CN110298193B - Information sharing system and method based on block chain - Google Patents
Information sharing system and method based on block chain Download PDFInfo
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- CN110298193B CN110298193B CN201910497262.6A CN201910497262A CN110298193B CN 110298193 B CN110298193 B CN 110298193B CN 201910497262 A CN201910497262 A CN 201910497262A CN 110298193 B CN110298193 B CN 110298193B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- 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
- G06F21/6227—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 where protection concerns the structure of data, e.g. records, types, queries
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Abstract
The invention provides an information sharing system and method based on a block chain, which comprises an organization, a data source, a data abstract chain, a data sharing pool and a data sharing chain; the organization or the members thereof can provide data to the data source, and the process of providing the data forms a block structure to be added into the data summary chain; the organization or its members may obtain data from the data sharing pool, and the process of obtaining data forms a block structure to be added to the data sharing chain. The invention constructs a data sharing system based on the block chain technology, and two block chains are constructed through the system, so that the encryption and the tracing of the storage process and the sharing process of the data can be realized.
Description
Technical Field
The invention relates to the technical field of block chains, in particular to an information sharing system and method based on a block chain.
Background
In the big data era, data sharing can effectively solve the phenomenon of data island. Especially for some units or individuals with cross-department cooperation, the sharing and integration of data resources can effectively improve the working efficiency. In the sharing process of the existing data, the problems of difficult cross-department information collaboration, mutual trust loss, incapability of ensuring data safety, difficult data right determination, unretraceable data use and the like exist, and the problems become potential barriers to data sharing.
Disclosure of Invention
The invention aims to solve the technical problem of providing an information sharing system and method based on a block chain, and overcomes the defects in the existing data sharing process.
The invention adopts the following technical scheme:
a blockchain-based information sharing system, comprising: organization, a data source, a data abstract chain, a data sharing pool and a data sharing chain; the organization or the members thereof can provide data to the data source, and the process of providing the data forms a block structure to be added into the data summary chain; the organization or its members may obtain data from the data sharing pool, and the process of obtaining data forms a block structure to be added to the data sharing chain.
The data source stores data of all organizations or members, and the data in the data source is encrypted by a data owner.
The data sharing pool comprises encrypted data used for sharing by an organization or organization members, and the data sharing pool can clear out the data with expired sharing in time according to timeliness of the shared data.
An administrator of the information sharing system becomes a system Admin, the system Admin can create, change and delete organizations, and each organization comprises members with two rights: group Admin and other members.
The block structure of the data abstract chain comprises three parts, namely head, body and Signature; the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is a Hash value of a previous block of the block, and the Hash is a Hash value of a current block; num is the number of records of the data summary in the current block; the Body contains Num data summary records, and the Signature is a Signature performed by the information sharing system Admin.
If the current block is a creature block, the PreHash is null; the data summary record comprises: the data information comprises a summary ID, an owner of the data information, a group to which the owner of the data information belongs, summary information of the data, a Hash of the data, a timestamp, a signature of the owner of the data and a signature of the group to which the owner of the data belongs; the signature of the group to which the data owner belongs is completed by Admin of the corresponding organization to which the data owner belongs, and the system signature is completed by Admin of an information sharing system.
The block structure in the data sharing chain comprises three parts, namely Head, body and Signature;
the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is the Hash of a previous block of the block, and the Hash is the Hash of a current block; if the current block is a created block, the PreHash is null; num is the number of records of the data summary in the current block;
the Body contains Num data sharing records, and the sharing records comprise: sharing ID, data owner belonging group, data user belonging group, data Hash, shared data aging, time stamp, data owner signature, data owner belonging group signature and system signature;
the signature of the group to which the data owner belongs is completed by the group Admin of the corresponding organization to which the data owner belongs;
the system signature is completed by an information sharing system Admin;
the Signature is a Signature performed by the information sharing system Admin.
A block chain based information sharing method comprises a data providing process and a data sharing process,
a data providing process: the data owner signs the data and submits the data to the information sharing system for signature verification and audit, the system signs the signed data after the signature verification and audit is passed and adds the signed data into the data source, and simultaneously, a data abstract block is generated and added into a data abstract chain;
and (3) a data sharing process: the data user firstly obtains a public and private key pair for obtaining data, then searches for the required data in a data abstract chain, if the required data is found, signs the abstract information and the public key information and submits the data abstract information and the public key information of the data user to a data owner, the data owner encrypts the data requested to be shared by the received public key and copies the data to a data sharing pool, the data user obtains the corresponding shared data in the data sharing pool by using a private key after receiving the notification,
the data sharing pool generates a data sharing block according to the data sharing information, and the block is added into the data sharing chain.
The signature checking and auditing process in the data providing process is as follows: submitting to an organization Admin for signature verification and audit, organizing Admin signature after passing, then submitting to a system Admin for signature verification and audit again, and signing by the system Admin after passing;
the signature verification process in the data sharing process comprises the following steps: firstly submitting the data to an organization Admin of a group where a data user is located for signature verification, signing the data through the organization Admin, submitting the signed data to the organization Admin of the group where the data owner is located, and after the signature verification is passed, informing the data owner through the organization Admin of the data owner and sending a public key of the data user to the data owner.
The information sharing system Admin creates an organization and creates an organization Admin; applying for joining the organization by the member, and managing the members of the organization applying for joining by the organization Admin; if the data owner or data user is an organization, the corresponding functional process of the data owner or data user is executed by the organization Admin in the data providing process or data sharing process.
The invention has the beneficial effects that: the invention constructs a data sharing system based on a block chain technology, two block chains are constructed through the system, the encryption and the tracing of the storage process and the sharing process of data can be realized, the storage of the data is managed by utilizing the summary chain, the validity and the credibility of the stored data are ensured, the transmission process of the data is managed by utilizing the sharing chain, the process of each circulation of the data is recorded in the sharing chain, the providing process and the sharing process of the data are completely approved and signed, and each step can be traced. The cooperation and consistency of cross-department information are ensured, and both sides of data transmission can trust each other. The data safety is ensured, and the use of the data can be traced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a diagram of a data abstract chain structure of the present invention
FIG. 3 is a diagram of a data sharing chain structure according to the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a system and method for sharing information based on block chains includes an organization, a data source, a data summary chain, a data sharing pool, and a data sharing chain; the invention discloses a block chain technology in the prior art adopted by a data abstract chain and a data sharing chain, and the invention of the application is not based on which block chain technology is adopted, but how to solve the problem that the data sharing process is not traceable by utilizing the block chain technology.
The tissue comprises Admin, a tissue member; the organization members and organizations can be data providers, data owners or data users, the data providers can be data owners, and the creation, modification, deletion and other operations of the organizations are operated by a system Admin of the information sharing system;
the members of the organization are managed by Admin of the group to which they belong.
The data source stores data of an organization or organization members, and the data in the data source is encrypted by a data owner;
the summary chain comprises summary blocks corresponding to data summaries in the data source;
the block structure in the abstract chain comprises three parts, namely Head, body and Signature;
the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is a Hash value of a previous block of the block, and the Hash is a Hash value of a current block; if the current block is a creature block, the PreHash is null; num is the number of records of the data summary in the current block;
the Body contains Num data summary records, and the summary records include: the method comprises the steps of obtaining a summary ID, an owner of data information, a group to which the owner of the data information belongs, summary information of data, a Hash of the data, a timestamp, a signature of the owner of the data and a signature of the group to which the owner of the data belongs;
the signature of the group to which the data owner belongs is completed by Admin of the corresponding group to which the data owner belongs;
the system signature is completed by an information sharing system Admin;
and the Signature is a Signature carried out by the information sharing system Admin.
The data sharing pool comprises encrypted data used by an organization or organization members for sharing;
and the data sharing pool timely cleans the data with overdue sharing according to the timeliness of the shared data.
The data sharing chain comprises blocks for recording characteristics of data providers, users, data sharing timeliness and the like in the data sharing pool.
The block structure in the sharing chain comprises three parts, namely Head, body and Signature;
the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is a Hash value of a previous block of the block, and the Hash is a Hash value of a current block; if the current block is a creature block, the PreHash is null; num is the number of records of the data summary in the current block;
the Body contains Num data sharing records, and the sharing records comprise: shared ID, data owner, group to which data owner belongs, data user, group to which data user belongs, data Hash, age of shared data, timestamp, data owner signature, group to which data owner belongs signature, system signature, etc.
The signature of the group to which the data owner belongs is completed by Admin of the corresponding group to which the data owner belongs;
the system signature is completed by an information sharing system Admin;
and the Signature is a Signature carried out by the information sharing system Admin.
The method is realized by relying on the information sharing system and specifically comprises the following steps:
(1) An information sharing system Admin creates organization;
(2) Applying for joining organization by members, and managing the members of the organization applying for joining by the organization Admin;
(3) If the member needs to provide data, the member submits the signed data to Admin of the organization to carry out signature verification and audit; if the audit is passed, admin represents that the organization signs the member data, and submits the signed data to the system Admin. The system Admin checks and audits the data submitted by the organization, signs the data if the audit is passed, adds the signed data into the data source, generates a data abstract block at the same time, and adds the data abstract block into a data abstract chain
(4) If the organization needs to provide data, the organization submits the data by Admin of the organization. Admin audits the data submitted by Admin, signs the data, and submits the data to the system Admin. The system Admin audits the data submitted by the organization, if the audit is passed, the data is added into the data source, and meanwhile, a data abstract block is generated and added into a data abstract chain.
(5) If a member in an organization needs certain data, firstly generating a public and private key pair for acquiring the data, then searching the required data from a data summary chain, and if the required data is searched, signing information such as an owner corresponding to the data, a group to which the owner belongs, a data hash, a public key of the acquired data and the like, and then submitting the signed information to Admin of the group to which the owner belongs.
Admin checks the signature firstly according to the information submitted by the members, finds the group where the shared data provider is located after the signature passes, signs the information such as the owner corresponding to the data, the data hash, the public key of the data user and the like, then submits the signature information to Admin of the group where the data provider is located, verifies the signature firstly by Admin of the group where the data provider is located, and then informs the data owner and sends the public key of the data user to the data owner according to the received information. The data owner copies the data requested to be shared to the data sharing pool after encrypting the data with the received public key. If the data owner is an organization, admin for that organization completes the transaction. And after the data copy is finished, informing the Admin of the group, informing the Admin of the data user again by the Admin of the group of the data owner, and informing the data user by the Admin of the group of the data user. After the data user receives the notification, the corresponding shared data in the data sharing pool can be obtained by using the private key.
(6) If the organization needs certain data, it is done by Admin on behalf of the organization. Firstly, generating a public and private key pair for acquiring data, then searching the required data from a data abstract chain by Admin, signing information such as an owner, a group to which the owner belongs, a data hash, a public key of the acquired data and the like corresponding to the data if the required data is searched, and then submitting the signed information to Admin of a group to which a data provider belongs, wherein the Admin of the group to which the data provider belongs firstly verifies the signature, and then notifying the data owner according to the received information and sending the public key of a data user to the data owner. The data owner copies the data requested to be shared to the data sharing pool after encrypting the data with the received public key. If the data owner is an organization, it is done by Admin for that organization. After the data copy is completed, the Admin of the group is notified. Admin of the group in which the data owner resides informs the organization using the data Admin. Admin informs the members of the group where Admin is located, and sends the data sharing private key to the members of the group in an encryption mode. The member can obtain corresponding data from the sharing pool according to the private key distributed by the group Admin.
(7) The data sharing pool generates a data sharing block according to the data sharing information, and the block is added into the data sharing chain.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A blockchain-based information sharing system, comprising: organization, data source, data abstract chain, data sharing pool and data sharing chain; the organization or the members thereof can provide data to the data source, and the process of providing the data forms a block structure to be added into the data summary chain; the organization or the members thereof can acquire data from the data sharing pool, and the process of acquiring the data forms a block structure and is added into the data sharing chain;
the data providing process comprises the following steps: the data owner signs the data and submits the data to the information sharing system for signature verification and audit, the system signs the signed data after the signature verification and audit is passed and adds the signed data into the data source, and simultaneously, a data abstract block is generated and added into a data abstract chain;
a data sharing process: the data user firstly obtains a public and private key pair for obtaining data, then searches for the required data in a data abstract chain, if the required data is found, signs the abstract information and the public key information and submits the data abstract information and the public key information of the data user to a data owner, the data owner encrypts the data requested to be shared by the received public key and copies the data to a data sharing pool, the data user obtains the corresponding shared data in the data sharing pool by using a private key after receiving the notification,
the data sharing pool generates a data sharing block according to the data sharing information, and meanwhile, the block is added into a data sharing chain;
the signature checking and auditing process in the data providing process is as follows: submitting to an organization Admin for signature verification and audit, organizing Admin signature after passing, submitting to a system Admin for signature verification and audit again, and signing by the system Admin after passing;
the signature verification process in the data sharing process comprises the following steps: firstly submitting the data to an organization Admin of a group where a data user is located for signature verification, signing the data through the organization Admin, submitting the signed data to the organization Admin of the group where the data owner is located, and after the signature verification is passed, informing the data owner through the organization Admin of the data owner and sending a public key of the data user to the data owner.
2. The blockchain-based information sharing system according to claim 1, wherein the data source stores data of all organizations or members, and the data in the data source is encrypted by the data owner.
3. The blockchain-based information sharing system according to claim 1, wherein the data sharing pool includes encrypted data used by an organization or organization members for sharing, and the data sharing pool cleans up the data with expired sharing in time according to timeliness of the shared data.
4. The blockchain-based information sharing system according to claim 1, wherein: an administrator of the information sharing system becomes a system Admin, the system Admin can create, change and delete organizations, and each organization comprises members with two rights: group Admin and other members.
5. The blockchain-based information sharing system according to claim 1, wherein: the block structure of the data abstract chain comprises three parts, namely head, body and Signature; the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is a Hash value of a previous block of the block, and the Hash is a Hash value of a current block; num is the number of records of the data summary in the current block; the Body contains Num data summary records, and the Signature is a Signature performed by the information sharing system Admin.
6. The system according to claim 5, wherein if the current macroblock is a created macroblock, the PreHash is null; the data summary record comprises: the method comprises the steps of obtaining a summary ID, an owner of data information, a group to which the owner of the data information belongs, summary information of data, a Hash of the data, a timestamp, a signature of the owner of the data and a signature of the group to which the owner of the data belongs; the Signature of the group to which the data owner belongs is completed by Admin of the corresponding organization to which the data owner belongs, and the Signature is completed by Admin of an information sharing system.
7. The system according to claim 1, wherein the block structure in the data sharing chain comprises three parts, head, body and Signature;
the Head comprises a block ID, a PreHash, a Hash and a Num, wherein the PreHash is the Hash of a previous block of the block, and the Hash is the Hash of a current block; if the current block is a created block, the PreHash is null; num is the number of records of the data summary in the current block;
the Body contains Num data sharing records, and the sharing records comprise: sharing ID, data owner belonging group, data user belonging group, data Hash, shared data aging, time stamp, data owner signature, data owner belonging group signature and system signature;
the signature of the group to which the data owner belongs is completed by the group Admin of the corresponding organization to which the data owner belongs;
the system signature is completed by an information sharing system Admin;
the Signature is a Signature performed by the information sharing system Admin.
8. The blockchain-based information sharing system according to claim 1, wherein: an information sharing system Admin creates an organization and creates an organization Admin; applying for joining organization by members, and managing the members of the organization applying for joining by the organization Admin; if the data owner or data user is an organization, the corresponding functional process of the data owner or data user is executed by the organization Admin in the data providing process or data sharing process.
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| CN111061982B (en) * | 2019-12-11 | 2023-04-18 | 电子科技大学 | News information publishing and managing system based on block chain |
| CN111682934B (en) * | 2020-04-21 | 2023-08-01 | 国网天津市电力公司电力科学研究院 | Method and system for storing, accessing and sharing comprehensive energy metering data |
| CN112152812B (en) * | 2020-05-07 | 2021-05-25 | 北京天德科技有限公司 | File tracing and tamper-proof method based on cryptography |
| CN113205322A (en) * | 2021-06-08 | 2021-08-03 | 张晶 | Audit result data sharing method and system based on block chain |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506467A (en) * | 2016-10-31 | 2017-03-15 | 国云科技股份有限公司 | A kind of proof of identification recording method based on block chain |
| CN108765058A (en) * | 2018-04-28 | 2018-11-06 | 中国科学院信息工程研究所 | A kind of safe Synergistic method of manufacture link multiple entity based on block chain |
| CN109005036A (en) * | 2017-06-06 | 2018-12-14 | 北京握奇智能科技有限公司 | A kind of block chain member management method and system based on id password algorithm |
| CN109218391A (en) * | 2018-07-16 | 2019-01-15 | 哈尔滨工程大学 | A method of distributed memory system audit and decentralization based on block chain |
| CN109314636A (en) * | 2016-02-23 | 2019-02-05 | 区块链控股有限公司 | Cryptographic method and system for secure extraction of data from blockchains |
| CN109447603A (en) * | 2018-10-18 | 2019-03-08 | 中国船舶工业***工程研究院 | A kind of oceanographic data resource share method based on block chain |
| CN109858228A (en) * | 2019-01-31 | 2019-06-07 | 上海计算机软件技术开发中心 | Data sharing service platform and method based on block chain |
-
2019
- 2019-06-10 CN CN201910497262.6A patent/CN110298193B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314636A (en) * | 2016-02-23 | 2019-02-05 | 区块链控股有限公司 | Cryptographic method and system for secure extraction of data from blockchains |
| CN106506467A (en) * | 2016-10-31 | 2017-03-15 | 国云科技股份有限公司 | A kind of proof of identification recording method based on block chain |
| CN109005036A (en) * | 2017-06-06 | 2018-12-14 | 北京握奇智能科技有限公司 | A kind of block chain member management method and system based on id password algorithm |
| CN108765058A (en) * | 2018-04-28 | 2018-11-06 | 中国科学院信息工程研究所 | A kind of safe Synergistic method of manufacture link multiple entity based on block chain |
| CN109218391A (en) * | 2018-07-16 | 2019-01-15 | 哈尔滨工程大学 | A method of distributed memory system audit and decentralization based on block chain |
| CN109447603A (en) * | 2018-10-18 | 2019-03-08 | 中国船舶工业***工程研究院 | A kind of oceanographic data resource share method based on block chain |
| CN109858228A (en) * | 2019-01-31 | 2019-06-07 | 上海计算机软件技术开发中心 | Data sharing service platform and method based on block chain |
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