CN111797142A - Method and system for auditing data on link - Google Patents
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Abstract
The invention provides a method and a system for auditing data on a chain, which return data on the chain together with a unique index to a data requester, the data requester saves the unique index and the returned data to a block chain account book through an intelligent contract, when the data returned on the chain needs to be audited, the auditor inquires the data stored in the block chain account book of the data requester and the data stored in the block chain account book of a data responder through the unique index, and then compares the data recorded by the requester with the data sent by the data responder so as to verify the credibility of the data, thereby solving the problem that credibility audit can not be carried out between interaction of a block chain prepositive system and the chain in the prior art.
Description
Technical Field
The invention relates to the field of block chain data auditing, in particular to a chain data auditing method and system.
Background
An intelligent contract is a computer protocol intended to propagate, validate or execute contracts in an informational manner. Smart contracts allow trusted transactions to be conducted without third parties, which transactions are traceable and irreversible.
The block chain bottom layer data query mechanism is a block query, and cannot provide real-time query of data. In order to solve the problem of real-time query of blockchain data, the prior art generally introduces a blockchain preamble. However, after introducing the blockchain preamble, because the blockchain preamble and the blockchain are two parallel systems, there is a problem that the transmission of data between the two is not reliable. Moreover, after the block chain is introduced, credibility audit cannot be performed between the block chain pre-positioning system and the chain interaction due to the existence of an unreliable problem.
Therefore, how to solve the problem of credibility audit between the block chain pre-system and the chain interaction is a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a chain data auditing method and system, which aim to solve the problem that credibility auditing cannot be carried out between a block chain preposed system and chain interaction in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
an on-chain data auditing method, comprising:
acquiring a data query contract stored in a block chain account book and a signature corresponding to a data request sent by a data requester currently; the data query contract comprises: the signature of the data request sent by the data requester and the unique index of the data request; the unique index is a tag of data stored in the blockchain ledger by the data responder;
verifying the legality of the data requester according to the signature corresponding to the data request currently sent by the data requester and the data query contract;
after the verification is passed, calling the data stored on the block chain account book by the data responder according to the data request currently sent by the data requester and the unique index;
feeding the called data back to the data requester, and storing the called data on the block chain book according to the unique index;
when an auditing party audits the data called by the data requesting party, the data called by the data requesting party and the data stored in the block chain ledger by the data responding party are respectively called according to the unique index, and the called data and the data stored in the block chain ledger by the data responding party are compared to verify the credibility of the data fed back to the data requesting party by the data responding party.
Preferably, the method further comprises the following steps: adopting a block chain to generate a log record contract of data interaction between the data requester and the data responder in a preposition manner; the logging contract comprises: a query record and the unique index.
Preferably, the method further comprises the following steps: and calling a data query contract in the block chain account book by adopting a block chain preposition according to the data query request.
Preferably, the method further comprises the following steps:
verifying whether the transaction signature of the data requester is legal; if the signature is legal, acquiring the signature corresponding to the data request sent by the data requester currently; otherwise, closing the data request of the data requester.
An on-chain data auditing system, comprising:
the acquisition module is used for acquiring a data query contract stored in the block chain account book and a signature corresponding to a data request sent by a data requester currently; the data query contract comprises: the signature of the data request sent by the data requester and the unique index of the data request; the unique index is a tag of data stored in the blockchain ledger by the data responder;
the verification module is used for verifying the validity of the data requester according to the signature corresponding to the data request currently sent by the data requester and the data query contract;
the data calling module is used for calling the data stored on the block chain account book by the data responder according to the data request currently sent by the data requester and the unique index after the verification is passed;
the data storage module is used for feeding the called data back to the data requester and storing the called data on the block chain account book according to the unique index;
and the auditing module is used for respectively calling the data called by the data requesting party and the data stored in the block chain account book by the data responding party according to the unique index when the auditing party checks the data called by the data requesting party, and comparing the called data and the data stored in the block chain account book by the data responding party so as to verify the credibility of the data fed back to the data requesting party by the data responding party.
Preferably, the method further comprises the following steps:
the log contract generating module is used for generating a log contract of data interaction between the data requester and the data responder by adopting a block chain preposition; the logging contract comprises: a query record and the unique index.
Preferably, the method further comprises the following steps:
and the data query contract calling module is used for calling the data query contract in the block chain account book by adopting a block chain preposition according to the data query request.
Preferably, the method further comprises the following steps:
the validity verifying module is used for verifying whether the transaction signature of the data requester is legal or not; if the signature is legal, acquiring the signature corresponding to the data request sent by the data requester currently; otherwise, closing the data request of the data requester.
An on-chain data auditing system, comprising: the system comprises a data request module, a block chain preposition module, a data response module, a block chain storage module and an auditing module;
the data request module is connected with the block chain preposition module; the block chain preposition module is connected with the block chain storage module; the block chain storage module is respectively connected with the data request module, the data response module and the auditing module;
the block chain storage module stores a data query contract and data of a data responder; the data query contract comprises a signature of a data request sent by a data requester and a unique index of the data request;
after the data request module sends out a data request, the block chain front-end module verifies the validity of the data request sent out by the data request module according to the signature in the data query contract; if the data is legal, the block chain front-end module calls the data stored on the block chain account book by the data response module according to the unique index, and feeds the called data back to the data request module by taking the unique index as a label, and the data request module stores the data by taking the unique index as the label in the block chain storage module; the block chain preposition module records a query log so as to store the certificate of the whole data interaction process; the block chain pre-module stores the query log on the block chain storage module;
when an auditing party needs to audit the called data, the auditing module respectively calls the data called by the data requesting party and the data stored in the block chain account book by the data responding party according to the unique index and compares the two data so as to verify the credibility of the data fed back to the data requesting party by the data responding party.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a method and a system for auditing data on a chain, which return data on the chain together with a unique index to a data requester, the data requester saves the unique index and the returned data to a block chain account book through an intelligent contract, when the data returned on the chain needs to be audited, the auditor inquires the data stored in the block chain account book of the data requester and the data stored in the block chain account book of a data responder through the unique index, and then compares the data recorded by the requester with the data sent by the data responder so as to verify the credibility of the data, thereby solving the problem that credibility audit can not be carried out between interaction of a block chain prepositive system and the chain in the prior art.
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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 flow chart of a method for auditing data on a chain according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a chain data auditing system provided by the present invention;
FIG. 3 is a schematic diagram of another embodiment of an on-chain data auditing system according to the present invention;
fig. 4 is a diagram of a data transmission framework according to an embodiment of 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 chain data auditing method and system, which aim to solve the problem that credibility auditing cannot be carried out between a block chain preposed system and chain interaction in the prior art.
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.
Fig. 1 is a flowchart of an on-chain data auditing method according to an embodiment of the present invention, and as shown in fig. 1, an on-chain data auditing method includes:
step 100: and acquiring a data query contract stored in the block chain account book and a signature corresponding to a data request currently sent by a data requester. The data query contract comprises: a signature of a data request issued by a data requestor and a unique index of the data request. The unique index is a tag of data stored in the blockchain ledger by the data responder.
Step 101: and verifying the legality of the data requester according to the signature corresponding to the data request currently sent by the data requester and the data query contract.
Step 102: and after the verification is passed, calling the data stored on the block chain account book by the data responder according to the data request currently sent by the data requester and the unique index.
Step 103: and feeding back the called data to the data requester, and storing the called data on the block chain book according to the unique index.
Step 104: when an auditing party audits the data called by the data requesting party, the data called by the data requesting party and the data stored in the block chain ledger by the data responding party are respectively called according to the unique index, and the called data and the data stored in the block chain ledger by the data responding party are compared to verify the credibility of the data fed back to the data requesting party by the data responding party.
In order to record the data transaction in the whole process, the chain data auditing method provided by the invention can further comprise the following steps: and adopting a block chain to generate a logging contract of data interaction between the data requester and the data responder in a preposition mode. The logging contract comprises: a query record and the unique index.
In the above-provided method for auditing data on a chain, the method may further include: and calling a data query contract in the block chain account book by adopting a block chain preposition according to the data query request so that a data requester can complete data query according to the data query contract.
Further, to avoid illegal access to the data, the method for auditing the data on the chain provided by the invention may further include:
and verifying whether the transaction signature of the data requester is legal. And if the signature is legal, acquiring the signature corresponding to the data request currently sent by the data requester. Otherwise, closing the data request of the data requester.
For the above-mentioned method for auditing data on a chain, the present invention also provides a system for auditing data on a chain, as shown in fig. 2, the system for auditing data on a chain includes: the system comprises an acquisition module 200, a verification module 201, a data calling module 202, a data storage module 203 and an auditing module 204.
The obtaining module 200 is configured to obtain a data query contract stored in a blockchain ledger and a signature corresponding to a data request currently sent by a data requester. The data query contract comprises: a signature of a data request issued by a data requestor and a unique index of the data request. The unique index is a tag of data stored in the blockchain ledger by the data responder.
The verification module 201 is configured to verify the validity of the data requestor according to the signature corresponding to the data request currently sent by the data requestor and the data query contract.
The data retrieving module 202 is configured to retrieve, after the verification is passed, data stored on the block chain ledger by the data responder according to the data request currently sent by the data requester and the unique index.
The data storage module 203 is configured to feed back the retrieved data to the data requestor, and store the retrieved data on the blockchain ledger according to the unique index.
The auditing module 204 is configured to, when an auditing party audits data called by the data requesting party, respectively call the data called by the data requesting party and the data stored in the blockchain ledger by the data responding party according to the unique index, and compare the called data and the data stored in the blockchain ledger by the data responding party, so as to verify the credibility of the data fed back to the data requesting party by the data responding party.
As a preferred embodiment of the present invention, the system for auditing data on a chain provided by the present invention may further include: and a log contract generation module. The logging contract generation module is used for generating a logging contract of data interaction between the data requester and the data responder by adopting a block chain preposition. The logging contract comprises: a query record and the unique index.
As another preferred embodiment of the present invention, the system for auditing data on a chain provided by the present invention may further include: and a data query contract calling module. The data query contract calling module is used for calling a data query contract in the block chain account book by adopting a block chain preposition according to the data query request.
As another preferred embodiment of the present invention, the system for auditing data on a chain provided by the present invention may further include: and a validity verifying module. The validity verifying module is used for verifying whether the transaction signature of the data requester is legal or not. And if the signature is legal, acquiring the signature corresponding to the data request currently sent by the data requester. Otherwise, closing the data request of the data requester.
In addition, as shown in fig. 3, another system for auditing data on a chain provided by the present invention includes: a data request module 300, a blockchain pre-header module 301, a data response module 302, a blockchain storage module 303, and an audit module 304.
The data request module 300 is connected to the blockchain pre-staging module 301. The blockchain pre-module 301 is connected to the blockchain storage module 303. The blockchain storage module 303 is respectively connected to the data request module 300, the data response module 302 and the audit module 304.
The blockchain storage module 303 stores data query contracts and data of data responders. The data query contract comprises a signature of a data request issued by a data requestor and a unique index of the data request.
After the data request module 300 sends a data request, the block chain pre-posed module 301 verifies the validity of the data request sent by the data request module 300 according to the signature in the data query contract. If the index is legal, the blockchain prefix module 301 retrieves the data stored on the blockchain book by the data responder through the data response module 302 according to the unique index, and feeds back the retrieved data to the data request module 300 by using the unique index as a tag, and the data request module 300 stores the data by using the unique index as a tag in the blockchain storage module 303. The block chain pre-posed module 301 records a query log to store the evidence of the whole data interaction process. The blockchain pre-staging module 301 stores the query log on the blockchain storage module 303.
When an auditor needs to audit the called data, the auditing module 304 respectively calls the data called by the data requesting party and the data stored in the block chain ledger by the data responding party according to the unique index, and compares the two data to verify the credibility of the data fed back to the data requesting party by the data responding party.
In this embodiment, the number of the block chain accounts is one or two. When the number of the block chains is one, the block chain account book is arranged on the block chain for data interaction between the data requester and the data responder. When the number of the blockchain accounts is two, one blockchain account (a first blockchain account) is set on the blockchain of the data requester, and the other blockchain account (a second blockchain account) is set on the blockchain of the data responder. The following example will illustrate the scheme of the present invention by taking the number of blockchain accounts as two (as shown in fig. 4).
Based on the data transmission framework between the data requester and the data responder shown in fig. 4, based on the above-mentioned method and system for auditing data on a chain provided by the present invention, the auditing method includes the following four steps:
the method comprises the following steps: and verifying the transaction signature of the data requester so as to verify the identity of the data requester. The data requestor initiates a data request and signs the data request to prove that the data request was initiated by the data requestor on its own initiative. At the same time, a unique index of the requested data is generated for preservation and auditing. And the block chain is prepositive to verify the signature of the data requester and determine the data query authority.
Step two: after the identity passes, the block chain front-end calls a data query contract on a second block chain account book according to the data query request. A data query contract includes two parts, a status query contract and a logging contract.
The state query contract is used for querying a state database of the block chain, returning a queried state value and recording a unique index. The logging contract is used for recording query logs and unique indexes. The records of the data query contract and the log record contract can be provided for an auditor to audit in a mode of providing a query interface on a chain.
The block chain preposition returns data on the credible chain to the data requester.
Step three: the block chain preamble returns the on-chain return data to the data requestor along with the unique index. The data requester saves the unique index together with the returned data on the first blockchain through an intelligent contract. And in the data interaction process of the data requester and the data responder, the block chain is preposed with a request log for storing the data requester, the interactive process is subjected to evidence storage, and audit data of accounts of both parties is provided for the auditor by combining the evidence returned by the data requester for the request.
Step four: when the data returned on the chain needs to be checked (for example, when the data requester calls into question about the credibility of the data on the chain), the auditor queries the first block chain ledger and the second block chain ledger through the unique index, and compares the data recorded by the requester with the data sent by the data responder to verify the credibility of the data.
In conclusion, the technical scheme of the invention can solve the problem that data between a data requester and a data responder is not credible because the block chain is preposed and the block chain is two parallel systems. And each important record between the two can be audited through the technical scheme provided by the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
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 (9)
1. An on-chain data auditing method, comprising:
acquiring a data query contract stored in a block chain account book and a signature corresponding to a data request sent by a data requester currently; the data query contract comprises: the signature of the data request sent by the data requester and the unique index of the data request; the unique index is a tag of data stored in the blockchain ledger by the data responder;
verifying the legality of the data requester according to the signature corresponding to the data request currently sent by the data requester and the data query contract;
after the verification is passed, calling the data stored on the block chain account book by the data responder according to the data request currently sent by the data requester and the unique index;
feeding the called data back to the data requester, and storing the called data on the block chain book according to the unique index;
when an auditing party audits the data called by the data requesting party, the data called by the data requesting party and the data stored in the block chain ledger by the data responding party are respectively called according to the unique index, and the called data and the data stored in the block chain ledger by the data responding party are compared to verify the credibility of the data fed back to the data requesting party by the data responding party.
2. The on-chain data auditing method of claim 1 further comprising: adopting a block chain to generate a log record contract of data interaction between the data requester and the data responder in a preposition manner; the logging contract comprises: a query record and the unique index.
3. The on-chain data auditing method of claim 1 further comprising: and calling a data query contract in the block chain account book by adopting a block chain preposition according to the data query request.
4. The on-chain data auditing method of claim 1 further comprising:
verifying whether the transaction signature of the data requester is legal; if the signature is legal, acquiring the signature corresponding to the data request sent by the data requester currently; otherwise, closing the data request of the data requester.
5. An on-chain data auditing system, comprising:
the acquisition module is used for acquiring a data query contract stored in the block chain account book and a signature corresponding to a data request sent by a data requester currently; the data query contract comprises: the signature of the data request sent by the data requester and the unique index of the data request; the unique index is a tag of data stored in the blockchain ledger by the data responder;
the verification module is used for verifying the validity of the data requester according to the signature corresponding to the data request currently sent by the data requester and the data query contract;
the data calling module is used for calling the data stored on the block chain account book by the data responder according to the data request currently sent by the data requester and the unique index after the verification is passed;
the data storage module is used for feeding the called data back to the data requester and storing the called data on the block chain account book according to the unique index;
and the auditing module is used for respectively calling the data called by the data requesting party and the data stored in the block chain account book by the data responding party according to the unique index when the auditing party checks the data called by the data requesting party, and comparing the called data and the data stored in the block chain account book by the data responding party so as to verify the credibility of the data fed back to the data requesting party by the data responding party.
6. The on-chain data auditing system of claim 5, further comprising:
the log contract generating module is used for generating a log contract of data interaction between the data requester and the data responder by adopting a block chain preposition; the logging contract comprises: a query record and the unique index.
7. The on-chain data auditing system of claim 5, further comprising:
and the data query contract calling module is used for calling the data query contract in the block chain account book by adopting a block chain preposition according to the data query request.
8. The on-chain data auditing system of claim 5, further comprising:
the validity verifying module is used for verifying whether the transaction signature of the data requester is legal or not; if the signature is legal, acquiring the signature corresponding to the data request sent by the data requester currently; otherwise, closing the data request of the data requester.
9. An on-chain data auditing system, comprising: the system comprises a data request module, a block chain preposition module, a data response module, a block chain storage module and an auditing module;
the data request module is connected with the block chain preposition module; the block chain preposition module is connected with the block chain storage module; the block chain storage module is respectively connected with the data request module, the data response module and the auditing module;
the block chain storage module stores a data query contract and data of a data responder; the data query contract comprises a signature of a data request sent by a data requester and a unique index of the data request;
after the data request module sends out a data request, the block chain front-end module verifies the validity of the data request sent out by the data request module according to the signature in the data query contract; if the data is legal, the block chain front-end module calls the data stored on the block chain account book by the data response module according to the unique index, and feeds the called data back to the data request module by taking the unique index as a label, and the data request module stores the data by taking the unique index as the label in the block chain storage module; the block chain preposition module records a query log so as to store the certificate of the whole data interaction process; the block chain pre-module stores the query log on the block chain storage module;
when an auditing party needs to audit the called data, the auditing module calls the data taking the unique index as a label and the data stored on the block chain account book by the data responding party according to the unique index and compares the two data to verify the credibility of the data fed back to the data requesting party by the data responding party.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113111124A (en) * | 2021-03-24 | 2021-07-13 | 广州大学 | Block chain-based federal learning data auditing system and method |
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