CN112966021A - Data traceability system based on block chain - Google Patents
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Abstract
The invention relates to data tracing, in particular to a data tracing system based on a block chain, which comprises a controller and a data sending request receiving module connected with the controller and used for receiving a data sending request, wherein the controller is connected with a data retrieving module used for retrieving data on the chain according to the data sending request, the data retrieving module is respectively connected with a first characteristic value acquiring module and a second characteristic value acquiring module used for extracting a first characteristic value and a second characteristic value from the data on the chain, the controller is respectively connected with a characteristic watermark generating module and a hash mapping module used for generating a characteristic watermark and verifying hash according to the first characteristic value and the second characteristic value, and the controller is connected with a data processing module used for processing the characteristic watermark and the verification hash and the data on the chain; the technical scheme provided by the invention can effectively overcome the defects of low data tracing efficiency and incapability of accurately positioning links with data modification in the prior art.
Description
Technical Field
The invention relates to data tracing, in particular to a data tracing system based on a block chain.
Background
The Block Chain technology (Block Chain) refers to a technical scheme for collectively maintaining a reliable database in a decentralized mode, the technical scheme mainly relates blocks (blocks) through a cryptography method, each Block contains all data information of a system within a certain time, and a digital signature is generated to verify the validity of the information, and meanwhile, the blocks are linked to the next data Block to form a main Chain. Wherein a block is a record in a block chain that contains and confirms a transaction to be processed.
With the great influence of big data on human life, work and other aspects, personal data has become a treasure with great value, and when the value of the personal data is explored, the personal data can continuously create value in various ways. At the same time, the frequent financial transaction activities can also put personal data at any time in danger of leakage or even tampering. Therefore, how to solve the difficult problem of protecting personal data in the context of big data and balance the relationship between personal data protection and data value utilization has attracted extensive attention in the industry.
Currently, the most prominent problem of block chains in the application process is that the chain throughput is too low, the transaction delay is long, the real-time uplink of the transaction cannot be achieved, and the data volume will increase continuously as time advances. On the basis, as for the block chain for storing the tracing data, as time advances, the amount of the tracing data increases, so that the operating efficiency of the tracing intelligent contract for processing the tracing data on the block chain is reduced, and the tracing accuracy is reduced, so that the link where the data is modified cannot be accurately found. Therefore, it is difficult to ensure that the user can query the data tracing result from the chain in time.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides a data traceability system based on a block chain, which can effectively overcome the defects that the data traceability efficiency is low and the links with data modification can not be accurately positioned in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a data tracing system based on a block chain comprises a controller and a data sending request receiving module connected with the controller and used for receiving a data sending request, the controller is connected with a data calling module used for calling data on the chain according to the data sending request, the data calling module is respectively connected with a first characteristic value acquisition module and a second characteristic value acquisition module which are used for extracting a first characteristic value and a second characteristic value from the data on the chain, the controller is respectively connected with a characteristic watermark generating module and a Hash mapping module which are used for generating a characteristic watermark and verifying Hash according to the first characteristic value and the second characteristic value, the controller is connected with a data processing module for processing the characteristic watermark, the verification hash and the data on the chain, the controller is connected with a data sending module used for sending the processed data to a target position according to a data sending request;
the controller is connected with a local data state recording module used for recording the local data state of the data on the link, the controller is connected with a data comparison module used for comparing the verification hash, the controller is connected with a watermark identification module used for identifying the characteristic watermark, the data comparison module and the watermark identification module are connected with a data operation recording module used for judging the data modification operation according to the comparison result and the identification result, and the local data state recording module and the data operation recording module are connected with a data operation query series module used for retrieving the local data state and the data modification operation judgment result and performing data tracing.
Preferably, the system further comprises a data validity judging module connected with the controller and used for judging validity of the data on the chain, the validity judging module compares the data on the chain with preset data, judges validity of the data called from the chain according to a comparison result, and carries out validity rating.
Preferably, when the validity judging module judges that the data called from the chain has validity according to the comparison result, the controller controls the first characteristic value obtaining module and the second characteristic value obtaining module to respectively extract a first characteristic value and a second characteristic value from the data called from the chain; otherwise, the controller controls the data calling module to call the data on the chain again according to the data sending request.
Preferably, the first characteristic value obtaining module obtains account data including account security information, credit rating information and account amount flow information from the chain calling data, and screens out information data with the highest priority from the account data according to a priority order to serve as the first characteristic value;
and the second characteristic value acquisition module acquires attribute data including account use time and effectiveness rating from the chain calling data and takes the attribute data as a second characteristic value.
Preferably, the data processing module covers the feature watermark on the data on the chain of the continuous bytes at the designated position, and sends the data on the chain covering the feature watermark and the verification hash to the data sending module after performing packaging processing on the data and the verification hash.
Preferably, the local data state recording module extracts the information of the data receiver from the data sending request, and records the local data sender and the local data modification operation.
Preferably, the controller is connected to a source tracing query module for receiving a data source tracing query request, and when the controller receives the data source tracing query request, the controller controls the data comparison module and the watermark identification module to operate.
Preferably, when the controller controls the data comparison module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from the received data on the link, the hash mapping module generates a verification hash according to the first characteristic value and the second characteristic value, and the data comparison module compares the generated verification hash with an original verification hash;
when the controller controls the watermark identification module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from received chain data, the characteristic watermark generation module generates a characteristic watermark according to the first characteristic value and the second characteristic value, and the watermark identification module compares the generated characteristic watermark with an original characteristic watermark.
Preferably, the data operation query tandem module retrieves a local data modification operation in a local data state and a data modification operation judgment result obtained by the data operation recording module, analyzes the data modification operation to obtain a data modification operation positioning result, and the controller returns the data modification operation positioning result through the source tracing query module.
(III) advantageous effects
Compared with the prior art, the data traceability system based on the block chain can utilize the characteristic watermark and the verification hash to realize high-efficiency traceability of data, record the local data state of the data on the chain by utilizing the local data state recording module, judge the data modification operation by utilizing the data operation recording module, and simultaneously call the local data state and the data modification operation judgment result to carry out data modification operation positioning by utilizing the data operation inquiry serial module, so that the accuracy of positioning of the data modification operation link can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
A block chain-based data tracing system is shown in figure 1 and comprises a controller and a data sending request receiving module connected with the controller and used for receiving a data sending request, wherein the controller is connected with a data retrieving module used for retrieving data on a chain according to the data sending request, the data retrieving module is respectively connected with a first characteristic value obtaining module and a second characteristic value obtaining module used for extracting a first characteristic value and a second characteristic value from the data on the chain, the controller is respectively connected with a first characteristic value and a second characteristic value generating a characteristic watermark, the controller is connected with a data processing module which is used for carrying out data processing on the characteristic watermark, the verification hash and the linked data, and the controller is connected with a data sending module which is used for sending the processed data to a target position according to a data sending request.
The chain data validity judging module is connected with the controller and used for judging the validity of the chain data, the chain data are compared with preset data through the validity judging module, the validity of the chain data to be called is judged according to a comparison result, and validity grading is carried out.
When the validity judging module judges that the called data on the chain has validity according to the comparison result, the controller controls the first characteristic value obtaining module and the second characteristic value obtaining module to respectively extract a first characteristic value and a second characteristic value from the data on the chain; otherwise, the controller controls the data calling module to call the data on the chain again according to the data sending request.
The first characteristic value acquisition module acquires account data comprising account safety information, credit rating information and account amount flow information from the chain calling data, and screens out information data with the highest priority from the account data according to a priority sequence to serve as a first characteristic value;
and the second characteristic value acquisition module acquires attribute data including account use time and effectiveness rating from the chain calling data as a second characteristic value.
The data processing module covers the feature watermark on the data on the chain of the continuous bytes at the specified position, packs the data on the chain covered with the feature watermark and the verification hash, and then sends the data to the data sending module.
According to the technical scheme, the first characteristic value and the second characteristic value are extracted from the data on the link, the characteristic watermark and the verification hash are generated according to the first characteristic value and the second characteristic value respectively, the data modification behavior in the data transmission process on the link is monitored, and effective tracing to the data can be achieved according to the characteristic watermark and the verification hash.
The controller is connected with a local data state recording module used for recording the local data state of the data on the link, the controller is connected with a data comparison module used for comparing the verification hash, the controller is connected with a watermark identification module used for identifying the characteristic watermark, the data comparison module and the watermark identification module are connected with a data operation recording module used for judging the data modification operation according to the comparison result and the identification result, and the local data state recording module and the data operation recording module are connected with a data operation query series module used for calling the local data state and the data modification operation judgment result and carrying out data tracing.
And the local data state recording module extracts the information of the data receiver from the data sending request and records the local data sending party and the local data modification operation.
The technical scheme of the application can be used for data transmission among blocks in a block chain and data transmission among chains to trace and trace data. The controller is connected with a tracing query module for receiving the data tracing query request, and when the controller receives the data tracing query request, the controller controls the data comparison module and the watermark identification module to work.
When the controller controls the data comparison module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from received chain data, the hash mapping module generates a verification hash according to the first characteristic value and the second characteristic value, and the data comparison module compares the generated verification hash with an original verification hash;
when the controller controls the watermark identification module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from received chain data, the characteristic watermark generation module generates a characteristic watermark according to the first characteristic value and the second characteristic value, and the watermark identification module compares the generated characteristic watermark with an original characteristic watermark.
The data operation query tandem module calls local data modification operation in a local data state and data modification operation judgment results obtained by the data operation recording module, analyzes the data modification operation to obtain data modification operation positioning results, and the controller returns the data modification operation positioning results through the source tracing query module.
According to the technical scheme, the local data state and the data modification operation judgment result are called through the data operation query serial module to perform data modification operation positioning, so that the accuracy of positioning of a data modification operation link can be improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A data traceability system based on a block chain is characterized in that: comprises a controller and a data sending request receiving module connected with the controller and used for receiving a data sending request, the controller is connected with a data calling module used for calling data on the chain according to the data sending request, the data calling module is respectively connected with a first characteristic value acquisition module and a second characteristic value acquisition module which are used for extracting a first characteristic value and a second characteristic value from the data on the chain, the controller is respectively connected with a characteristic watermark generating module and a Hash mapping module which are used for generating a characteristic watermark and verifying Hash according to the first characteristic value and the second characteristic value, the controller is connected with a data processing module for processing the characteristic watermark, the verification hash and the data on the chain, the controller is connected with a data sending module used for sending the processed data to a target position according to a data sending request;
the controller is connected with a local data state recording module used for recording the local data state of the data on the link, the controller is connected with a data comparison module used for comparing the verification hash, the controller is connected with a watermark identification module used for identifying the characteristic watermark, the data comparison module and the watermark identification module are connected with a data operation recording module used for judging the data modification operation according to the comparison result and the identification result, and the local data state recording module and the data operation recording module are connected with a data operation query series module used for retrieving the local data state and the data modification operation judgment result and performing data tracing.
2. The blockchain-based data tracing system of claim 1, wherein: the chain data validity judging module is connected with the controller and used for judging the validity of the chain data, the chain data are compared with preset data by the validity judging module, the validity of the chain data is judged according to a comparison result, and validity grading is carried out.
3. The blockchain-based data tracing system of claim 2, wherein: when the validity judging module judges that the called data on the chain has validity according to the comparison result, the controller controls the first characteristic value obtaining module and the second characteristic value obtaining module to respectively extract a first characteristic value and a second characteristic value from the data on the chain; otherwise, the controller controls the data calling module to call the data on the chain again according to the data sending request.
4. The blockchain-based data tracing system of claim 3, wherein: the first characteristic value acquisition module acquires account data comprising account safety information, credit rating information and account amount flow information from the chain calling data, and screens out information data with the highest priority from the account data according to a priority sequence to serve as a first characteristic value;
and the second characteristic value acquisition module acquires attribute data including account use time and effectiveness rating from the chain calling data and takes the attribute data as a second characteristic value.
5. The blockchain-based data tracing system of claim 4, wherein: the data processing module covers the feature watermark on the chain data of the continuous bytes at the designated position, packs the chain data covered with the feature watermark and the verification hash, and then sends the data to the data sending module.
6. The blockchain-based data tracing system of claim 5, wherein: and the local data state recording module extracts the information of the data receiver from the data sending request and records the local data sending party and the local data modification operation.
7. The blockchain-based data tracing system of claim 6, wherein: the controller is connected with a traceability query module used for receiving a data traceability query request, and when the controller receives the data traceability query request, the controller controls the data comparison module and the watermark identification module to work.
8. The blockchain-based data tracing system of claim 7, wherein: when the controller controls the data comparison module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from received chain data, the hash mapping module generates a verification hash according to the first characteristic value and the second characteristic value, and the data comparison module compares the generated verification hash with an original verification hash;
when the controller controls the watermark identification module to work, the first characteristic value acquisition module and the second characteristic value acquisition module respectively extract a first characteristic value and a second characteristic value from received chain data, the characteristic watermark generation module generates a characteristic watermark according to the first characteristic value and the second characteristic value, and the watermark identification module compares the generated characteristic watermark with an original characteristic watermark.
9. The blockchain-based data tracing system of claim 8, wherein: the data operation query tandem module calls local data modification operation in a local data state and data modification operation judgment results obtained by the data operation recording module, analyzes the data modification operation to obtain data modification operation positioning results, and the controller returns the data modification operation positioning results through the source tracing query module.
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