KR20220144671A - 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 diagnosis data based on a blockchain. According to the present invention, provided is a method for operating a node constituting a blockchain, wherein the node includes an input unit, an output unit, a memory, a camera, a transmission/reception unit, and a processor. The method comprises the steps of: obtaining cancer diagnosis data of a user through a cancer diagnosis device; identifying a cancer type for each disease code based on the cancer diagnosis data; matching a disease code identified based on the cancer diagnosis data with at least one of a plurality of pre-categorized disease codes; generating a transaction based on the cancer diagnosis data including cancer diagnosis information for each disease code; generating a hash value based on the transaction; and transmitting the hash value to other nodes constituting the blockchain. According to the present invention, the method and device can prevent the possible contamination of data.

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 apparatus for sharing cancer screening data based on a permissioned blockchain. Specifically, the present invention relates to a method and apparatus for sharing cancer screening data performed by a dedicated cancer screening kit through a permissioned blockchain network to be shared between reliable 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 data essential for technology development is also increasing. However, since medical data corresponds to sensitive data of an individual, special attention is required for data sharing.

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

US Patent Publication No. US20020111833A1

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

An object of the present invention is to provide a method and apparatus for a user to voluntarily perform a cancer self-examination in a dedicated cancer screening kit and share the acquired screening data to a block chain system.

The present invention provides a method and device capable of securing high reliability and confidentiality by utilizing an encrypted random number based on unique information of a cancer screening kit when a user shares cancer screening data with a blockchain system through a permission-type blockchain system. intended to provide

The present invention is to provide a permission-type blockchain method and apparatus for preventing data contamination by enabling only a cancer screening device node that owns cancer screening data to be uploaded and read only for user terminals and cancer screening-related organizations. The purpose.

The problems to be solved of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

In the method of operating a node constituting a block chain according to the present invention, the node includes an input unit, an output unit, a memory, a camera, a transceiver, and a processor, and includes a process of acquiring cancer screening data of a user through a cancer screening device; a process of identifying a cancer type for each 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; A process of generating a transaction based on cancer screening data including information on cancer screening for each code, a process of generating a hash value based on the transaction, and transmitting the hash value to other nodes constituting the block chain construct a block chain that includes the process of

The method may further include checking whether the cancer screening data is registered in the shared ledger of the block chain.

The method 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. .

The process of searching the shared ledger to share the checkup data of the other nodes, and the process of determining a recommended hospital based on at least one of treatment information and a disease code based on the checkup data of the node and the checkup data of the other nodes and outputting information on the recommended hospital.

The nodes constituting the block chain may include a write/readable cancer screening node, a readable user terminal node, and a readable cancer screening-related institution node.

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

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

When the user terminal identification code is the same, the user's cancer screening data may be acquired through the 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 institution node may delete cancer screening data according to the request transaction and propagate the deletion-completed transaction to all nodes.

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

In the process of acquiring the user's cancer screening data through the cancer screening device, the cancer screening device acquires an optical screening value for at least one of lung cancer, liver cancer, colorectal 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 identity information, second data including R, G, and B data, third data including examination result data, and fourth data including examination metadata, , the cancer screening device node generates a first secret key using at least one of unique information of the cancer screening device, a cancer screening time, and a user login time as a random number, and the user terminal node uses the unique data as a random number to generate a second secret generating a key, and the cancer screening node converts the second data into a first method to generate fifth data, and the cancer screening node converts the first data and the third data into a second method based on the fifth data. to generate sixth data, the cancer screening 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 The second secret key is encrypted to generate an encrypted message, and the first secret key and the second secret key are encrypted using the public keys of the user terminal node and the cancer screening-related institution node, and the cancer screening node is the The encrypted message and the encrypted secret key are transmitted to the receiving node, and each of the user terminal node and the cancer examination-related institution node is decrypted with the private key to obtain a first secret key and a second secret key, and the user terminal node and cancer examination The related institution node may decrypt the seventh data with the obtained second secret key, decrypt the sixth data with the first secret key, and receive the first and third data as the sixth data.

A device for nodes constituting a block chain according to the present invention, comprising: an input unit;

output unit; a memory in which the application is stored; camera; transceiver; and a processor;

The processor acquires the user's cancer screening data through a cancer screening device, identifies cancer types for each disease code based on the cancer screening data, and pre-categorizes the identified disease codes based on the cancer screening data. Matching at least one of the disease codes, generating a transaction based on cancer screening data including information on cancer screening for each disease code, generating a hash value based on the transaction, and generating other components constituting the block chain The hash value may be transmitted to the 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 apparatus for a user to voluntarily perform a cancer self-examination in a dedicated cancer screening kit and share the acquired screening data with a block chain system.

The present invention provides a method and device capable of securing high reliability and confidentiality by utilizing an encrypted random number based on unique information of a cancer screening kit when a user shares cancer screening data with a blockchain system through a permission-type blockchain system. can provide

The present invention can provide a permission-type block chain method and device that prevents data contamination by enabling only a cancer screening device node that owns cancer screening data to upload and read only for user terminals and cancer screening-related organizations. have.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

1 illustrates a process of generating cancer screening data to be shared by nodes constituting a block chain in a block chain-based cancer screening data sharing system according to an embodiment of the present invention.
2 illustrates an operation process of a node in a blockchain-based cancer screening data sharing system according to an embodiment of the present invention.
3 illustrates a method of encrypting and decrypting cancer screening data in a cancer screening data sharing system according to an embodiment of the present invention.
4 is a block diagram showing the configuration of a block-chain-based cancer screening data sharing device according to an embodiment of the present invention.
5 shows the configuration of a block-chain-based cancer screening data sharing system according to an embodiment of the present invention.
6 illustrates 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 accompanying drawings. Advantages and features of the present disclosure and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the technical spirit of the present disclosure is not limited to the following embodiments, but may be implemented in various different forms, and only the following embodiments complete the technical spirit of the present disclosure, and in the technical field to which the present disclosure belongs It is provided to fully inform those of ordinary skill in the scope of the present disclosure, and the technical spirit of the present disclosure is only defined by the scope of the claims.

In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, 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 thereof will be omitted.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which this disclosure belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular. The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present disclosure. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase.

In addition, in describing the components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It should be understood that elements may be “connected,” “coupled,” or “connected.”

As used herein, “comprises” and/or “comprising” refers to a referenced component, step, operation and/or element of one or more other components, steps, operations and/or elements. The presence or addition is not excluded.

A component included in one embodiment and a component having a common function may be described using the same name in another embodiment. Unless otherwise stated, the descriptions described in one embodiment may be applied to other embodiments, and specific descriptions will be omitted within the overlapping range or within the range that can be clearly understood by those skilled in the art. can

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

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

Specifically, FIG. 1 shows a process of generating cancer screening data to be shared by the cancer screening device 10 constituting the block chain sharing the cancer screening data.

In the following description, the cancer screening device 10 and the node may be described as identical to each other while the cancer screening device 10 and the node are used repeatedly according to the description aspect.

The node of the cancer screening device 10 refers to a specific node corresponding to the cancer screening device among a plurality of nodes 10 constituting the block chain.

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 for performing data communication, a memory in which application software is stored, a processor, and a screening unit for performing cancer screening by sensing the user's blood.

The node of the cancer screening device 10 may be implemented as a processor that operates according to software stored in a memory or a processor in which the software is embedded in an embedded form. The cancer screening device 10 may be controlled through the user terminal 20 through the transceiver, but is not limited thereto.

The node of the cancer screening device 10 specifies the identity of the user (S101). According to an embodiment, the user's identity information may be specified by receiving a selection of at least one of name, gender, age, and body information. According to an 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 biometric recognition, and the like.

The node of the cancer screening device 10 checks at least one cancer among lung cancer, liver cancer, colorectal cancer, stomach cancer, and breast cancer using a drop of the user's blood without the PCR process (S102). Cancer screening data can be obtained (S103). The cancer screening device 10 may obtain an optical screening value 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 a paper chip platform technology, and a cancer checkup rate may have a precision of 90 to 95%. The cancer screening device 10 may be used for screening of various diseases and viruses as well as cancer through the strip sensor method.

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

The node of the cancer screening device 10 generates a secret key by 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 encryption message. do (S104).

The node of the cancer screening device 10 matches at least one of a plurality of disease codes classified in advance for each identified carcinoma (eg, lung cancer, liver cancer, colorectal cancer, stomach cancer, breast cancer). According to an embodiment, the checkup item identified through the checkup in the node of the cancer screening device 10 is compared with a plurality of pre-categorized diseases, matched with a suitable disease, is displayed on the screen, and the user approves or Alternatively, you can match the disease code for each item by making some modifications and then accepting it.

The node of the cancer screening device 10 generates a transaction for registration of checkup 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 block chain. , it is possible to register the examination data in the blockchain.

The control unit of each of the plurality of different nodes 50 accesses the full node 50 storing the examination information and searches the shared ledger stored in the storage unit of the corresponding full node 50 or its own storage unit (or DB). It is possible to check the examination information by searching the shared ledger stored in the , and through this, it is possible to share the examination information between a plurality of different nodes 50 .

Each of the plurality of nodes 50 may share their respective examination 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 screening-related institution 30 as follows ( S106 ). Information of the cancer screening-related institution 30 may be output through the display of the node of the user terminal 20 .

According to an embodiment, the node of the cancer screening-related institution 30 may provide cancer screening data and related treatment information in a specific region. According to an embodiment, the node of the cancer screening-related institution 30 provides information such as the average medical cost for each cancer screening item, the medical treatment status, and the used medical treatment technique to the cancer screening-related organizations 30 in a specific region. can provide According to an 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 the annual, monthly, and weekly medical expenses.

According to an embodiment, the application unit 11 may provide information about a hospital having a high evaluation score of treatment satisfaction and a hospital having a low evaluation score on average for a specific disease in a specific region or on average. According to an embodiment, the application unit 11 may provide information on a treatment item having a high evaluation score of treatment satisfaction for each hospital. According to an embodiment, the application unit 11 may display the evaluation scores of the treatment satisfaction of hospitals existing in 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 smart phone. The user terminal 20 node may include a camera, an input/output unit in the form of a touch screen, a transceiver for performing data communication, a memory in which application software is stored, and a processor. To implement the block chain, an application unit may be configured in each of a plurality of different terminals, and the application unit configured in each of the plurality of terminals is stored in the terminal and is an application ( application, 18) may be configured as a processor in a running state.

The application unit of the node of the user terminal 20 may be implemented as a processor that operates according to software stored in a memory of a terminal such as a smart phone or a processor in which software is embedded. The application unit may control the configuration of the node of the user terminal 20 through the processor to execute various commands for controlling, such as reading/deleting cancer screening data.

The blockchain network composed of nodes 50 according to the present invention may be a permissioned blockchain network. The blockchain network composed of nodes 50 shares the ledger to check the consistency (reliability) of data, and only authorized users can join. In the case of permission-type blockchain, data access rights can be customized in consideration of the company's business characteristics (personal information infringement problem). Specifically, in the permission-type blockchain network, each node of the cancer screening device 10, the user terminal 20, and the cancer screening-related institution 30 shares a ledger to check data consistency between reliable nodes, and read/write data. /Delete permission can be granted differentially. For example, in a blockchain network composed of nodes 50, participants who can participate in read, write, and consensus processes are predetermined, and specific subjects can be newly 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) in order to prevent the possibility of contamination of the screening data, and the nodes of the user terminal and the cancer screening-related institution 30 are Permissions can be applied differentially to allow read-only access.

Furthermore, in order to increase the reliability of data, the block chain network composed of nodes 50 is a user terminal ( 20), it can be determined in advance whether or not it matches the identification value, and control can be performed to perform cancer screening only if they match.

In this way, it is possible to correct data errors, adjust discrepancy details, and reduce messaging time for communication through cancer screening data sharing through permission-type blockchain with separated access rights.

When the user terminal 20 node wants to delete specific cancer screening data on the block chain, a deletion request transaction is generated, and the cancer screening device 10 and the cancer screening-related institution 30 node delete the cancer screening data according to the requested transaction. and the deleted transaction can be propagated to all nodes. Deletion of cancer screening data may be performed in the memory unit in the case of the cancer screening device 10 and in the off-chain network in the case of the cancer screening-related institution 30 . The information uploaded on the blockchain is encrypted (hashed) information, and messages can be checked through the private/public key between each node, so there is no need to directly tamper with the data on the blockchain network (on-chain). As such, by sharing the deletion transaction of the cancer screening device 10 and the cancer screening-related institution 30 node with all nodes 50, it is possible to secure proof of whether the actual privacy protection law has been complied with on the block chain network.

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

Specifically, FIG. 2 shows a process in which cancer screening data obtained from a cancer screening device is shared through a block chain.

Referring to FIG. 2 , the cancer screening device (10 in FIG. 1 ) node identifies the user's name, gender, age, body information, etc. (S201). In addition, the user's cancer screening data is acquired through the cancer screening device (S202). In addition, based on the cancer screening data, the cancer type for each disease code is identified (S203). In addition, the disease code identified based on the cancer screening data is matched with at least one of the plurality of disease codes classified in advance ( S204 ). A transaction is generated 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 block chain (S207).

On the other hand, when the cancer screening data according to the present invention is shared on the block chain, a process of confirming whether the cancer screening data is registered in the shared ledger of the block chain may be additionally performed.

On the other hand, the process of sharing the checkup data of the other nodes by searching the shared ledger when sharing the cancer checkup data on the block chain according to the present invention, the process of comparing the checkup data of the node with the checkup data of the other nodes; The method may further include outputting a result of the comparison. Through this comparison process, reliability can be improved by checking whether the examination data is forged or contaminated.

On the other hand, when sharing on the block chain of cancer screening data according to the present invention, the process of searching the shared ledger and sharing the checkup data of the other nodes, and treatment information based on the checkup data of the node and the checkup data of the other nodes , determining a recommended hospital based on at least one of the disease codes, and outputting information on the recommended hospital. Here, the recommended hospital may be, for example, an example of a cancer screening-related institution. By sharing cancer screening data in a reliable permission-type block chain, it is possible to recommend an appropriate hospital among hospitals corresponding to matching medical information or disease codes in cancer screening-related institutions that can access the data.

3 illustrates 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 screening device node uses at least one of unique information of the cancer screening device, a cancer screening time, and a user login time as a random number ( S301 ). In addition, a secret key is generated using the corresponding random number (S302). In addition, the cancer screening device node generates cancer screening data (S303). In addition, the cancer screening data is encrypted with the secret key (S304) to generate an encrypted message (S305). In addition, a public key is obtained from the receiving node (eg, a cancer screening device node or a cancer screening-related institution node) (S306). In addition, the private key is encrypted with the public key of the recipient (S307) to generate a digital envelope (S308). Thereafter, the receiving node (eg, a cancer screening device node or a cancer screening-related institution node) acquires a private key for decryption (S309), and decrypts the digital envelope with the private key based on the private key (S310). The secret key obtained through this process (S311) and the encrypted message including the cancer screening data is decrypted (S312). Finally, the receiving node acquires cancer screening data (S313). In this way, signature and confidentiality can be satisfied at the same time.

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

Referring to FIG. 4 , a 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 .

To implement the block chain, the 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 an algorithm required to operate as a node of the block chain. It may be composed of the processor 15 in a state in which the application (application, 18) including the execution state.

The processor 15 executes the overall control function of the terminal by using the program 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. can be connected to each other through The processor 15 may access the storage unit to perform booting using an O/S (operating system) stored in the memory 12 , and use the application 18 stored in the memory 12 to access the application unit ( 11) may be configured to perform various operations described in the present invention while operating. The processor 15 controls various implementations disclosed in the present invention by controlling the components in 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 . may be configured to perform examples.

In addition to the processor 15, the node includes a memory 12 for storing various data including data related to the application 18, an input unit 13 for receiving user input, an output unit 14 for displaying various information, and communication with other terminals. It may be configured to include various components such as the transceiver 16 for communication, and the processor 15 may 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, a solid state drive (SSD), a web hard, and the like.

The input unit 13 and the output unit 14 may be simultaneously configured as input/output units 13 and 14 in the form of a touch display in a smartphone. The input unit 13 may include a physical keyboard device, a touch display, an image input sensor constituting the camera 17 , a sensor for receiving a fingerprint, a sensor for recognizing an iris, and the like. The output unit 14 may be configured as a monitor, a touch display, or the like.

The transceiver 16 may include a transmitter, a receiver, or a transceiver.

In addition, the terminals constituting each of the plurality of nodes are all types that can be connected to an external server through a wireless communication network, such as a smart phone, a mobile phone, a personal digital assistant (PDA), a portable multimedia player (PMP), a tablet PC, etc. may include a handheld-based wireless communication device of can do.

In addition, the terminal constituting each of the plurality of nodes may be implemented as a server operated by a specific company.

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

Referring to FIG. 5 , the terminal may operate as a node 10 of a block chain by being connected through a plurality of different terminals to each other.

At this time, the blockchain described in the present invention consists of a plurality of transaction information in blocks, and connects several blocks like a chain using a hash, a peer-to-peer (P2P) network. It is an algorithm for jointly managing security information by distributing and storing information in digital equipment of nodes 10 that are participants (peers, peers) rather than central management servers in a distributed environment. By using such a block chain, it is impossible to forge and falsify data, so reliable and secure transactions and data processing can be performed even without an authoritative intermediary.

In order to implement such a block chain, the 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 is a node 10 of the block chain. It may be composed of a processor in a state in which an application including an algorithm required to operate as a

The terminals constituting each of the plurality of nodes 10 may store information shared on the block chain in the secure area of the memory or in the secure area of the database.

That is, in the present invention, a plurality of nodes 10 can be configured based on various types of block chains, such as a participant participating as a node 10 in a block chain consisting of a homogeneous device or a heterogeneous device.

On the other hand, the block chain network composed of the nodes 10 according to the present invention may be a permission type block chain network. The blockchain network composed of nodes 10 shares the ledger to check the consistency (reliability) of data, and only authorized users can join. In the case of permission-type blockchain, data access rights can be customized in consideration of the company's business characteristics (personal information infringement problem). Specifically, the permission-type blockchain network checks the data consistency between reliable nodes by sharing the ledger between cancer screening devices, user terminals, and cancer screening-related institutions, and grants different rights to read/write/delete data. can be For example, in a blockchain network composed of nodes, participants who can participate in the read, write, and consensus process are predetermined, and specific entities can be newly added or removed as needed.

Based on the above-described configuration, the present invention enables authentication of cancer screening-related organizations when registering cancer screening data using a cancer screening device in a block chain so that two-way authentication between users and organizations is performed on the block chain and through the block chain. Through the comparison of the checkup information stored in each of the plurality of nodes 10 when the checkup information is changed without permission, by including the checkup information that has been bi-directionally authenticated in the block, which is the storage unit of the block chain, and storing and sharing it in each of the plurality of nodes 10 It is possible to ensure the security, integrity, and reliability of the checkup information by supporting the verification of forged checkup information and blocking the forgery at the source.

6 illustrates 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 more confidential encryption and decryption method by converting cancer screening data with a plurality of secret keys is illustrated.

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

In the present invention, the fourth data, which is the examination metadata, to generate a secret key, and to encrypt the first data, the second data, and the third data with the secret key are disclosed in FIG. 3 as a main embodiment. It is not limited.

Referring to FIG. 6 , in order to improve confidentiality and reliability, a plurality of data may be used as a complex random number. For example, the second data, which is numerical data, is converted in a predetermined manner to generate fifth data, and based on the generated fifth data, the first data and the third data, which are core cancer screening data, are converted according to a predetermined method. The sixth data may be generated by conversion, and the seventh data including conversion method information may be generated. Thereafter, based on the first encryption key generated by using the fourth data as a random number and the second encryption key generated with a separate random number obtainable from the user terminal node, the 7th data and the 6th data are encrypted respectively to improve confidentiality. have. In the case of this method, the multi-stage encryption method is adopted in that the decryption of the seventh data including the conversion method data is prioritized based on a separate second encryption key to obtain the first and third 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 checks in advance whether the user terminal registered in the cancer screening device matches the identification value of the current user terminal when performing cancer screening in the cancer screening device. It is controlled to perform cancer screening only when it is determined and matched, and it is possible to build a complex security system in that it is possible to obtain a second secret key capable of decrypting the seventh data as a separate random number obtainable from the user terminal. .

Referring to FIG. 6 , a first secret key is generated by using the fourth data such as cancer screening device unique information and cancer screening time as random numbers (S410). In addition, cancer screening data including the first data to the fourth data is generated ( S403 ).

In addition, the second data is converted by the first method to generate 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 are 125, 124, and 101, the index values can be 0012500, 0012400, 0010100 as they are, or 00800, 00700, and 00200 with each digit added to become the index values. and the conversion method is not limited. The index number may include the same numerical sequence at the front and rear ends so that it can be distinguished based on the number. In the above-described example, the front-end numeric sequence 00 and the rear-end numeric sequence 00 are described, but this is merely an example and is not limited thereto. If the values of R, G, and B are the same, it can be set to add or subtract a specific value from among R, G, and B so that different index values are obtained, and then the preceding number sequence and the rear number sequence can be added.

In addition, the first data and the third data are converted in the second method based on the fifth data to generate the sixth data (S405). After dividing the first data and the third data in a certain way, the index numerical sequence obtained in the previous step (S404) is assigned to each block partitioned in ascending or descending order so that the order can be understood, and then the blocks are randomly shuffled. The sixth data may be generated. This sixth data becomes completely randomly shuffled data unless information on index values is identified, and user identity information and cancer screening data contained therein cannot be derived.

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

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

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

In addition, an encrypted message is generated using the encrypted sixth data and the seventh data (S417).

In the decryption step, the private key of the receiving node is obtained (S418), the first private key is decrypted with the private key of the receiving node (S419), and the first private key is obtained (S420). In addition, 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 a second private key is obtained (S423).

In addition, the seventh data may be decrypted with the second secret key (S424), the sixth data may be decrypted with the first secret key (S424), and first and third data may be obtained with the sixth data (S424). In this way, the cancer screening data is acquired from the receiving node (S425).

When implementing the embodiment of the present invention using hardware, ASICs (application specific integrated circuits) or DSPs (digital signal processors), DSPDs (digital signal processing devices), PLDs (programmable logic devices) 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. In addition, the structure of data used in the above-described method may be recorded in a computer-readable storage medium through various means. Program storage devices that may be used to describe a storage device comprising executable computer code for performing the various methods of the present invention should not be construed as including transitory objects such as carrier waves or signals. do. The computer-readable storage medium includes a storage medium such as a magnetic storage medium (eg, a ROM, a floppy disk, a hard disk, etc.) and an optically readable medium (eg, a CD-ROM, a DVD, etc.).

The embodiments described above are those in which elements and features of the present invention are combined 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. In addition, it is also possible to configure an embodiment of the present invention by combining some elements and/or features. The order of operations described in embodiments of the invention may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is obvious that claims that are not explicitly cited in the claims can be combined to form an embodiment or included as a new claim by amendment after filing.

It will be apparent to those skilled in the art to which the present invention pertains that the present invention can be embodied in other forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above embodiments should be considered in all respects as illustrative and not restrictive. The scope of the present invention should be determined by a 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 institution 50: Node

Claims (12)

In the method of operating a node constituting a block chain, the node includes an input unit, an output unit, a memory, a camera, a transceiver, and a processor,
The process of acquiring the user's cancer screening data through the cancer screening device;
A process of identifying cancer types for each 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 disease codes classified in advance;
generating a transaction based on cancer screening data including information on cancer screening for each disease code;
generating a hash value based on the transaction;
A method of operating a node constituting a block chain comprising the step of transmitting the hash value to other nodes constituting the block chain. The method of claim 1,
The method of operating a node constituting a block chain further comprising the step of confirming whether the cancer screening data is registered in the shared ledger of the block chain. 3. The method of claim 2,
The process of sharing the examination data of the other nodes by searching the shared ledger;
comparing the checkup data of the node with the checkup data of the other nodes;
The operation method of the node constituting the block chain further comprising the step of outputting the result of the comparison. 3. The method of claim 2,
The process of sharing the examination data of the other nodes by searching the shared ledger;
determining a recommended hospital based on at least one of medical information and a disease code based on the checkup data of the node and the checkup data of the other nodes;
The method of operating a node constituting a block chain further comprising the step of outputting information on the recommended hospital. The method of claim 1,
The node constituting the block chain is an operating method of a node constituting the block chain including a write/readable cancer checker node, a readable user terminal node, and a readable cancer screening-related institution node. 6. The method of claim 5,
In the process of acquiring the user's cancer screening data through the cancer screening device,
By comparing the user terminal identification code previously registered in the cancer screening device with the user terminal identification code used when acquiring cancer screening data,
A method of operating a node constituting a block chain that acquires a user's cancer checkup data through a cancer checker when the user terminal identification code is the same. 6. The method of claim 5,
When a cancer screening data deletion request transaction occurs in the user terminal node,
The method of operating a node in which the cancer screening node and the cancer screening-related institution node constitute a block chain that deletes cancer screening data according to the requested transaction and propagates the deleted transaction to all nodes. 6. The method of claim 5,
The cancer screening device node generates a secret key by using at least one of unique information of the cancer screening device, a cancer screening time, and a user login time as a random number,
The cancer checker node encrypts the cancer checkup data with a secret key to generate an encrypted message,
Encrypting the private key using the public key of each of the user terminal node and the cancer screening-related institution node,
The cancer screening node transmits the encrypted message and the encrypted secret key to the receiving node,
Each of the user terminal node and cancer screening-related institution node decrypts with a private key to obtain a secret key,
The method of operating a node in which the user terminal node and the cancer examination-related institution node constitute a block chain for receiving cancer examination data by decrypting the encrypted message with the obtained secret key. The method of claim 1,
The process of acquiring the user's cancer screening data through the cancer screening device is
The operation method of the node constituting the block chain, which is a process of composing cancer screening data by obtaining an optical checkup value for at least one of lung cancer, liver cancer, colorectal cancer, stomach cancer, and breast cancer, through the user's blood. 9. The method of claim 8,
The cancer screening data includes first data including user identity information, second data including R, G, and B data, third data including examination result data, and fourth data including examination metadata, ,
The cancer screening device node generates a first secret key by using at least one of unique information of the cancer screening device, a cancer screening time, and a user login time as a random number,
The user terminal node generates a second secret key by using the unique data as a random number,
The cancer screening node converts the second data in a first manner to generate fifth data,
The cancer screening node generates sixth data by converting the first data and the third data in a second method based on the fifth data,
The cancer screening 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 private key and the second private key by using the public keys of each of the user terminal node and the cancer screening-related institution node;
The cancer screening 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 institution node decrypts it with a private key to obtain a first private key and a second secret key,
The user terminal node and the cancer screening-related institution node decrypt the seventh data with the obtained second secret key, decrypt the sixth data with the first secret key, and receive the first and third data as the sixth data. How the nodes that make up the blockchain operate. In the device of the node constituting the block chain,
input unit;
output unit;
a memory in which the application is stored;
camera;
transceiver; and
includes a processor;
The processor is
Acquire the user's cancer screening data through the cancer screening device,
Identifies 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 disease codes classified in advance,
generating a transaction based on cancer screening data including information on cancer screening for each disease code;
generate a hash value based on the transaction;
A device configured to transmit the hash value to other nodes constituting the blockchain. A computer program configured to perform the method according to any one of claims 1 to 10, recorded on a computer readable storage medium.

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