 110 transaction information in which the second wallet is the transfer destination of the virtual asset. 3) It is possible to perform processing of transmitting transaction information in which the virtual asset is to be moved to the virtual asset trading system as a virtual asset exchange connected to the block chain network or the block chain network.

<< Operation processing of the third embodiment >>
In the process of storing the unsent transaction information, in the first embodiment, the wallet terminal 120 creates the unsent transaction information, and the server 110 receives the information and stores it in the unsent transaction information DB 331. In the example, the server 110 can also independently create and store unsent transaction information. Therefore, the process is made redundant in that the server 110 can also execute the process of storing the unsent transaction information alone. Thereby, even when the unsent transaction information is not received from the wallet terminal 120, the unsent transaction information DB 331 can record the unsent transaction information.

  The amount of virtual assets to be moved specified by the unsent transaction information in the above process can be the same as in the first embodiment. Further, as the timing for creating the unsent transaction information, it is conceivable that the server 110 creates the unsent transaction information every predetermined time period, for example, every day, and stores the unsent transaction information in the unsent transaction information DB 331.

<< 4th Example >>
Next, a fourth example of the first embodiment will be described. The fourth example of the first embodiment is an example in which the terminal 120 stores and transmits unsent transaction information in place of or in addition to the server 110. In the following description, the same functional configuration as that of the first embodiment is given the same reference numeral, and the description is omitted. The description of the same operation and effects as those of the first embodiment is also omitted. Hereinafter, differences from the first embodiment will be mainly described.

<< Effect of the fourth embodiment >>
According to the fourth example of the first embodiment, the information processing method of the first embodiment can be implemented only by the functional unit of the terminal 120 without using the functional unit of the server 110. Therefore, as a program provider, the virtual asset of the user can be maintained only by providing the program that executes the above information processing method in the terminal, and as the user, only by using the terminal 120 on which the program is installed, It is possible to achieve preservation of a virtual asset of an accident, and, similarly to the first embodiment, it is also possible to avoid the risk of the user's private key being leaked by attacking the server 110.

<< Functional Configuration of Fourth Embodiment >>
(1) Functional Configuration of Server In the fourth embodiment, the server 110 has a program providing unit that executes the above information processing method. The program may be configured as a location function of the wallet program.

(2) Functional Configuration of Terminal In addition to the functional units described in the first embodiment, the terminal 120 includes, among the functional units possessed by the server 110 in the first embodiment, a receiving unit 321, a transaction management unit 322, A functional unit corresponding to the detection unit 323, the selection unit 324, and the transmission unit 325 is included. In the fourth embodiment, these are referred to as a receiving unit 321 ′, a transaction managing unit 322 ′, a detecting unit 323 ′, a selecting unit 324 ′, and a transmitting unit 325 ′.

  The unsent transaction information DB 431 stores the unsent transaction information (transaction information addressed to the second address) created by the transaction information creation unit 421 and the electronic signature unit 422 in a state of not being transmitted to the block chain network. In addition, the transmitted transaction information DB 432 stores the transmitted transaction information (transaction information addressed to the third address) received by the receiving unit 321 ′. The rule DB 433 stores conditions and the like for transmitting unsent transaction information to the block chain network.

  The receiving unit 321 ′ has a function of receiving the transmitted transaction information from the block chain network via the input / output I / F 204 and a function of passing the received transmitted transaction information to the transmitted transaction information DB 432. Have.

  The transaction management unit 322 'has a function of storing information related to transaction information when the user corresponding to the first address transmits the transaction information electronically signed by the secret key to the block chain network.

  The detection unit 323 ′, the selection unit 324 ′, and the transmission unit 325 ′ have the same functions as the detection unit 323, the selection unit 324, and the transmission unit 325.

<< Operation processing of the fourth embodiment >>
In the process of storing the unsent transaction information, in the first embodiment, the wallet terminal 120 creates the unsent transaction information, and the server 110 receives the information and stores it in the unsent transaction information DB 331. In the example, the unsent transaction information DB 431 of the terminal 120 can store the unsent transaction information created by the terminal 120. The amount of virtual assets to be moved designated by the unsent transaction information and the timing of creating the unsent transaction information in the above process are the same as in the first embodiment.

  In the process of detecting that the transmitted transaction information is illegal, in the first embodiment, among the transmitted transaction information received by the receiving unit 321, the creation rule of the transaction information generated by the terminal 120 is shared with the server 110. In the fourth embodiment, it is not necessary to share the creation rule of the transaction information with the server 110, although the transmitted transaction information deviating from the creation rule is detected as an unauthorized one. Therefore, the creation rule of the transaction information that the moving amount of the virtual asset from the first wallet is determined in advance and the moving destination of the virtual asset from the first wallet is determined in advance is the rule DB 433 of the terminal 120 Will remember.

  Moreover, the transaction management part 322 'of the terminal 120 memorize | stores the information regarding the transaction information, when it transmits to the block chain network from the transmission part 423. FIG. Therefore, if the transmitted transaction information received by the receiving unit 321 'from the block chain network includes transaction information not included in the transaction information stored in the transaction management unit 322', the transmitted transaction information is invalid. Can be detected.

  As described above, the present invention is not limited to the above embodiment and examples, and various modifications can be made without departing from the scope of the invention. That is, the said embodiment is only a mere illustration in all the points, and is not interpreted restrictively. For example, instead of the secret key, a common key may be used, and if the block chain network is a network in which information on block chains is distributed and shared among nodes, the communication means need not necessarily follow the P2P communication protocol.

  DESCRIPTION OF SYMBOLS 1 communication system 110 server 110A server 110B server 120 terminal 120A terminal 120B terminal 120C terminal 120C network 130 200 information processor 201 processor 202 memory , 203 ... storage, 204 ... input / output interface (input / output I / F) 205 ... communication interface (communication I / F), 311, 411 ... input / output interface (input / output I / F) 312, 412 ... communication interface (Communication I / F) 320, 420 ... control unit, 321 ... reception unit, 322 ... transaction management unit, 323 ... detection unit, 324 ... selection unit, 325 ... transmission unit, 330, 430 ... storage unit, 331, 431 ... Unsent transaction information DB, 332, 432 ... Sent transaction information DB, 333, 433 ... Rule DB, 334, 4 4 ... program, 421 ... transaction information creating unit, 422 ... electronic signature unit, 423 ... transmission unit.

Claims (9)

The information processing apparatus
Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address Storing one or more address-addressed transaction information;
Transaction information addressed to a third address for transferring a virtual asset from the first address to a third address owned by a third party, the transaction addressed to the third address electronically signed by an encryption key corresponding to the first address Receiving information;
When the amount of virtual assets moved by the received third address addressed transaction information exceeds a predetermined amount, or the total amount of virtual assets moved by the third address addressed transaction information received in a predetermined period is predetermined When the amount is exceeded, the second addressee transaction information for moving virtual assets less than or equal to the total amount of virtual assets linked to the first address is selected from the stored second addressee transaction information and selected. And transmitting the second address-addressed transaction information to the network. When transaction information electronically signed by the encryption key corresponding to the first address is transmitted to the network, a step of receiving a notification regarding the transaction information from a user corresponding to the first address is further executed.
The step of transmitting to the network comprises
The information processing method according to claim 1, further comprising the step of transmitting the second address-addressed transaction information to a network when not receiving the notification corresponding to the received third address-addressed transaction information. The step of transmitting to the network comprises
The method further includes transmitting the selected second address-addressed transaction information to the network when the received third address-addressed transaction information does not include the third address in a preset destination. The information processing method as described in any one of claim | item 1 or 2. The information processing apparatus
Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address Storing one or more address-addressed transaction information;
Wherein the case does not receive an instruction from a user over a period of time that owns the first address, said stored from among the second address addressed transaction information, the total amount less the virtual asset in the virtual assets brute cord to the first address A second address-addressed transaction information to be moved, and transmitting the selected second address-addressed transaction information to the network. The step of transmitting to the network comprises
From the stored transaction information addressed to the second address, it is equal to or less than the total amount of virtual assets linked to the first address,
Transaction information to one second address to move the most virtual assets, plural second address transaction information to maximize the total value of virtual assets to be moved, or newest second address in chronological order stored The information processing method according to any one of claims 1 to 4, further comprising the step of selecting any of the address transaction information. Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address A second address-addressed transaction information storage unit that stores one or more address-addressed transaction information;
Transaction information addressed to a third address for transferring a virtual asset from the first address to a third address owned by a third party, the transaction addressed to the third address electronically signed by an encryption key corresponding to the first address A receiver for receiving information;
When the amount of virtual assets moved by the received third address addressed transaction information exceeds a predetermined amount, or the total amount of virtual assets moved by the third address addressed transaction information received in a predetermined period is predetermined When the amount is exceeded, the second addressee transaction information for moving virtual assets less than or equal to the total amount of virtual assets linked to the first address is selected from the stored second addressee transaction information and selected. An information processing apparatus comprising: a transmission unit that transmits transaction information addressed to a second address to a network. Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address A second address-addressed transaction information storage unit that stores one or more address-addressed transaction information;
Wherein the case does not receive an instruction from a user over a period of time that owns the first address, said stored from among the second address addressed transaction information, the total amount less the virtual asset in the virtual assets brute cord to the first address An information processing apparatus comprising: a transmission unit that selects transaction information addressed to a second address to which to move and transmits the transaction information addressed to the selected second address to a network. In the information processing apparatus,
Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address Storing one or more address-addressed transaction information;
Transaction information addressed to a third address for transferring a virtual asset from the first address to a third address owned by a third party, the transaction addressed to the third address electronically signed by an encryption key corresponding to the first address Receiving information;
When the amount of virtual assets moved by the received third address addressed transaction information exceeds a predetermined amount, or the total amount of virtual assets moved by the third address addressed transaction information received in a predetermined period is predetermined When the amount is exceeded, the second addressee transaction information for moving virtual assets less than or equal to the total amount of virtual assets linked to the first address is selected from the stored second addressee transaction information and selected. Transmitting the second address-addressed transaction information to the network. In the information processing apparatus,
Transaction information addressed to a second address for moving a virtual asset from a first address to a second address used for preservation of the virtual asset of the user, the second electronically signed by an encryption key corresponding to the first address Storing one or more address-addressed transaction information;
Wherein the case does not receive an instruction from a user over a period of time that owns the first address, said stored from among the second address addressed transaction information, the total amount less the virtual asset in the virtual assets brute cord to the first address A second address-addressed transaction information to be moved, and transmitting the selected second address-addressed transaction information to the network.