KR102651688B1 - Method and apparatus for sharing cancer screening data based on permissioned blockchains - Google Patents

Abstract

The present invention relates to a method and device for sharing cancer screening data based on blockchain. According to the present invention, in a method of operating a node constituting a blockchain, the node includes an input unit, an output unit, memory, a camera, a transceiver unit, and a processor, and a process of acquiring the user's cancer screening data through a cancer screener. , a process of identifying carcinoma by disease code based on the cancer screening data, a process of matching the disease code identified based on the cancer screening data to at least one of a plurality of pre-categorized disease codes, and the disease. A process of creating a transaction based on cancer screening data containing cancer screening information for each code, a process of generating a hash value based on the transaction, and transmitting the hash value to other nodes constituting the blockchain. It includes the process of

Description

Method and device for sharing cancer screening data based on permissioned blockchain {METHOD AND APPARATUS FOR SHARING CANCER SCREENING DATA BASED ON PERMISSIONED BLOCKCHAINS}

The present invention relates to a method and device for sharing cancer screening data based on permissioned blockchain. Specifically, the present invention relates to a method and device for sharing cancer screening data performed from a dedicated cancer screening kit through a permissioned blockchain network so that it can be shared between trusted nodes.

With the development of data analysis technology, led by artificial intelligence, technologies such as examination/prognosis prediction using medical data are rapidly developing, and the demand for medical data essential for technology development is also increasing. However, since medical data is sensitive personal information, special care is required when sharing data.

In this regard, the development of a data sharing method using blockchain technology with high data consistency and reliability is required.

US Patent Publication US20020111833A1

The present invention aims to solve the following problems in order to solve the above-mentioned problems.

The purpose of the present invention is to provide a method and device for allowing users to voluntarily perform cancer self-examination using a dedicated cancer screening kit and share the obtained screening data in a blockchain system.

The present invention provides a method and device that can secure high reliability and confidentiality by utilizing encrypted random numbers based on the unique information of the cancer screening kit when users share cancer screening data with the blockchain system through a permissioned blockchain system. The purpose is to provide

The present invention provides a permissioned blockchain method and device that prevents the possibility of data contamination by allowing only cancer screening device nodes that own cancer screening data to upload, and user terminals and cancer screening-related organizations to read only. The purpose.

The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

In the method of operating a node constituting a blockchain according to the present invention, the node includes an input unit, an output unit, memory, a camera, a transceiver unit, and a processor, and a process of acquiring the user's cancer screening data through a cancer screener. , a process of identifying carcinoma by disease code based on the cancer screening data, a process of matching the disease code identified based on the cancer screening data to at least one of a plurality of pre-categorized disease codes, and the disease. A process of creating a transaction based on cancer screening data containing cancer screening information for each code, a process of generating a hash value based on the transaction, and transmitting the hash value to other nodes constituting the blockchain. Constructs a blockchain that includes the process of

A process of confirming whether the cancer screening data is registered in the shared ledger of the blockchain may be further included.

The process may further include searching the shared ledger and sharing the examination data of the other nodes, comparing the examination data of the node with the examination data of the other nodes, and outputting the result of the comparison. .

A process of searching the shared ledger to share the examination data of the other nodes, and determining a recommended hospital based on at least one of medical treatment information and disease codes based on the examination data of the node and the examination data of the other nodes. It may further include a process of outputting information about the recommended hospital.

Nodes constituting the blockchain may include a cancer screening node that can write/read, a user terminal node that can read, and a cancer screening-related organization node that can read.

In the process of acquiring the user's cancer screening data through the cancer screener,

By comparing the user terminal identification code previously registered in the cancer screening system with the user terminal identification code used when obtaining cancer screening data,

If the user terminal identification code is the same, the user's cancer screening data can be obtained through a cancer screening device.

When a cancer screening data deletion request transaction occurs in the user terminal node,

The cancer screening node and the cancer screening related organization node may delete the cancer screening data according to the request transaction and propagate the deletion completion transaction to all nodes.

The cancer screening node generates a secret key using at least one of the unique information of the cancer screening device, cancer screening time, and user login time as a random number, and the cancer screening node encrypts the cancer screening data with a secret key to generate an encrypted message. , encrypting the secret key using the public key of each of the user terminal node and the cancer screening-related organization node, the cancer screening node transmits the encrypted message and the encrypted secret key to the receiving node, and the user terminal node and Each cancer screening-related organization node decrypts the message with a private key to obtain a secret key, and the user terminal node and the cancer screening-related organization node decrypt the encrypted message using the obtained secret key to receive the cancer screening data.

The process of acquiring the user's cancer screening data through the cancer screener is that the cancer screener acquires optical screening values for at least one cancer among lung cancer, liver cancer, colon cancer, stomach cancer, and breast cancer through the user's blood to obtain cancer screening data. can be configured.

The cancer screening data includes first data including user identification information, second data including R, G, and B data, third data including screening result data, and fourth data including screening metadata. , the cancer screener node generates a first secret key by using at least one of the unique information of the cancer screener, cancer screening time, and user login time as a random number, and the user terminal node generates a second secret key by using the unique data as a random number. A key is generated, and the cancer detector node converts the second data into the first method to generate fifth data, and the cancer detector node converts the first data and the third data into the second method based on the fifth data. and generate sixth data, and the cancer detector node generates seventh data including a first method and a second method, the sixth data is encrypted with the first secret key, and the seventh data is An encrypted message is generated by encrypting with the second secret key, the first secret key and the second secret key are encrypted using the public keys of each of the user terminal node and the cancer screening-related organization node, and the cancer screening node is The encrypted message and the encrypted secret key are transmitted to the receiving node, and each of the user terminal node and the cancer screening-related organization node decrypts it with a private key to obtain a first secret key and a second secret key, and the user terminal node and the cancer screening related organization node each obtain a first secret key and a second secret key. The related organization node can decrypt the 7th data with the obtained second secret key, decrypt the 6th data with the first secret key, and receive the first and third data with the 6th data.

In the node device constituting the blockchain according to the present invention, an input unit;

output unit; Memory where applications are stored; camera; Transmitter and receiver; and a processor,

The processor acquires the user's cancer screening data through a cancer screening device, identifies cancer types by disease code based on the cancer screening data, and applies the disease codes identified based on the cancer screening data to a plurality of pre-categorized Matches at least one of the disease codes, creates a transaction based on cancer screening data including information on cancer screening for each disease code, generates a hash value based on the transaction, and generates a hash value based on the transaction, and other components constituting the blockchain. The hash value can be transmitted to nodes.

A computer program recorded on a computer-readable storage medium according to the present invention is configured to perform the above-described method.

The present invention can provide a method and device in which a user voluntarily performs a cancer self-examination using a dedicated cancer screening kit and shares the obtained examination data in a blockchain system.

The present invention provides a method and device that can secure high reliability and confidentiality by utilizing encrypted random numbers based on the unique information of the cancer screening kit when users share cancer screening data with the blockchain system through a permissioned blockchain system. can be provided.

The present invention can provide a permissioned blockchain method and device that prevents the possibility of data contamination by allowing only cancer screening device nodes that own cancer screening data to upload, and user terminals and cancer screening-related organizations to only read. there is.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below.

Figure 1 illustrates the process of generating cancer screening data to be shared by nodes constituting the blockchain in the blockchain-based cancer screening data sharing system according to an embodiment of the present invention.
Figure 2 shows the operation process of a node in a blockchain-based cancer screening data sharing system according to an embodiment of the present invention.
Figure 3 shows a method of encrypting and decrypting cancer screening data in a cancer screening data sharing system according to an embodiment of the present invention.
Figure 4 is a block diagram showing the configuration of a blockchain-based cancer screening data sharing device according to an embodiment of the present invention.
Figure 5 shows the configuration of a blockchain-based cancer screening data sharing system according to an embodiment of the present invention.
Figure 6 shows a method of encrypting and decrypting cancer screening data in a cancer screening data sharing system according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the attached drawings. The advantages and features of the present disclosure and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the technical idea of the present disclosure is not limited to the following embodiments and may be implemented in various different forms. The following examples are merely intended to complete the technical idea of the present disclosure and to be used in the technical field to which the present disclosure belongs. It is provided to fully inform those skilled in the art of the scope of the present disclosure, and the technical idea of the present disclosure is only defined by the scope of the claims.

When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present disclosure, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present disclosure, the detailed description will be omitted.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which this disclosure pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined. The terminology used herein is for the purpose of describing embodiments and is not intended to limit the disclosure. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context.

Additionally, in describing the components of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there is another component between each component. It will be understood that elements may be “connected,” “combined,” or “connected.”

As used in this disclosure, “comprises” and/or “comprising” refers to a referenced component, step, operation and/or element that includes one or more other components, steps, operations and/or elements. Does not exclude presence or addition.

Components included in one embodiment and components including common functions may be described using the same name in other embodiments. Unless stated to the contrary, the description given in one embodiment can be applied to other embodiments, and detailed description will be omitted to the extent of overlap or to the extent that it can be clearly understood by a person skilled in the art. You can.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the present invention and the accompanying drawings.

Figure 1 illustrates the process of generating cancer screening data to be shared by nodes constituting the blockchain in the blockchain-based cancer screening data sharing system according to an embodiment of the present invention.

Specifically, Figure 1 shows the process of generating cancer screening data to be shared by the cancer screening device 10, which constitutes a blockchain that shares cancer screening data.

In the following description, the cancer screener 10 and the node may be used overlappingly according to the description mode, but the cancer screener 10 and the node may be explained as being identical to each other.

The node of the cancer screener 10 refers to a specific node corresponding to the cancer screener among the plurality of nodes 10 constituting the blockchain.

The node of the cancer screening device 10 may be implemented as a terminal device capable of cancer screening. Specifically, the node of the cancer screening device 10 may include an input/output unit, a transceiver unit that performs data communication, a memory storing application software, a processor, and a screening unit that performs a cancer screening by sensing the user's blood.

The node of the cancer detector 10 may be implemented as a processor that operates according to software stored in memory or as a processor with embedded software. The cancer screening device 10 may be controlled through the user terminal 20 through the transmitting and receiving unit, but is not limited to this.

The node of the cancer screening device 10 specifies the user's identity (S101). According to one embodiment, the user's identity information may be specified by inputting at least one of name, gender, age, and physical information. According to one embodiment, the node of the cancer screening device 10 may control the smartphone function of the user terminal 20 to specify the user's identity information through public certificate authentication, fingerprint or iris biometrics, etc.

The node of the cancer screener 10 detects at least one cancer among lung cancer, liver cancer, colon cancer, stomach cancer, and breast cancer using a droplet of the user's blood (S102) without a PCR process. Cancer screening data can be obtained (S103). The cancer screening device 10 may obtain optical screening values of blood to configure cancer screening data (S103). For example, the cancer screening data may include R, G, and B data. The cancer checker 10 may be a cancer checker platform using paper chip platform technology, and the cancer screening rate may have a precision of 90 to 95%. The cancer screening device 10 can be used to screen not only for cancer but also for various diseases and viruses through the strip sensor method.

The cancer screening device 10, for example, consists of a reader and a diagnostic chip, and the screening can be performed by placing blood on the diagnostic chip and inserting it into the cartridge of the reader.

The node of the cancer screening device 10 generates a secret key using at least one of the unique information of the cancer screening device 10, the cancer screening time, and the user login time as a random number, and encrypts the cancer screening data with the secret key to generate an encrypted message. Do it (S104).

The node of the cancer screener 10 matches at least one of a plurality of disease codes that are pre-categorized for each identified carcinoma (eg, lung cancer, liver cancer, colon cancer, stomach cancer, and breast cancer). According to one embodiment, the checkup items identified through the checkup at the node of the cancer screener 10 are compared with a plurality of pre-categorized diseases, matched to an appropriate disease, displayed on the screen, and then the user approves or Alternatively, you can match disease codes for each item by making some modifications and approving them.

The node of the cancer screener 10 generates a transaction for registering the examination data, generates a hash value through a preset hash algorithm corresponding to the transaction, and transmits it to each of the plurality of nodes 50 constituting the blockchain. , examination data can be registered on the blockchain.

The control unit of each of the plurality of different nodes 50 connects to the full node 50 storing the examination information and searches the shared ledger stored in the storage of the full node 50 or its own storage (or DB) You can check the examination information by searching the shared ledger stored in , and through this, the examination information can be shared between a plurality of different nodes (50).

Each of the plurality of nodes 50 can share its own checkup information. Based on the result of comparing the checkup information shared from the plurality of nodes 50 (S105), the node 50 may recommend and provide information on the cancer checkup-related organization 30 (S106) as follows. Information on the cancer screening-related organization 30 may be output through the display of the node of the user terminal 20.

According to one embodiment, a node of a cancer screening-related organization 30 may provide cancer screening data and related treatment information within a specific region. According to one embodiment, the node of the cancer screening-related institution 30 provides information such as information on the average medical cost for the same cancer screening item, treatment status, and used treatment techniques to cancer screening-related institutions 30 in a specific region. can be provided. According to one embodiment, the node of the cancer screening-related institution 30 may provide ranking information of the cancer screening-related institution 30 in a specific region according to medical expenses on an annual, monthly, and weekly basis.

According to one embodiment, the application unit 11 may provide information on hospitals with high and low treatment satisfaction evaluation scores for a specific disease or on average in a specific region. According to one embodiment, the application unit 11 may provide information on treatment items with high treatment satisfaction evaluation scores for each hospital. According to one embodiment, the application unit 11 may display treatment satisfaction evaluation scores of hospitals existing within a map area for a specific region at the location of the hospital on the map screen.

The user terminal 20 node may be implemented as a terminal device such as a smartphone. The user terminal 20 node may include a camera, a touch screen-type input/output unit, a transceiver unit that performs data communication, a memory storing application software, and a processor. In order to implement a blockchain, an application unit may be configured in each of a plurality of different terminals, and the application unit configured in each of a plurality of terminals is stored in the terminal and contains an application ( It can be composed of a processor that is executing an application, 18).

The application unit of the node of the user terminal 20 may be implemented as a processor that operates according to software stored in the memory of a terminal such as a smartphone, or as a processor with software embedded in it. This application unit can control the configuration of the node of the user terminal 20 through a processor and execute various commands for control, such as reading/requesting deletion of cancer screening data.

A blockchain network composed of nodes 50 according to the present invention may be a permissioned blockchain network. The blockchain network composed of 50 nodes shares a ledger to check the consistency (reliability) of data, and only authorized users can join. In the case of permissioned blockchain, data access rights can be customized by considering the company's business characteristics (privacy infringement issues). Specifically, in the permissioned blockchain network, each node of the cancer screener (10), the user terminal (20), and the cancer screening-related organization (30) shares a ledger to confirm data consistency between reliable nodes and read/write data. /The authority to delete can be granted differentially. For example, in a blockchain network composed of 50 nodes, the participants who can participate in the reading, writing, and consensus processes are predetermined, and specific subjects can be added or removed as needed.

The blockchain network composed of nodes 50 allows only the nodes of the cancer screening device 10 to upload (write) to prevent the possibility of contamination of screening data, and the nodes of the user terminal and cancer screening related organizations 30 Permissions can be differentially applied to allow read-only access.

Furthermore, the blockchain network composed of nodes 50 is designed to increase the reliability of data, so that when cancer screening is performed at the cancer screening device 10, the user terminal previously registered with the cancer screening device 10 is currently in progress ( It is possible to determine in advance whether it matches the identification value in 20) and control cancer screening to be performed only if it matches.

In this way, by sharing cancer screening data through a permissioned blockchain with separated access rights, it is possible to correct data errors, adjust discrepancies, and reduce messaging time for communication.

If the user terminal (20) node wants to delete specific cancer screening data on the blockchain, a deletion request transaction is generated, and the cancer screening device (10) and cancer screening related organization (30) nodes delete the cancer screening data according to the request transaction. And the deleted transaction can be propagated to all nodes. Cancer screening data can be deleted from the memory unit in the case of the cancer screening device 10 or from the general network (off-chain network) held by the cancer screening related organization 30. The information uploaded to the blockchain is encrypted (hashed) information, and messages can be confirmed through the private/public key between each node, so there is no need to directly modify the data on the blockchain network (on-chain). In this way, it is possible to secure proof of actual compliance with the Personal Information Protection Act on the blockchain network by sharing the deletion transaction of the cancer screening machine (10) and cancer screening-related organization (30) nodes with all nodes (50).

Figure 2 shows the operation process of a node in a blockchain-based medical information sharing system according to an embodiment of the present invention.

Specifically, Figure 2 shows the process in which cancer screening data obtained from a cancer screening device is shared through blockchain.

Referring to FIG. 2, the cancer screener node (10 in FIG. 1) specifies the user's identity such as name, gender, age, and physical information (S201). Additionally, the user's cancer screening data is obtained through a cancer screening device (S202). In addition, cancer types are identified by disease code based on cancer screening data (S203). Additionally, the disease code identified based on the cancer screening data is matched to at least one of a plurality of disease codes categorized in advance (S204). A transaction is created based on cancer screening data including cancer screening data for each disease code (S205). A hash value is generated based on the transaction (S206). The hash value is transmitted to other nodes constituting the blockchain (S207).

Meanwhile, when sharing cancer screening data on the blockchain according to the present invention, a process of checking whether the cancer screening data is registered in the shared ledger of the blockchain can be additionally performed.

Meanwhile, when sharing cancer screening data on a blockchain according to the present invention, a process of searching a shared ledger to share the screening data of other nodes, a process of comparing the screening data of a node with the screening data of the other nodes, A process of outputting the comparison results may be further included. Through this comparison process, reliability can be improved by checking whether the examination data is falsified or contaminated.

Meanwhile, when sharing cancer screening data on a blockchain according to the present invention, a process of searching a shared ledger and sharing the screening data of other nodes, and providing medical treatment information based on the screening data of the node and the screening data of the other nodes , a process of determining a recommended hospital based on at least one of the disease codes, and a process of outputting information about the recommended hospital. Here, the recommended hospital may be an example of an organization related to cancer screening. By sharing cancer screening data on a reliable permissioned blockchain, cancer screening-related organizations that have access to the data can recommend appropriate hospitals among hospitals corresponding to matching medical information or disease codes.

Figure 3 shows a method of encrypting and decrypting cancer screening data in a cancer screening data sharing system according to an embodiment of the present invention.

Referring to FIG. 3, the cancer screener node uses at least one of the cancer screener's unique information, cancer screening time, and user login time as a random number (S301). Additionally, a secret key is generated using the corresponding random number (S302). Additionally, cancer screening data is generated at the cancer screening node (S303). Additionally, the cancer screening data is encrypted with a secret key (S304) to generate an encrypted message (S305). Additionally, a public key is obtained from the receiving node (for example, a cancer screening node or a cancer screening related organization node) (S306). Additionally, the private key is encrypted with the recipient's public key (S307) to create a digital envelope (S308). Afterwards, the receiving node (for example, a cancer screening node or a cancer screening related organization node) obtains a private key for decryption (S309) and decrypts the digital envelope with the private key based on the private key (S310). Using the secret key obtained through this process (S311), the encrypted message containing the cancer screening data is decrypted (S312). Finally, cancer screening data is obtained from the receiving node (S313). Through this method, signature and confidentiality can be satisfied at the same time.

Figure 4 is a block diagram showing the node configuration of a blockchain-based cancer screening data sharing system according to an embodiment of the present invention.

Referring to FIG. 4, the node includes an application 11, a memory 12, an input unit 13, an output unit 14, a processor 15, a transceiver 16, and a camera 17.

In order to implement a blockchain, an application unit 11 may be configured in each of a plurality of different terminals, and the application unit 11 configured in each of a plurality of terminals is stored in the terminal and contains an algorithm required to operate as a node of the blockchain. It may be composed of a processor 15 that is executing an application 18 including .

The processor 15 executes the overall control function of the terminal using programs and data stored in the memory 12 configured in the terminal. The processor 15 may include random access memory (RAM), read only memory (ROM), central processing unit (CPU), graphic processing unit (GPU), and a bus. RAM, ROM, CPU, GPU, etc. are connected to the bus. can be connected to each other through. The processor 15 can access the storage unit and perform booting using the O/S (operating system) stored in the memory 12, and the application unit ( 11), it can be configured to perform various operations described in the present invention. The processor 15 controls the components within the device of the node, that is, the memory 12, the input unit 13, the output unit 14, the transceiver unit 16, and the camera 17, thereby performing various implementations disclosed in the present invention. Can be configured to perform examples.

In addition to the processor 15, the node includes a memory 12 that stores various data including data related to the application 18, an input unit 13 that receives user input, an output unit 14 that displays various information, and a memory 12 that stores various data including data related to the application 18. It may be configured to include various components such as a transmission/reception unit 16 for communication, and the processor 15 can control the components constituting the terminal.

The memory 12 may be composed of a database (DB) or various storage means such as a physical hard disk, solid state drive (SSD), or web hard.

The input unit 13 and output unit 14 may be configured as input/output units 13 and 14 simultaneously in the form of a touch display in a smartphone. The input unit 13 may be comprised of a physical keyboard device, a touch display, an image input sensor constituting the camera 17, a sensor that receives a fingerprint, a sensor that recognizes the iris, etc. The output unit 14 may be configured as a monitor, touch display, etc.

The transceiver 16 may be comprised of a transmitter, a receiver, or a transceiver.

In addition, the terminals that make up each of the plurality of nodes are of any type that can be connected to an external server through a wireless communication network, such as a smart phone, mobile phone, personal digital assistant (PDA), portable multimedia player (PMP), tablet PC, etc. It may include handheld-based wireless communication devices, and may also include communication devices that can be connected to external servers through a network, such as desktop PCs, tablet PCs, laptop PCs, and IPTVs including set-top boxes. can do.

Additionally, the terminals that make up each of the plurality of nodes may be implemented as servers operated by a specific company.

Figure 5 shows the configuration of a blockchain-based cancer screening data sharing system according to an embodiment of the present invention.

Referring to FIG. 5, a terminal can operate as a node 10 of a blockchain by being connected through a network between multiple different terminals.

At this time, the blockchain described in the present invention consists of a large number of transaction information into blocks, and connects several blocks like a chain using a hash, creating a P2P network. It is an algorithm that jointly manages security information by distributing and storing information on the digital devices of nodes 10 that are participants (peers) rather than on a central management server in a distributed environment. Using blockchain, data cannot be forged or altered, allowing reliable and safe transactions and data processing even without an authoritative intermediary.

In order to implement such a blockchain, an application unit 11 may be configured in each of a plurality of different terminals, and the application unit 11 configured in each of the plurality of terminals is stored in the terminal and acts as a node 10 of the blockchain. It may be composed of a processor that has executed an application that includes the algorithms required to operate as a processor.

Terminals constituting each of the plurality of nodes 10 may store information shared on the blockchain in a secure area of memory or in a secure area of a database.

That is, in the present invention, a plurality of nodes 10 can be formed based on various types of blockchain, such as where participants participating as nodes 10 in the blockchain are composed of homogeneous devices or heterogeneous devices.

Meanwhile, the blockchain network composed of nodes 10 according to the present invention may be a permissioned blockchain network. The blockchain network composed of nodes 10 shares a ledger to check the consistency (reliability) of data, and only authorized users can join. In the case of permissioned blockchain, data access rights can be customized by considering the company's business characteristics (privacy infringement issues). Specifically, in the permissioned blockchain network, each node of the cancer screener, user terminal, and cancer screening-related organization shares a ledger to confirm data consistency between reliable nodes, and permissions to read/write/delete data are differentially granted. It can be. For example, in a blockchain network composed of nodes, the participants who can participate in the reading, writing, and consensus processes are predetermined, and specific subjects can be added or removed as needed.

Based on the above-described configuration, the present invention ensures that when cancer screening data using a cancer screener is registered on the blockchain, authentication by the cancer screening-related organization is performed, so that two-way authentication between the user and the organization is performed on the blockchain, and the authentication is performed through the blockchain. The bidirectionally authenticated examination information is included in a block, a storage unit of the blockchain, and stored and shared in each of the plurality of nodes (10). In case of unauthorized change of the examination information, the examination information stored in each of the plurality of nodes (10) can be compared. By supporting the verification of forged examination information, the security, integrity, and reliability of examination information can be guaranteed by blocking forgery and alteration at the source.

Figure 6 shows a method of encrypting and decrypting cancer screening data in a cancer screening data sharing system according to another embodiment of the present invention. Referring to FIG. 6, a method of converting cancer screening data to encrypt and decrypt with higher confidentiality using a plurality of secret keys is shown.

Cancer screening data may include first data - user identification information, second data - R, G, B data, third data - screening result data, and fourth data - screening metadata. As described above, user identity information includes at least one of name, gender, age, and physical information, R, G, and B data are data optically detected from the user's blood sample, and screening result data is a specific cancer screening result. and staging information, and the screening metadata includes related information related to the screening, such as unique information of the cancer screening device, cancer screening time, and user login time.

In the present invention, the main embodiment of generating a secret key using the fourth data, examination metadata, as a random number, and encrypting the first data, second data, and third data with the secret key is disclosed in FIG. 3, but It is not limited.

Referring to FIG. 6, in order to improve confidentiality and reliability, a plurality of data can be used as a composite random number. For example, fifth data is generated by converting second data, which is numerical data, in a predetermined manner, and based on the generated fifth data, first data and third data, which are core cancer screening data, are generated according to a predetermined method. By converting, sixth data can be generated, and seventh data including transformation method information can be generated. Afterwards, confidentiality can be improved by encrypting the 7th data and the 6th data respectively based on the 1st encryption key generated using the 4th data as a random number and the 2nd encryption key generated with a separate random number that can be obtained from the user terminal node. there is. In the case of this method, a multi-stage encryption method is adopted in that decryption of the 7th data including the conversion method data is given priority based on a separate 2nd encryption key to obtain the 1st and 3rd data, which are the core examination data. In this respect, more confidentiality can be maintained.

In addition, in order to increase the reliability of data, the blockchain network according to the present invention determines in advance whether the user terminal previously registered in the cancer screening device matches the identification value of the user terminal currently in progress when performing a cancer screening at the cancer screening machine. It is controlled to perform cancer screening only when it is determined and matches, and it is possible to construct a complex security system in that it is possible to obtain a second secret key that can decrypt the seventh data as a separate random number that can be obtained from the user terminal. .

Referring to FIG. 6, the fourth data, such as the cancer screening device's unique information and the cancer screening time, is used as a random number (S410) to generate a first secret key (S402). Additionally, cancer screening data including first to fourth data is generated (S403).

Additionally, the second data is converted into the first method to generate the fifth data (S404). The second data may correspond to complex numerical data of R, G, and B through optical analysis of blood according to an embodiment of the present invention. The fifth data may change the R, G, and B numerical values of the second data into index values. For example, if the R, G, and B values correspond to 125, 124, and 101, the index value can be 0012500, 0012400, and 0010100, or the index number can be 00800, 00700, and 00200 by adding each digit. and the conversion method is not limited. The index value may contain the same number string at the front and back so that it can be distinguished based on the number. In the above-mentioned example, the front-end number sequence 00 and the back-end number sequence 00 are described, but this is only an example and is not limited. If the R, G, and B values are the same, you can set it to produce different index values by adding or subtracting specific values among R, G, and B, and then add the front and back numeric strings.

Additionally, sixth data is generated by converting the first data and third data into the second method based on the fifth data (S405). The index values obtained in the previous step (S404) are assigned to each block in ascending or descending order so that the first data and third data can be identified in a certain order, and then the blocks are randomly shuffled. Sixth data can be generated. This sixth data becomes completely randomly mixed data, and the user identification information and cancer screening data contained therein cannot be derived unless information on the index value is obtained.

Information on the first and second methods for converting the sixth data into meaningful first and third data is generated as seventh data (S406).

The sixth data, which is the converted form of the core cancer screening data, is encrypted with the first secret key (S409), and the seventh data including the rule for converting the sixth data is encrypted with a separate second secret key (S410). For example, the second secret key can be generated by using unique data obtainable from the user terminal node as a random number (S407), but the second secret key is not limited to this (S408).

In addition, the public key of the receiving node is obtained (S411), the first secret key is encrypted with the recipient's public key (S412), the public key of the receiving node is obtained (S413), and the second secret key is used as the recipient's public key. Encrypt (S414). As a result, digital envelopes are created respectively (S415, 416)

Additionally, an encrypted message is created using the encrypted sixth and seventh data (S417).

In the decryption step, the private key of the receiving node is acquired (S418), the first secret key is decrypted with the private key of the receiving node (S419), and the first secret key is obtained (S420). Additionally, the private key of the receiving node is obtained (S421), the second secret key is decrypted with the private key of the receiving node (S422), and the second secret key is obtained (S423).

Additionally, the 7th data can be decrypted with the second secret key (S424), the 6th data can be decrypted with the first secret key (S424), and the 1st and 3rd data can be obtained with the 6th data (S424). In this way, cancer screening data is obtained from the receiving node (S425).

When implementing embodiments of the present invention using hardware, application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), and programmable logic devices (PLDs) configured to perform the present invention. , FPGAs (field programmable gate arrays), etc. may be provided in the processor of the present invention.

Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable medium. Additionally, the data structure used in the above-described method can be recorded on a computer-readable storage medium through various means. Program storage devices, which may be used to describe a storage device containing executable computer code for performing various methods of the present invention, should not be understood to include transient objects such as carrier waves or signals. do. The computer-readable storage media includes storage media such as magnetic storage media (eg, ROM, floppy disk, hard disk, etc.) and optical readable media (eg, CD-ROM, DVD, etc.).

The embodiments described above combine the components and features of the present invention in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. Additionally, it is possible to configure an embodiment of the present invention by combining some components and/or features. The order of operations described in embodiments of the invention may be changed. Some features or features of one embodiment may be included in another embodiment or may be replaced with corresponding features or features of another embodiment. It is obvious that claims that do not have an explicit reference relationship in the patent claims can be combined to form an embodiment or included as a new claim through amendment after filing.

It will be clear to those skilled in the art that the present invention can be embodied in other forms without departing from the technical spirit and essential features of the present invention. Accordingly, the above embodiments should be considered in all respects as illustrative rather than restrictive. The scope of rights of the present invention should be determined by reasonable interpretation of the appended claims and all possible changes within the equivalent scope of the present invention.

10: cancer screening device 20: user terminal
30: Cancer screening related organizations 50: Node

Claims (12)

In the method of operating a node constituting a blockchain, the node includes an input unit, an output unit, memory, a camera, a transceiver unit, and a processor,
The process of acquiring the user's cancer screening data through a cancer screening device,
A process of identifying carcinoma by disease code based on the cancer screening data,
A process of matching a disease code identified based on the cancer screening data to at least one of a plurality of pre-categorized disease codes;
A process of creating a transaction based on cancer screening data including cancer screening information for each disease code;
A process of generating a hash value based on the transaction,
Including the process of transmitting the hash value to other nodes constituting the blockchain,
The nodes that make up the blockchain include a cancer screening node that can write or read, a user terminal node that can read, and a cancer screening-related organization node that can read,
The cancer screener node generates a secret key using at least one of the cancer screener's unique information, cancer screening time, and user login time as a random number,
The cancer screening node encrypts the cancer screening data with a secret key and generates an encrypted message,
Encrypting the secret key using the public key of each of the user terminal node and the cancer screening-related organization node,
The cancer detector node transmits the encrypted message and the encrypted secret key to the receiving node,
Each of the user terminal nodes and cancer screening-related organization nodes obtains a secret key by decrypting it with a private key,
The user terminal node and the cancer screening related organization node decrypt the encrypted message with the obtained secret key and receive the cancer screening data,
The cancer screening data includes first data including user identification information, second data including R, G, and B data, third data including screening result data, and fourth data including screening metadata. ,
The cancer screener node generates a first secret key using at least one of the cancer screener's unique information, cancer screening time, and user login time as a random number,
The user terminal node generates a second secret key using unique data as a random number,
The cancer detector node converts the second data into a first method to generate fifth data,
The cancer detector node generates sixth data by converting the first data and third data in a second method based on the fifth data,
The cancer detector node generates seventh data including a first method and a second method,
The sixth data is encrypted with the first secret key, and the seventh data is encrypted with the second secret key to generate an encrypted message,
Encrypting the first secret key and the second secret key using the public keys of each of the user terminal node and the cancer screening-related organization node,
The cancer detector node transmits the encrypted message and the encrypted secret key to the receiving node,
Each of the user terminal node and the cancer screening-related organization node obtains a first secret key and a second secret key by decrypting it with a private key,
The user terminal node and the cancer screening related organization node decrypt the 7th data with the obtained second secret key, decrypt the 6th data with the first secret key, and receive the 1st and 3rd data with the 6th data. A method of operating nodes constituting a blockchain, characterized in that: According to claim 1,
A method of operating a node constituting a blockchain further comprising confirming whether the cancer screening data is registered in the shared ledger of the blockchain. According to claim 2,
A process of searching the shared ledger and sharing the examination data of the other nodes,
A process of comparing the examination data of the node with the examination data of the other nodes,
A method of operating a node constituting a blockchain further comprising the process of outputting the result of the comparison. According to claim 2,
A process of searching the shared ledger and sharing the examination data of the other nodes,
A process of determining a recommended hospital based on at least one of medical treatment information and disease codes based on the examination data of the node and the examination data of the other nodes;
A method of operating a node constituting a blockchain further comprising the process of outputting information about the recommended hospital. delete According to claim 1,
In the process of acquiring the user's cancer screening data through the cancer screener,
By comparing the user terminal identification code previously registered in the cancer screening system with the user terminal identification code used when obtaining cancer screening data,
A method of operating a node constituting a blockchain that obtains a user's cancer screening data through a cancer screening device when the user terminal identification code is the same. According to claim 1,
When a cancer screening data deletion request transaction occurs in the user terminal node,
A method of operating a node constituting a blockchain in which the cancer screening node and the cancer screening related organization node delete cancer screening data according to the request transaction and propagate the deletion completed transaction to all nodes. delete According to claim 1,
The process of obtaining the user's cancer screening data through the cancer screening device is
The cancer screener is a process of constructing cancer screening data by obtaining optical screening values for at least one of lung cancer, liver cancer, colon cancer, stomach cancer, and breast cancer through the user's blood. A method of operating a node that constitutes a blockchain. delete In the device of the nodes that make up the blockchain,
input unit;
output unit;
Memory where applications are stored;
camera;
Transmitter and receiver; and
Contains a processor,
The processor,
Obtain the user's cancer screening data through a cancer screening device,
Identify cancer types by disease code based on the cancer screening data,
Matching the disease code identified based on the cancer screening data to at least one of a plurality of pre-categorized disease codes,
Create a transaction based on cancer screening data including cancer screening information for each disease code,
Generate a hash value based on the transaction,
Configured to transmit the hash value to other nodes constituting the blockchain,
The nodes that make up the blockchain include a cancer screening node that can write or read, a user terminal node that can read, and a cancer screening-related organization node that can read,
The cancer screener node generates a secret key using at least one of the cancer screener's unique information, cancer screening time, and user login time as a random number,
The cancer screening node encrypts the cancer screening data with a secret key and generates an encrypted message,
Encrypting the secret key using the public key of each of the user terminal node and the cancer screening-related organization node,
The cancer detector node transmits the encrypted message and the encrypted secret key to the receiving node,
Each of the user terminal nodes and cancer screening-related organization nodes obtains a secret key by decrypting it with a private key,
The user terminal node and the cancer screening related organization node decrypt the encrypted message with the obtained secret key and receive the cancer screening data,
The cancer screening data includes first data including user identification information, second data including R, G, and B data, third data including screening result data, and fourth data including screening metadata. ,
The cancer screener node generates a first secret key using at least one of the cancer screener's unique information, cancer screening time, and user login time as a random number,
The user terminal node generates a second secret key using unique data as a random number,
The cancer detector node converts the second data into a first method to generate fifth data,
The cancer detector node generates sixth data by converting the first data and third data in a second method based on the fifth data,
The cancer detector node generates seventh data including a first method and a second method,
The sixth data is encrypted with the first secret key, and the seventh data is encrypted with the second secret key to generate an encrypted message,
Encrypting the first secret key and the second secret key using the public keys of each of the user terminal node and the cancer screening-related organization node,
The cancer detector node transmits the encrypted message and the encrypted secret key to the receiving node,
Each of the user terminal node and the cancer screening-related organization node obtains a first secret key and a second secret key by decrypting it with a private key,
The user terminal node and the cancer screening related organization node decrypt the 7th data with the obtained second secret key, decrypt the 6th data with the first secret key, and receive the 1st and 3rd data with the 6th data. A device characterized in that. A computer program configured to perform the method according to any one of claims 1, 4, 6, 7, and 9, and recorded on a computer-readable storage medium.