技术领域technical field
本发明涉及医疗信息共享技术领域，尤其是基于区块链技术的电子病历共享查询方法。The invention relates to the technical field of medical information sharing, in particular to an electronic medical record sharing query method based on block chain technology.
背景技术Background technique
随着大数据、云存储等技术的不断发展，数据的共享和查询要求越来越高。电子病历和医疗信息的共享已经促使医疗行业跨入了数据共享时代。各个医院均采用电子病历方法记录用户的就诊信息，包括门诊病历、住院病历和一些图形图像信息。电子病历的制作过程包括用户信息采集、传输、统计整理和存储，电子病历信息既可以满足传统纸质病历记录要求，还能节省纸张，存储归档更为方便。但是，目前的电子病历仅仅存储在各个医院的档案库或资料室，而用户本身却不能随时随地的进行查询，用户一旦更换医生或转院治疗将无法为自己的医生提供之前的历史病历，这不仅对用户是一种损失，更是对历史病历信息的资源浪费。With the continuous development of technologies such as big data and cloud storage, the requirements for data sharing and query are getting higher and higher. The sharing of electronic medical records and medical information has prompted the medical industry to enter the era of data sharing. Each hospital adopts the method of electronic medical records to record the medical information of users, including outpatient medical records, inpatient medical records and some graphic image information. The production process of electronic medical records includes user information collection, transmission, statistical sorting and storage. Electronic medical record information can not only meet the requirements of traditional paper medical records, but also save paper and make storage and archiving more convenient. However, the current electronic medical records are only stored in the archives or reference rooms of various hospitals, and users themselves cannot query anytime and anywhere. It is a loss to users, and it is a waste of resources on historical medical record information.
因此，有必要对电子病历存储查询进行改进，实现异地电子病历共享查询，充分利用历史病历数据，用于健康状态趋势分析，为用户提供行之有效的诊断方案。本申请中所述的异地是指出具电子病历单位以外的节点。Therefore, it is necessary to improve the storage and query of electronic medical records, realize the shared query of electronic medical records in different places, make full use of historical medical record data, use it for health status trend analysis, and provide users with effective diagnostic solutions. The off-site mentioned in this application refers to a node other than the unit with electronic medical records.
发明内容Contents of the invention
针对上述技术不足，本发明的目的在于提供一种基于区块链技术的电子病历共享查询方法，利用区块链技术的去中心化和分布式存储的特点，将病历信息加密存储在区块链中，实现病历信息更好的共享，用户可以随时随地查询历史电子病历信息。In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a method for sharing and querying electronic medical records based on block chain technology, which utilizes the characteristics of decentralization and distributed storage of block chain technology to encrypt and store medical record information in the block chain Among them, better sharing of medical record information is realized, and users can query historical electronic medical record information anytime and anywhere.
为了实现上述目的，本发明采用的技术方案如下：In order to achieve the above object, the technical scheme adopted in the present invention is as follows:
基于区块链技术的电子病历共享查询方法，包括如下步骤：The electronic medical record sharing query method based on blockchain technology includes the following steps:
步骤S1，用户节点申请加入区块链并发送身份认证信息，进行用户身份验证；若用户节点认证合法，则登记其身份信息并分配一对秘钥，即公钥和私钥，用于电子病历信息的加密，并允许用户节点信息加入电子病历信息共享查询的区块链中；否则，阻止该节点加入共享查询的区块链；Step S1, the user node applies to join the blockchain and sends identity authentication information to perform user identity verification; if the user node authentication is legal, register its identity information and assign a pair of secret keys, namely public key and private key, for electronic medical records Encryption of information, and allow user node information to join the blockchain of electronic medical record information sharing query; otherwise, prevent the node from joining the blockchain of sharing query;
步骤S2，认证合法的用户节点对电子病历信息进行加密处理，并进行双向验证，包括验证电子病历信息的真实性、发送电子病历信息节点身份的合法性；通过双向验证的电子病历将允许上传至整个电子病历信息共享查询的区块链中；否则阻止该电子病历加入共享查询的区块链；Step S2, the authenticated user node encrypts the electronic medical record information and performs two-way verification, including verifying the authenticity of the electronic medical record information and the legality of the identity of the node sending the electronic medical record information; the electronic medical record that passes the two-way verification will be allowed to be uploaded to In the block chain of the entire electronic medical record information sharing query; otherwise, the electronic medical record is prevented from joining the block chain of the shared query;
步骤S3，可信服务器对验证为真实的电子病历信息进行SHA256哈希算法再加密，加密生成一段上传的电子证据的数字指纹，并加以相应的时间戳，用于防止电子病历篡改或信息泄漏；Step S3, the trusted server re-encrypts the verified electronic medical record information with the SHA256 hash algorithm, encrypts and generates a digital fingerprint of an uploaded electronic evidence, and adds a corresponding time stamp to prevent electronic medical record tampering or information leakage;
步骤S4，将两次加密后的电子病历保存至共享查询的区块链，并上传至云端，其中，电子病历信息包括：病历信息、电子证据数字指纹、节点登记信息、哈希值、时间戳；Step S4, save the twice-encrypted electronic medical record to the shared query blockchain and upload it to the cloud, wherein the electronic medical record information includes: medical record information, electronic evidence digital fingerprint, node registration information, hash value, time stamp ;
步骤S5，异地节点提供私钥进行身份证明，身份验证合法后获取共享查询的区块链中的电子病历，并由可信服务器进行解密，完成节点电子病历异地查询。In step S5, the remote node provides a private key for identity verification. After the identity verification is legal, the electronic medical record in the shared query blockchain is obtained, and the trusted server decrypts it to complete the remote query of the node's electronic medical record.
进一步地，在步骤S1中，电子病历上传至共享查询的区块链之前用户节点采用公钥或私钥其中之一进行电子病历首次加密。Further, in step S1, before the electronic medical record is uploaded to the block chain of the shared query, the user node uses one of the public key or the private key to encrypt the electronic medical record for the first time.
进一步地，在步骤S3中，可信服务器对验证为真实的电子病历信息进行非对称的SHA256哈希算法再次加密，用于电子病历共享查询过程隐私保护。非对称加密可满足信息的安全要求和所有权验证需求而集成到区块链中的加密算法，常用的有RSA、Rabin、Elgamal、Ecc等算法。其中，非对称的SHA256哈希算法具有单向性、定长性和随机性特点，加密的信息将被编码为特定长度的由字母和数字组成的字符串，实现信息传播过程中的隐私保护。Further, in step S3, the trusted server re-encrypts the verified electronic medical record information using the asymmetric SHA256 hash algorithm for privacy protection in the electronic medical record sharing query process. Asymmetric encryption is an encryption algorithm that can be integrated into the blockchain to meet the security requirements of information and ownership verification requirements. Commonly used algorithms include RSA, Rabin, Elgamal, and Ecc. Among them, the asymmetric SHA256 hash algorithm has the characteristics of one-way, fixed length and randomness. The encrypted information will be encoded into a string of letters and numbers of a specific length to realize privacy protection in the process of information dissemination.
进一步地，在步骤S4中，用户节点将两次加密的电子病历信息封装成独立的区块，其中，区块包括区块头和区块体，区块头用于存放节点身份信息，区块体用于存放当前版本号、前一区块地址、目标哈希值、数字指纹和时间戳。Further, in step S4, the user node encapsulates the twice-encrypted electronic medical record information into an independent block, wherein the block includes a block header and a block body, the block header is used to store node identity information, and the block body uses It stores the current version number, previous block address, target hash value, digital fingerprint and timestamp.
更进一步的，在步骤S4中，电子病历信息封装成独立的区块，各区块按时间顺序首尾相接。Furthermore, in step S4, the electronic medical record information is encapsulated into independent blocks, and each block is connected end to end in chronological order.
优选地，在步骤S5中，在异地节点查询电子病历时，节点提出电子病历查询请求，并出示私钥进行身份证明；若节点的身份验证为合法，则该节点获取共享查询的区块链中的电子病历，并由可信服务器进行解密，否则终止节点查询申请。既能进行电子病历信息的实时共享查询，又能防止电子病历信息遭受不法分子的攻击而泄露。Preferably, in step S5, when the remote node inquires about the electronic medical record, the node submits an electronic medical record inquiry request and presents the private key for identity verification; The electronic medical records are decrypted by the trusted server, otherwise the node query application is terminated. It can not only carry out real-time shared query of electronic medical record information, but also prevent the electronic medical record information from being attacked by criminals and leaked.
与现有技术相比，本发明具有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
(1)本发明巧妙地采用了秘钥和算法两次加密，既能为电子病历共享查询提供保障，实现异地共享功能，又能保证电子病历信息的安全性，有效避免不法节点破解病历信息。该方法使用区块链的加密技术将每位用户的身份信息和病历信息进行加密，加密后将其封装成一个独立区块，区块头中存储用户身份等信息，区块体中存储用户所有的病历信息。而且，利用区块链的去中心化、数字加密、不可篡改和分布式共识等优点，将所有用户的病历信息区块按照时间先后顺序首尾相连，共同存储在整个电子病历共享查询区块链中，并通过私钥异地身份验证解密，进而，实现了用户自身电子病历信息的共享和异地实时查询。(1) The present invention skillfully adopts the secret key and the algorithm to encrypt twice, which can not only provide guarantee for the shared query of electronic medical records, realize the remote sharing function, but also ensure the security of electronic medical record information, and effectively prevent illegal nodes from cracking medical record information. This method uses blockchain encryption technology to encrypt each user's identity information and medical record information, and encapsulates it into an independent block after encryption. The block header stores user identity and other information, and the block body stores all user information. medical record information. Moreover, using the advantages of decentralization, digital encryption, non-tampering and distributed consensus of the blockchain, the medical record information blocks of all users are connected end to end in chronological order and stored together in the entire electronic medical record shared query blockchain. , and through remote identity verification and decryption of the private key, and then realize the sharing of the user's own electronic medical record information and real-time query in different places.
(2)另外，本发明在用户节点上传秘钥加密的电子病历信息时，需要对发送电子病历信息节点的身份合法性和电子病历信息的真实性进行双向验证，防止非法节点误传或随意上传，保证区块链存储合法的电子病历，保护电子病历区块链免受非法攻击。(2) In addition, when the user node uploads the electronic medical record information encrypted by the secret key in the present invention, it is necessary to carry out two-way verification on the identity legality of the node sending the electronic medical record information and the authenticity of the electronic medical record information, so as to prevent illegal nodes from misrepresenting or uploading at will , to ensure that the blockchain stores legal electronic medical records and protect the electronic medical record blockchain from illegal attacks.
(3)不仅如此，本发明的电子病历信息共享查询的前提是秘钥加密、私钥解密，以实现电子病历共享、信息隐私保护、电子病历查询的总过程。通过对电子病历信息的加密，上传至区块链，实现电子病历共享和异地实时查询，充分利用病历历史信息，分析判断用户健康状态变化趋势，便于医生做出行之有效的就诊诊断方案。(3) Not only that, the premise of the electronic medical record information sharing query of the present invention is secret key encryption and private key decryption, so as to realize the overall process of electronic medical record sharing, information privacy protection, and electronic medical record query. By encrypting the electronic medical record information and uploading it to the blockchain, the electronic medical record sharing and remote real-time query are realized, and the historical information of the medical record is fully utilized to analyze and judge the changing trend of the user's health status, which is convenient for doctors to make effective diagnosis plans.
附图说明Description of drawings
图1为本发明的共享查询流程图。Fig. 1 is a shared query flow chart of the present invention.
图2为电子病历信息加密流程图。Figure 2 is a flow chart of electronic medical record information encryption.
图3为异地共享查询流程图。Fig. 3 is a flow chart of remote sharing query.
具体实施方式detailed description
下面结合附图和实施例对本发明作进一步说明，本发明的实施方式包括但不限于下列实施例。The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.
实施例Example
如图1至图3所示，本发明提供一种基于区块链技术的电子病历共享查询方法，目的在于电子病历数据的整合和多次利用，杜绝数据资料浪费，方便各合法节点对历史电子病历查询。同时，判别用户身体健康状态变化趋势，为医生做出准确、行之有效的诊断方案提供了基础保障，为此，该方法具体实施包括如下步骤：As shown in Figures 1 to 3, the present invention provides a method for sharing and querying electronic medical records based on blockchain technology. Medical record inquiry. At the same time, identifying the changing trend of the user's health status provides a basic guarantee for doctors to make an accurate and effective diagnosis plan. For this reason, the specific implementation of the method includes the following steps:
第一步，用户节点申请加入区块链并发送身份认证信息，进行用户身份验证；若用户节点认证合法，则登记其身份信息并分配一对秘钥，即公钥和私钥，用于电子病历信息的加密，并允许用户节点信息加入电子病历信息共享查询的区块链中；否则，阻止该节点加入共享查询的区块链。其中，秘钥是查询不可或缺的设置，若未能设置秘钥则无身份验证解密的基础，便无法在异地实现查询。电子病历上传至共享查询的区块链之前用户节点采用公钥或私钥其中之一进行电子病历首次加密。更进一步地，身份登记时分配的秘钥是独一无二的，只要用户不将私钥告知他人，就不会存在电子病历信息泄露的事件。In the first step, the user node applies to join the blockchain and sends identity authentication information for user identity verification; if the user node authentication is legal, it registers its identity information and assigns a pair of secret keys, that is, a public key and a private key, for electronic Encryption of medical record information, and allow user node information to join the blockchain of electronic medical record information sharing query; otherwise, prevent the node from joining the blockchain of sharing query. Among them, the secret key is an indispensable setting for query. If the secret key is not set, there will be no basis for authentication and decryption, and the query cannot be realized in different places. Before the electronic medical record is uploaded to the blockchain of the shared query, the user node uses one of the public key or the private key to encrypt the electronic medical record for the first time. Furthermore, the secret key assigned during identity registration is unique, as long as the user does not disclose the private key to others, there will be no event of leakage of electronic medical record information.
第二步，认证合法的用户节点对电子病历信息进行加密处理，并进行双向验证，包括验证电子病历信息的真实性、发送电子病历信息节点身份的合法性。通过双向验证的电子病历将允许上传至整个电子病历信息共享查询的区块链中，否则阻止该电子病历加入共享查询的区块链。In the second step, the authenticated user node encrypts the electronic medical record information and performs two-way verification, including verifying the authenticity of the electronic medical record information and the legitimacy of the identity of the node sending the electronic medical record information. The electronic medical record that has passed the two-way verification will be allowed to be uploaded to the blockchain of the entire electronic medical record information sharing query, otherwise the electronic medical record will be prevented from joining the blockchain of the sharing query.
第三步，可信服务器对验证为真实的电子病历信息进行SHA256哈希算法再加密，加密生成一段上传的电子证据的数字指纹，并加以相应的时间戳，用于防止电子病历篡改或信息泄漏。进一步地，可信服务器对验证为真实的电子病历信息进行非对称的SHA256哈希算法再次加密，用于电子病历共享查询过程隐私保护。其中，非对称的SHA256哈希算法具有单向性、定长性和随机性特点，加密的信息将被编码为特定长度的由字母和数字组成的字符串，实现信息传播过程中的隐私保护。非对称的SHA256哈希算法作为电子病历的第二次加密，使电子病历信息更安全。In the third step, the trusted server re-encrypts the verified electronic medical record information with the SHA256 hash algorithm, encrypts and generates a digital fingerprint of an uploaded electronic evidence, and adds a corresponding time stamp to prevent electronic medical record tampering or information leakage . Further, the trusted server re-encrypts the verified electronic medical record information with the asymmetric SHA256 hash algorithm, which is used for privacy protection of the electronic medical record sharing query process. Among them, the asymmetric SHA256 hash algorithm has the characteristics of one-way, fixed length and randomness. The encrypted information will be encoded into a string of letters and numbers of a specific length to realize privacy protection in the process of information dissemination. The asymmetrical SHA256 hash algorithm is used as the second encryption of electronic medical records, making electronic medical record information more secure.
第四步，将两次加密后的电子病历保存至共享查询的区块链，并上传至云端，其中，电子病历信息包括：病历信息、电子证据数字指纹、节点登记信息、哈希值、时间戳。在加密完成时需要为该区块的信息加上时间戳，防止其被非法篡改。用户节点将两次加密的电子病历信息封装成独立的区块，其中，区块包括区块头和区块体，区块头用于存放节点身份信息，区块体用于存放当前版本号、前一区块地址、目标哈希值、数字指纹和时间戳。电子病历信息封装成独立的区块后按时间顺序首尾相接，形成按时间先后顺序的区块链。The fourth step is to save the twice-encrypted electronic medical record to the shared query blockchain and upload it to the cloud. The electronic medical record information includes: medical record information, electronic evidence digital fingerprint, node registration information, hash value, time stamp. When the encryption is completed, it is necessary to add a time stamp to the information of the block to prevent it from being illegally tampered with. The user node encapsulates the twice-encrypted electronic medical record information into an independent block. The block includes a block header and a block body. The block header is used to store the node identity information, and the block body is used to store the current version number, the previous Block address, target hash, digital fingerprint and timestamp. The electronic medical record information is encapsulated into independent blocks and connected end to end in chronological order to form a chronological blockchain.
第五步，异地节点提供私钥进行身份证明，身份验证合法后获取共享查询的区块链中的电子病历，并由可信服务器进行解密，完成节点电子病历异地查询。具体地，在异地节点查询电子病历时，节点提出电子病历查询请求，并出示私钥进行身份证明。若节点的身份验证为合法，则该节点获取共享查询的区块链中的电子病历，并由可信服务器进行解密，否则终止节点查询申请。In the fifth step, the remote node provides the private key for identity verification. After the identity verification is legal, the electronic medical record in the shared query blockchain is obtained, and the trusted server decrypts it to complete the remote query of the node's electronic medical record. Specifically, when querying electronic medical records at a remote node, the node makes an electronic medical record query request and presents a private key for identity verification. If the identity verification of the node is legal, the node obtains the electronic medical record in the block chain of the shared query and decrypts it by the trusted server; otherwise, the node query application is terminated.
本发明巧妙地利用了区块链技术的去中心化、分布式存储、分布式共识和不可篡改等特点，与用户的历史病历信息的共享、查询和保护相结合，调用历史可用资源，为医生做出准确、行之有效的诊断提供数据信息保障。本发明的主要目的在于充分利用历史电子病历，实现电子病历查询和异地共享，在异地共享的基础上，势必需要保障在共享过程中电子病历的信息安全，因此，本发明采用秘钥加密和算法加密的结合，只有具备秘钥才能实现查询认证。可以说，本发明能充分调用历史电子病历信息，保证电子病历在上传至区块链不被非法篡改，电子病历信息共享的同时，也能起到信息安全防护，与现有技术相比，具有突出的实质性特点和显著的进步，在医疗信息共享技术领域具有广阔的前进和和推广价值。The invention skillfully utilizes the characteristics of decentralization, distributed storage, distributed consensus and non-tampering of blockchain technology, combines with the sharing, query and protection of the user's historical medical record information, calls historical available resources, and provides medical services for doctors. Make accurate and effective diagnosis and provide data information protection. The main purpose of the present invention is to make full use of historical electronic medical records to realize electronic medical record query and remote sharing. On the basis of remote sharing, it is necessary to ensure the information security of electronic medical records during the sharing process. With the combination of encryption, query authentication can be realized only with the secret key. It can be said that the present invention can fully invoke historical electronic medical record information, ensure that the electronic medical record is not illegally tampered with when uploaded to the blockchain, and can also protect information security while sharing electronic medical record information. Compared with the prior art, it has With outstanding substantive features and significant progress, it has broad advancement and promotion value in the field of medical information sharing technology.
上述实施例仅为本发明的优选实施例，并非对本发明保护范围的限制，但凡采用本发明的设计原理，以及在此基础上进行非创造性劳动而作出的变化，均应属于本发明的保护范围之内。The above-described embodiments are only preferred embodiments of the present invention, and are not limitations on the scope of protection of the present invention. However, all changes made by adopting the design principle of the present invention and performing non-creative work on this basis should belong to the protection scope of the present invention. within.
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| CN201710798354.9ACN107579979A (en) | 2017-09-07 | 2017-09-07 | Shared query method of electronic medical records based on block chain technology |
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| CN201710798354.9ACN107579979A (en) | 2017-09-07 | 2017-09-07 | Shared query method of electronic medical records based on block chain technology |
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| CN107579979Atrue CN107579979A (en) | 2018-01-12 |
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| CN201710798354.9APendingCN107579979A (en) | 2017-09-07 | 2017-09-07 | Shared query method of electronic medical records based on block chain technology |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication | Application publication date:20180112 |