CN113111364A - Block chain data privacy protection system and protection method thereof - Google Patents
Block chain data privacy protection system and protection method thereof Download PDFInfo
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- 238000007726 management method Methods 0.000 description 14
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- G06F21/60—Protecting data
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/45—Structures or tools for the administration of authentication
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- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
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- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2141—Access rights, e.g. capability lists, access control lists, access tables, access matrices
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Abstract
The invention discloses a block chain data privacy protection system and a protection method thereof, wherein the system comprises a user management unit and a privacy data encryption storage unit, wherein the user management unit comprises a data entry module, an identity management module and an identity verification module; the privacy data encryption storage unit comprises a privacy data classification module, storage key generation modules at all levels, a classification encryption module and a plurality of block chain storage nodes, the privacy data classification module is used for classifying data uploaded by a user according to set rules, the storage key generation modules at all levels are used for generating public keys and private keys at all levels on the block chain storage nodes according to the set rules, and the classification encryption module is used for encrypting received classified information by adopting the public keys at all levels respectively and storing the information to the corresponding block chain storage nodes. The invention sets an access verification link and adopts multi-key classification of the private data, thereby effectively preventing data leakage and improving the protection intensity of the private data.
Description
Technical Field
The invention relates to the technical field of block chain data security management, in particular to a block chain data privacy protection system and a block chain data privacy protection method.
Background
The blockchain is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism and an encryption algorithm. The blocks are linked through random hashing, the next block contains the hash value of the previous block, one block is connected with one block successively along with the expansion of information exchange, and the formed result is called a block chain. In the existing block chain information privacy protection technology, a random number is added to information for storing a certificate to generate a hash value, then a stakeholder or a witness signs again to generate a hash value, and finally the hash value is recorded on a block chain. Although the above method is beneficial to data privacy protection to a certain extent, the scheme requires multiple keys, which is reflected in that in the process of using a personal private key to sign uplink, a stakeholder needs to record scrambling code information or a decryption key for the transaction, and the risk of the user on key management is increased. Therefore, a set of more reliable and flexible block chain data privacy protection technologies needs to be further researched and developed by those skilled in the art.
Disclosure of Invention
The invention aims to provide a block chain data privacy protection system and a protection method thereof, which are used for setting an access verification link and adopting multi-key classification of private data, thereby effectively preventing data leakage and improving the protection strength of the private data.
In order to achieve the purpose, the invention provides the following scheme:
a block chain data privacy protection system comprises a user management unit and a private data encryption storage unit, wherein the user management unit comprises a data entry module, an identity management module and an identity verification module, the data entry module is used for entering data uploaded by a user, the identity management module is used for establishing the digital identity and the corresponding ID (identity) of the user and setting a login key, and the identity verification module is used for verifying the identity of the user; the privacy data encryption storage unit comprises a privacy data classification module, storage key generation modules at all levels, a hierarchical encryption module and a plurality of block chain storage nodes, the privacy data classification module is used for classifying data uploaded by a user according to a set rule and sending classified information to the hierarchical encryption module, the storage key generation modules at all levels are used for generating public keys and private keys at all levels on the block chain storage nodes according to the set rule, and the hierarchical encryption module is used for encrypting the received classified information by adopting the public keys at all levels respectively and storing the information to the corresponding block chain storage nodes.
Furthermore, the user management unit further comprises a data reading module, the data reading module is used for downloading and reading data of the blockchain storage nodes, the private data encryption storage unit further comprises an authorization module and a grading decryption module, the grading decryption module is used for decrypting the encrypted data of each blockchain storage node by adopting each grade of private key and transmitting the decrypted data to the data reading module, and the authorization module authorizes each grade of private key to a user.
Further, the data uploaded by the user comprises three categories of shared information, general encryption information and absolute sensitive information; the encryption grades of the hierarchical encryption module are divided into three encryption grades of public display, authorized third party identification and private secret identification correspondingly classified information.
The invention also provides a block chain data privacy protection method, which is applied to the block chain data privacy protection system and comprises the following steps:
s1, the user registers the account number, registers in the identity management module, obtains the digital identity and the corresponding ID identification, and sets the login key;
s2, the user logs in the system, inputs ID identification and login key, the ID authentication module authenticates the ID, and judges whether the input ID identification and login key are consistent with the registered ID identification and login key;
s3, if the data are consistent, the user uploads or downloads the data;
and S4, when the user uploads data, the privacy data classification module classifies the data uploaded by the user according to a set rule and sends the classified information to the hierarchical encryption module, and the hierarchical encryption module encrypts the received classified information respectively by adopting public keys at all levels and stores the information in the corresponding block chain storage nodes.
Further, in step S4, the classifying module of private data classifies the data uploaded by the user according to a set rule, and specifically includes:
the user selects the type of the uploaded data, the type comprises three categories of shared information, general encryption information and absolute sensitive information, and the private data classification module classifies the uploaded data according to the selection of the user.
Further, in step S3, the downloading of data by the user includes the following steps:
the hierarchical decryption module is used for decrypting the encrypted data of each block chain storage node by adopting each level of private key and transmitting the decrypted data to the data reading module;
the data reading module is used for downloading and reading data of the blockchain storage node.
Further, the hierarchical decryption module is configured to decrypt the encrypted data of each block chain storage node by using each level of private key, and transmit the decrypted data to the data reading module, and specifically includes:
each level of private keys respectively comprise a shared information private key, a general encrypted information private key and an absolute secret sensitive information private key;
and displaying the shared information after decryption by adopting the shared information private key, displaying the general encrypted information after decryption by adopting the general encrypted information private key, and displaying the absolute sensitive information after decryption by adopting the absolute sensitive information private key.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: according to the block chain data privacy protection system and the block chain data privacy protection method, on one hand, a user can obtain initial authority for uploading and downloading data through account setting, random login of illegal personnel is avoided, and tracking of the user can be achieved through an ID (identity); on the other hand, the shared information, the general encrypted information and the absolute sensitive information are encrypted according to the security level hierarchy, so that the reliability and the security of private data encryption are improved, data leakage can be effectively prevented, the access permissions of different visitors are indirectly set, corresponding data can be obtained through decryption only when the corresponding private key is possessed, and the protection strength of the private data is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a block chain data privacy protection system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a block chain data privacy protection system and a protection method thereof, which are used for setting an access verification link and adopting multi-key classification of private data, thereby effectively preventing data leakage and improving the protection strength of the private data.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the block chain data privacy protection system provided in the embodiment of the present invention includes a user management unit and a private data encryption storage unit, where the user management unit includes a data entry module, an identity management module, and an identity verification module, the data entry module is configured to enter data uploaded by a user, the identity management module is configured to establish a digital identity and a corresponding ID of the user, and set a login key, and the identity verification module is configured to verify an identity of the user; the privacy data encryption storage unit comprises a privacy data classification module, storage key generation modules at all levels, a hierarchical encryption module and a plurality of block chain storage nodes, the privacy data classification module is used for classifying data uploaded by a user according to a set rule and sending classified information to the hierarchical encryption module, the storage key generation modules at all levels are used for generating public keys and private keys at all levels on the block chain storage nodes according to the set rule, and the hierarchical encryption module is used for encrypting the received classified information by adopting the public keys at all levels respectively and storing the information to the corresponding block chain storage nodes.
The user management unit further comprises a data reading module, the data reading module is used for downloading and reading data of the blockchain storage nodes, the private data encryption storage unit further comprises an authorization module and a grading decryption module, the grading decryption module is used for decrypting the encrypted data of the blockchain storage nodes by adopting various grades of private keys and transmitting the decrypted data to the data reading module, and the authorization module authorizes the various grades of private keys to a user.
The data uploaded by the user comprises three categories of shared information, general encryption information and absolute security sensitive information; the encryption grades of the hierarchical encryption module are divided into three encryption grades of public display, authorized third party identification and private secret identification correspondingly classified information.
The invention also provides a block chain data privacy protection method, which is applied to the block chain data privacy protection system and comprises the following steps:
s1, the user registers the account number, registers in the identity management module, obtains the digital identity and the corresponding ID identification, and sets the login key;
s2, the user logs in the system, inputs ID identification and login key, the ID authentication module authenticates the ID, and judges whether the input ID identification and login key are consistent with the registered ID identification and login key;
s3, if the data are consistent, the user uploads or downloads the data;
and S4, when the user uploads data, the privacy data classification module classifies the data uploaded by the user according to a set rule and sends the classified information to the hierarchical encryption module, and the hierarchical encryption module encrypts the received classified information respectively by adopting public keys at all levels and stores the information in the corresponding block chain storage nodes.
In step S4, the classifying module classifies the data uploaded by the user according to a set rule, and specifically includes:
the user selects the type of the uploaded data, the type comprises three categories of shared information, general encryption information and absolute sensitive information, and the private data classification module classifies the uploaded data according to the selection of the user.
In step S3, the downloading of data by the user includes the following steps:
the hierarchical decryption module is used for decrypting the encrypted data of each block chain storage node by adopting each level of private key and transmitting the decrypted data to the data reading module; the secret keys at all levels respectively comprise a shared information secret key, a general encrypted information secret key and an absolute sensitive information secret key, the shared information is displayed after the secret keys are decrypted by the shared information secret key, the general encrypted information is displayed after the secret keys are decrypted by the general encrypted information secret key, and the absolute sensitive information is displayed after the secret keys are decrypted by the absolute sensitive information secret key.
The data reading module is used for downloading and reading data of the blockchain storage node.
Therefore, in the method, the user masters the privacy public initiative and can authorize the corresponding public key of the third party according to the requirement. All data are on the block chain, privacy is protected through hierarchical encryption, information recognized by people with different authorities is different, but the information is really placed on the block chain in a traceable manner, privacy is protected, and application of other block chain technologies is not affected.
According to the block chain data privacy protection system and the block chain data privacy protection method, on one hand, a user can obtain initial authority for uploading and downloading data through account setting, random login of illegal personnel is avoided, and tracking of the user can be achieved through an ID (identity); on the other hand, the shared information, the general encrypted information and the absolute sensitive information are encrypted according to the security level hierarchy, so that the reliability and the security of private data encryption are improved, data leakage can be effectively prevented, the access permissions of different visitors are indirectly set, corresponding data can be obtained through decryption only when the corresponding private key is possessed, and the protection strength of the private data is improved.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A blockchain data privacy protection system, comprising: the system comprises a user management unit and a private data encryption storage unit, wherein the user management unit comprises a data entry module, an identity management module and an identity verification module, the data entry module is used for entering data uploaded by a user, the identity management module is used for establishing a digital identity and a corresponding ID (identity) of the user and setting a login key, and the identity verification module is used for verifying the identity of the user; the privacy data encryption storage unit comprises a privacy data classification module, storage key generation modules at all levels, a hierarchical encryption module and a plurality of block chain storage nodes, the privacy data classification module is used for classifying data uploaded by a user according to a set rule and sending classified information to the hierarchical encryption module, the storage key generation modules at all levels are used for generating public keys and private keys at all levels on the block chain storage nodes according to the set rule, and the hierarchical encryption module is used for encrypting the received classified information by adopting the public keys at all levels respectively and storing the information to the corresponding block chain storage nodes.
2. The system according to claim 1, wherein the user management unit further includes a data reading module configured to download and read data of the blockchain storage nodes, the private data encryption storage unit further includes an authorization module and a hierarchical decryption module, the hierarchical decryption module is configured to decrypt the encrypted data of each blockchain storage node using each level of private key and transmit the decrypted data to the data reading module, and the authorization module authorizes each level of private key to the user.
3. The system according to claim 1, wherein the user uploaded data includes three categories of shared information, general encrypted information, and privacy sensitive information; the encryption grades of the hierarchical encryption module are divided into three encryption grades of public display, authorized third party identification and private secret identification correspondingly classified information.
4. A method for protecting privacy of blockchain data, applied to the system for protecting privacy of blockchain data according to any one of claims 1 to 3, comprising the steps of:
s1, the user registers the account number, registers in the identity management module, obtains the digital identity and the corresponding ID identification, and sets the login key;
s2, the user logs in the system, inputs ID identification and login key, the ID authentication module authenticates the ID, and judges whether the input ID identification and login key are consistent with the registered ID identification and login key;
s3, if the data are consistent, the user uploads or downloads the data;
and S4, when the user uploads data, the privacy data classification module classifies the data uploaded by the user according to a set rule and sends the classified information to the hierarchical encryption module, and the hierarchical encryption module encrypts the received classified information respectively by adopting public keys at all levels and stores the information in the corresponding block chain storage nodes.
5. The method for protecting privacy of blockchain data according to claim 4, wherein in the step S4, the classifying module of privacy data classifies the data uploaded by the user according to a set rule, specifically including:
the user selects the type of the uploaded data, the type comprises three categories of shared information, general encryption information and absolute sensitive information, and the private data classification module classifies the uploaded data according to the selection of the user.
6. The method for protecting privacy of blockchain data according to claim 5, wherein in the step S3, the step of downloading data by a user includes the steps of:
the hierarchical decryption module is used for decrypting the encrypted data of each block chain storage node by adopting each level of private key and transmitting the decrypted data to the data reading module;
the data reading module is used for downloading and reading data of the blockchain storage node.
7. The method according to claim 6, wherein the hierarchical decryption module is configured to decrypt the encrypted data of each blockchain storage node using each level of private key, and transmit the decrypted data to the data reading module, and specifically includes:
each level of private keys respectively comprise a shared information private key, a general encrypted information private key and an absolute secret sensitive information private key,
and displaying the shared information after decryption by adopting the shared information private key, displaying the general encrypted information after decryption by adopting the general encrypted information private key, and displaying the absolute sensitive information after decryption by adopting the absolute sensitive information private key.
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| CN113469692A (en) * | 2021-07-26 | 2021-10-01 | 永旗(北京)科技有限公司 | Internet of things data transaction method based on block chain |
| CN113743955A (en) * | 2021-08-06 | 2021-12-03 | 广西综合交通大数据研究院 | Food material traceability data security access control method based on intelligent contract |
| CN113836603A (en) * | 2021-09-27 | 2021-12-24 | 科讯惠(深圳)科技有限公司 | Cloud data management system and method based on consumption data and block chain technology |
| CN114172722A (en) * | 2021-12-06 | 2022-03-11 | 国网新疆电力有限公司信息通信公司 | Power consumer access control method and system based on block chain intelligent contract |
| CN114186647A (en) * | 2021-11-22 | 2022-03-15 | 北京恒华伟业科技股份有限公司 | Concrete test block based on RFID technology and test data tracing method thereof |
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| CN113469692A (en) * | 2021-07-26 | 2021-10-01 | 永旗(北京)科技有限公司 | Internet of things data transaction method based on block chain |
| CN113743955A (en) * | 2021-08-06 | 2021-12-03 | 广西综合交通大数据研究院 | Food material traceability data security access control method based on intelligent contract |
| CN113836603B (en) * | 2021-09-27 | 2023-05-30 | 科讯惠(深圳)科技有限公司 | Cloud data management system and method based on consumption data and blockchain technology |
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| CN114398668A (en) * | 2021-12-14 | 2022-04-26 | 中国民用航空飞行学院 | Civil aviation privacy data protection and storage system based on block chain |
| CN114389879A (en) * | 2022-01-13 | 2022-04-22 | 重庆东电通信技术有限公司 | Internet of things terminal data management and control system |
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| CN115189966A (en) * | 2022-09-06 | 2022-10-14 | 江苏荣泽信息科技股份有限公司 | Block chain private data encryption and decryption service system |
| CN115189966B (en) * | 2022-09-06 | 2022-12-06 | 江苏荣泽信息科技股份有限公司 | Block chain private data encryption and decryption service system |
| CN115499193A (en) * | 2022-09-14 | 2022-12-20 | 西南石油大学 | Rural tourism passenger privacy protection system and method based on block chain |
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