CN109949035B - Block chain data privacy control method, device and system - Google Patents
Block chain data privacy control method, device and system Download PDFInfo
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Abstract
The invention provides a block chain data privacy control method, device and system. The block chain data privacy control method comprises the following steps: sending a data viewing request to a data encryption end; receiving single-item plaintext data from a data encryption end, and a block chain position index and a hash algorithm of signed data of the single-item plaintext data; sending a data acquisition request to a blockchain network; receiving a first hash value corresponding to single plaintext data from a block chain network; judging whether the single plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single plaintext data; when the single-item plaintext data is correct, the single-item plaintext data is output, so that data leakage can be avoided, and the privacy of the data is ensured.
Description
Technical Field
The invention relates to the technical field of block chain privacy control, in particular to a block chain data privacy control method, device and system.
Background
Since data is not tamperable on the blockchain, and blockchain data is typically backed up at multiple principals, the data owner may choose to store encrypted data only on the blockchain if privacy is to be guaranteed. Then the data they can view, whether it is a blockchain participant to the backup data or an unauthorized querier, is encrypted. However, if the data is encrypted, the data owner needs to inform the data viewer (i.e. the partner) of the content of the data due to business requirements. If the viewer is informed of the password for the encrypted data, the viewer may leak the password so that any unauthorized party can query the blockchain data and then decrypt the queried blockchain data using the password.
Disclosure of Invention
The embodiment of the invention mainly aims to provide a block chain data privacy control method, device and system to avoid data leakage and ensure data privacy.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling block chain data privacy, including:
sending a data viewing request to a data encryption end; wherein the data viewing request comprises a single plaintext data tag;
receiving single-item plaintext data from a data encryption end, and a block chain position index and a hash algorithm of signed data of the single-item plaintext data;
sending a data acquisition request to a blockchain network; the data acquisition request comprises a block chain position index of signed data of single plaintext data;
receiving a first hash value corresponding to single plaintext data from a block chain network;
judging whether the single plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single plaintext data;
and when the single-item plaintext data is correct, outputting the single-item plaintext data.
The embodiment of the invention also provides a block chain data privacy control method, which comprises the following steps:
receiving a data viewing request from a data viewing end;
extracting single plaintext data corresponding to the single plaintext data tag and a block chain position index of signed data of the single plaintext data according to the single plaintext data tag in the data checking request;
and sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to a data viewing end.
The embodiment of the invention also provides a block chain data privacy control method, which comprises the following steps:
receiving a data acquisition request from a data viewing end;
extracting a first hash value corresponding to a single plaintext data label according to a block chain position index of signed data of the single plaintext data in the data acquisition request;
and sending a first hash value corresponding to the single plaintext data label to the data viewing end.
The embodiment of the invention also provides a block chain data privacy control method, which comprises the following steps:
receiving service data, and splitting the service data into a plurality of single plaintext data;
calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number;
sending the hash algorithm and the single plaintext data to a data encryption end;
receiving a plurality of single-item encrypted data from a data encryption end;
signing endorsements of a plurality of single encrypted data;
generating signed data of each single item of plaintext data according to each single item of encrypted data subjected to signature endorsement and a first hash value corresponding to each single item of plaintext data;
and sending the signed data to the blockchain network.
The embodiment of the invention also provides a block chain data privacy control device, which is applied to a data viewing end and comprises the following steps:
the first sending unit is used for sending a data viewing request to the data encryption end; sending a data acquisition request to a blockchain network; the data checking request comprises a single plaintext data tag, and the data obtaining request comprises a block chain position index of signed data of the single plaintext data;
the first receiving unit is used for receiving the single-item plaintext data from the data encryption end, the block chain position index of the signed data of the single-item plaintext data and a hash algorithm; receiving a first hash value corresponding to single plaintext data from a block chain network;
the judging unit is used for judging whether the single plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single plaintext data;
and the output unit is used for outputting the single plaintext data when the single plaintext data is correct.
The embodiment of the present invention further provides a block chain data privacy control device, which is applied to a data encryption end, and includes:
the second receiving unit is used for receiving a data viewing request from a data viewing end;
the first extraction unit is used for extracting the block chain position indexes of the single plaintext data corresponding to the single plaintext data label and the signed data of the single plaintext data according to the single plaintext data label in the data checking request;
and the second sending unit is used for sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to the data viewing end.
The embodiment of the invention also provides a block chain data privacy control device, which is applied to a block chain network and comprises the following steps:
the third receiving unit is used for receiving a data acquisition request from the data viewing end;
the second extraction unit is used for extracting a first hash value corresponding to a single plaintext data label according to the block chain position index of the signed data of the single plaintext data in the data acquisition request;
and the third sending unit is used for sending the first hash value corresponding to the single plaintext data label to the data viewing end.
The embodiment of the invention also provides a block chain data privacy control device, which is applied to a data endorsement end and comprises the following steps:
a fourth receiving unit, configured to receive service data; receiving a plurality of single-item encrypted data from a data encryption end;
the splitting unit is used for splitting the service data into a plurality of single plaintext data;
the first calculation unit is used for calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number;
the fourth sending unit is used for sending the hash algorithm and the single plaintext data to the data encryption end; sending the signed data to a blockchain network;
the endorsement unit is used for signing and endorseing a plurality of single encrypted data;
and the signed data generating unit is used for generating the signed data of each single item of plaintext data according to the single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data.
An embodiment of the present invention further provides a block chain data privacy control system, including:
the blockchain data privacy control device is applied to the data viewing end;
the block chain data privacy control device applied to the data encryption terminal;
the block chain data privacy control device applied to the block chain network;
the block chain data privacy control device applied to the data endorsement end is described above.
According to the block chain data privacy control method, device and system provided by the embodiment of the invention, data leakage can be avoided, and the privacy of the data is ensured.
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 will be briefly introduced 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 that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a blockchain data privacy control method (from a data viewer perspective) in an embodiment of the invention;
FIG. 2 is a flow chart of a blockchain data privacy control method (from the perspective of a data encryption end) according to a first embodiment of the present invention;
FIG. 3 is a flowchart of a blockchain data privacy control method (from the perspective of a data encryption end) according to a second embodiment of the present invention;
FIG. 4 is a flow chart of a blockchain data privacy control method (from a blockchain network perspective) in a first embodiment of the present invention;
FIG. 5 is a flow chart of a blockchain data privacy control method (from a blockchain network perspective) in a second embodiment of the present invention;
FIG. 6 is a flow chart of a blockchain data privacy control method (from a data endorsement side perspective) in an embodiment of the invention;
FIG. 7 is a flowchart of S602 in an embodiment of the present invention;
FIG. 8 is a block diagram of a blockchain data privacy control apparatus applied to a data viewer in an embodiment of the present invention;
fig. 9 is a block diagram of a block chain data privacy control device applied to a data encryption terminal in an embodiment of the present invention;
fig. 10 is a block diagram of a block chain data privacy control apparatus applied to a block chain network according to an embodiment of the present invention;
fig. 11 is a block diagram of a block chain data privacy control device applied to a data endorsement end in an embodiment of the present invention;
fig. 12 is a block diagram of a block chain data privacy control system 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.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
In view of the large risk of data leakage in the prior art, embodiments of the present invention provide a block chain data privacy control method, apparatus, and system, which can avoid data leakage and ensure data privacy. The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a flow chart of a method for controlling block chain data privacy (from the perspective of a data viewer) in an embodiment of the present invention. As shown in fig. 1, the method for controlling block chain data privacy includes:
s101: sending a data viewing request to a data encryption end; wherein the data viewing request includes a single plaintext data tag.
S102: and receiving the single-item plaintext data from the data encryption end, and the block chain position index and the hash algorithm of the signed data of the single-item plaintext data.
S103: sending a data acquisition request to a blockchain network; the data acquisition request comprises a block chain position index of signed data of a single item of plaintext data.
S104: and receiving a first hash value corresponding to the single plaintext data from the blockchain network.
S105: and judging whether the single plaintext data is correct or not according to the hash algorithm and the first hash value corresponding to the single plaintext data.
S106: and when the single-item plaintext data is correct, outputting the single-item plaintext data.
The execution subject of the blockchain data privacy control method shown in fig. 1 may be a blockchain data privacy control device applied to a data viewer. As can be seen from the process shown in fig. 1, in the block chain data privacy control method (from the perspective of the data viewing end), a data viewing request is first sent to the data encryption end, the single item of plaintext data from the data encryption end and the block chain position index and the hash algorithm of the signed data of the single item of plaintext data are received, a data acquisition request is then sent to the block chain network, the first hash value corresponding to the single item of plaintext data from the block chain network is received, and finally, whether the single item of plaintext data is correct or not is determined according to the hash algorithm and the first hash value corresponding to the single item of plaintext data.
In one embodiment, the first hash value corresponding to a single plaintext data item includes a first preceding hash value and a first following hash value;
s105 includes: calculating a second hash value after the first preamble corresponding to the single plaintext data according to the hash value before the first preamble corresponding to the single plaintext data and a hash algorithm; when the second hash value is equal to the first hash value, it indicates that the single plaintext data is correct, then S106 is executed to output the single plaintext data.
The specific flow of the blockchain data privacy control method (from the perspective of the data viewing end) is as follows:
1. sending a data viewing request to a data encryption end; the data view request includes a single plaintext data tag.
2. And receiving the single-item plaintext data from the data encryption end, and the block chain position index and the hash algorithm of the signed data of the single-item plaintext data.
3. A data acquisition request is sent to the blockchain network. The data acquisition request includes a blockchain position index of the signed data of the single item of plaintext data.
4. And receiving a first hash value corresponding to the single plaintext data from the blockchain network. The first hash value includes a first preceding hash value and a first following hash value.
5. Calculating a second hash value after the first preamble corresponding to the single plaintext data according to the hash value before the first preamble corresponding to the single plaintext data and a hash algorithm; and when the second hash value is equal to the first hash value, the single plaintext data is correct, and the single plaintext data is output.
To sum up, the block chain data privacy control method (from the perspective of the data viewing end) according to the embodiment of the present invention firstly sends a data viewing request to the data encryption end, receives single plaintext data from the data encryption end, and a block chain position index and a hash algorithm of signed data of the single plaintext data, then sends a data acquisition request to the block chain network, receives a first hash value corresponding to the single plaintext data from the block chain network, and finally determines whether the single plaintext data is correct according to the hash algorithm and the first hash value corresponding to the single plaintext data.
Fig. 2 is a flowchart of a method for controlling block chain data privacy (from the perspective of a data encryption end) according to a first embodiment of the present invention. As shown in fig. 2, the method for controlling block chain data privacy includes:
s201: and receiving a data viewing request from a data viewing terminal.
S202: and extracting the block chain position indexes of the single plaintext data corresponding to the single plaintext data label and the signed data of the single plaintext data according to the single plaintext data label in the data checking request.
The data encryption end only needs to send the corresponding single plaintext data and the block chain position index of the signed data of the single plaintext data to the data viewing end according to the single plaintext data tag in the data viewing request, and all the single plaintext data and the block chain position index thereof do not need to be sent.
S203: and sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to a data viewing end.
The single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data, and the hash algorithm can be sent to the data viewing end based on a Transport Layer Security (TLS).
The execution subject of the blockchain data privacy control method shown in fig. 2 may be a blockchain data privacy control device applied to the data encryption end. As can be seen from the flow shown in fig. 2, the block chain data privacy control method (from the perspective of the data encryption terminal) in the embodiment of the present invention receives a data viewing request from the data viewing terminal, extracts the block chain position indexes of the single plaintext data and the signed data of the single plaintext data corresponding to the single plaintext data label according to the single plaintext data label in the data viewing request, and sends the block chain position indexes of the single plaintext data and the signed data of the single plaintext data and the hash algorithm to the data viewing terminal, so that data leakage can be avoided, and the privacy of the data can be ensured.
Fig. 3 is a flowchart of a blockchain data privacy control method (from the perspective of a data encryption end) according to a second embodiment of the present invention. As shown in fig. 3, before performing S201, the method for controlling block chain data privacy further includes:
s301: and receiving and storing a plurality of single-item plaintext data from the data endorsement end and a hash algorithm.
Each single plaintext data can be arranged according to a single line of a queue, and can also be structured storage with a dependency relationship.
S302: and encrypting each single plaintext data to obtain a plurality of single encrypted data.
In specific implementation, each single plaintext data may be encrypted by a preset key and an encryption algorithm, and each divided single plaintext data may be encrypted by different keys and encryption algorithms, respectively, where the encryption form includes, but is not limited to, a symmetric encryption algorithm.
S303: and sending a plurality of single encrypted data to the data endorsement end.
S304: a blockchain position index of signed data for each single item of plaintext data from the blockchain network is received and stored.
In specific implementation, the data encryption terminal includes a private data warehouse for storing and backing up a plurality of single items of plaintext data, and data such as a block chain position index, a hash algorithm, a key, an encryption algorithm, and the like of signed data of each single item of plaintext data. The private data warehouse can be in any form, as long as the storage mode is controllable, and any form of data backup is allowed.
The specific flow of the block chain data privacy control method (from the perspective of the data encryption end) is as follows:
1. and receiving and storing a plurality of single-item plaintext data from a data endorsement end and a hash algorithm, wherein each single-item plaintext data can be arranged according to a single line of a queue or can be structured storage with a dependency relationship.
2. And encrypting each single plaintext data through a preset secret key and an encryption algorithm to obtain a plurality of single encrypted data.
3. The method comprises the steps of sending a plurality of single encrypted data to a data endorsement end, receiving and storing a block chain position index of signed data of each single plaintext data from a block chain network, and receiving a data viewing request from a data viewing end.
4. And extracting the block chain position indexes of the single plaintext data corresponding to the single plaintext data label and the signed data of the single plaintext data according to the single plaintext data label in the data checking request.
5. And sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to a data viewing end based on a secure transport layer encryption protocol.
To sum up, the block chain data privacy control method (from the perspective of the data encryption end) of the embodiment of the present invention receives a data viewing request from the data viewing end, extracts the block chain position indexes of the single plaintext data and the signed data of the single plaintext data corresponding to the single plaintext data label according to the single plaintext data label in the data viewing request, and sends the block chain position indexes of the single plaintext data and the signed data of the single plaintext data and the hash algorithm to the data viewing end, so as to avoid data leakage and ensure the privacy of the data.
Fig. 4 is a flow chart of a blockchain data privacy control method (from a blockchain network perspective) in a first embodiment of the invention. As shown in fig. 4, the method for controlling block chain data privacy includes:
s401: and receiving a data acquisition request from the data viewing end.
S402: and extracting a first hash value corresponding to the single plaintext data label according to the block chain position index of the signed data of the single plaintext data in the data acquisition request.
S403: and sending a first hash value corresponding to the single plaintext data label to the data viewing end.
The execution subject of the block chain data privacy control method shown in fig. 4 may be a block chain data privacy control device applied to a block chain network. As can be seen from the flow shown in fig. 4, in the block chain data privacy control method (from the view of the block chain network), a data acquisition request from a data viewing end is received, a first hash value corresponding to a single plaintext data tag is extracted according to a block chain position index of signed data of the single plaintext data in the data acquisition request, and finally, the first hash value corresponding to the single plaintext data tag is sent to the data viewing end, so that data leakage can be avoided, and the privacy of the data is ensured.
Fig. 5 is a flow chart of a blockchain data privacy control method (from a blockchain network perspective) in a second embodiment of the invention. As shown in fig. 5, before performing S401, the method for controlling block chain data privacy further includes:
s501: and receiving and storing signed data of each single item of plaintext data from the data endorsement end.
S502: a blockchain position index of the signed data for each single item of plaintext data is generated.
S503: and sending the block chain position index of the signed data of each single item of plaintext data to a data encryption end.
The specific process of the blockchain data privacy control method (from the view of blockchain network) is as follows:
1. and receiving and storing the signed data of each single item of plaintext data from the data endorsement end, and generating a block chain position index of the signed data of each single item of plaintext data.
2. And sending the block chain position index of the signed data of each single item of plaintext data to the data encryption end, and receiving a data acquisition request from the data viewing end.
3. And extracting a first hash value corresponding to the single plaintext data label according to the block chain position index of the signed data of the single plaintext data in the data acquisition request, and sending the first hash value corresponding to the single plaintext data label to the data viewing end.
To sum up, the block chain data privacy control method (from the view of the block chain network) in the embodiment of the present invention receives a data acquisition request from a data viewing end, extracts a first hash value corresponding to a single plaintext data tag according to a block chain position index of signed data of the single plaintext data in the data acquisition request, and sends the first hash value corresponding to the single plaintext data tag to the data viewing end, so as to avoid data leakage and ensure privacy of the data.
Fig. 6 is a flowchart of a method for controlling block chain data privacy (from the perspective of a data endorsement end) in an embodiment of the present invention. As shown in fig. 6, the method for controlling block chain data privacy includes:
s601: and receiving the service data, and splitting the service data into a plurality of single plaintext data.
Wherein the service data comes from an external system.
S602: and calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number.
Wherein the hash algorithm includes all available hash algorithms.
S603: and sending the hash algorithm and the plurality of single-item plaintext data to a data encryption end.
S604: and receiving a plurality of single-item encrypted data from the data encryption terminal.
S605: and signing and endorsement are carried out on a plurality of single encrypted data.
S606: and generating the signed data of each single item of plaintext data according to the single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data.
The signed data of each single item of plaintext data consists of a first front hash value of the single item of encrypted data, the single item of encrypted data subjected to signature endorsement and a first back hash value of the single item of encrypted data.
S607: and sending the signed data to the blockchain network.
The execution main body of the block chain data privacy control method shown in fig. 6 may be a block chain data privacy control device applied to a data endorsement end. As can be seen from the flow shown in fig. 6, in the block chain data privacy control method (from the perspective of the data endorsement end), the service data is received first, the service data is split into a plurality of single plaintext data, then the first hash value corresponding to each single plaintext data is calculated according to the preset hash algorithm and the random number, then the hash algorithm and the plurality of single plaintext data are sent to the data encryption end, then the plurality of single encrypted data from the data encryption end are received, the signature endorsement is performed on the plurality of single encrypted data, and finally the signed data of each single plaintext data is generated according to each single encrypted data subjected to the signature endorsement and the first hash value corresponding to each single plaintext data, and the signed data is sent to the block chain network, so that data leakage is avoided, and the privacy of the data is ensured.
In the embodiment, when the signed data is uploaded for the first time, all the signed data of a single plaintext data item need to be uploaded to the blockchain network. When the signed data is uploaded again, only the signed data of the modified single item of plaintext data needs to be uploaded. For example, the data endorsement side splits the service data into 10 single plaintext data. When the 8 th single-item plaintext data is modified, the first hash value of the 8 th single-item plaintext data (i.e., the first hash value of the 9 th single-item plaintext data), the first hash value of the 9 th single-item plaintext data (i.e., the first hash value of the 10 th single-item plaintext data), and the first hash value of the 10 th single-item plaintext data need to be recalculated, i.e., the 8 th single-item plaintext data and all the hash values referred to later need to be modified. At this time, the signed data of the 8 th single plaintext data, the signed data of the 9 th single plaintext data, and the signed data of the 10 th single plaintext data all change, so that the signed data of the 8 th single plaintext data, the signed data of the 9 th single plaintext data, and the signed data of the 10 th single plaintext data need to be uploaded to the blockchain network.
Fig. 7 is a flowchart of S602 in the embodiment of the present invention. As shown in fig. 7, S602 includes:
s701: and taking the random number as a first preceding hash value of one single-item plaintext data.
S702: and calculating the first hash value of the single plaintext data according to a preset hash algorithm and the first hash value of the single plaintext data.
S703: and taking the first postamble hash value of the previous single-item plaintext data as the first previous hash value of the next single-item plaintext data.
In an embodiment, before performing S605, the method further includes: calculating a third hash value corresponding to each single plaintext data according to a hash algorithm and a random number; when the third hash value corresponding to each single plaintext data is the same as the first hash value corresponding to each single plaintext data, S605 is executed.
In specific implementation, the third hash value before and the third hash value after the third hash value corresponding to each single plaintext data item need to be calculated according to the hash algorithm and the random number. When the third hash value of the preamble corresponding to each single plaintext data is the same as the first hash value of the preamble corresponding to each single plaintext data, and the third hash value of the postamble corresponding to each single plaintext data is the same as the first hash value of the postamble corresponding to each single plaintext data, it is indicated that the hash value of each single plaintext data is correct, and then signature endorsement is performed on a plurality of single encrypted data, so that the authenticity of the data can be verified.
The specific flow of the block chain data privacy control method (from the perspective of the data endorsement end) is as follows:
1. and receiving service data from an external system, and splitting the service data into a plurality of single plaintext data.
For example, the traffic data from the external system is as follows:
“DATA-Begin：Data-part-1；Data-part-2；Data-part-3；Data-part-4；Data-part-5；Data-part-6；Data-part-7；Data-part-8；Data-part-9；Data-part-10；DATA-End”。
the data endorsement end splits the service data into a plurality of single plaintext data as follows:
part1:“DATA-Begin：Data-part-1；”
part2:“Data-part-2；”
part3:“Data-part-3；”
part4:“Data-part-4；”
part5:“Data-part-5；”
part6:“Data-part-6；”
part7:“Data-part-7；”
part8:“Data-part-8；”
part9:“Data-part-9；”
part10:“Data-part-10；DATA-End”。
2. and taking the random number as a first preceding hash value of one single-item plaintext data.
For example, nonces hashvalue is used as a random number.
3. And calculating a first postamble hash value of the single plaintext data according to a preset hash algorithm and the first previous hash value of the single plaintext data, and taking the first postamble hash value of the previous single plaintext data as the first previous hash value of the next single plaintext data.
Setting the first postamble hash value as currentHashValue, and the previous hash value as preHashValue, then currentHashValue n ═ f (preHashValue n), and f () is a preset hash algorithm; currentHashValue n ═ preHashValue n + 1. For example, when n is 2, currentHashValue 2 is f (preHashValue 2). currentHashValue 2 ═ preHashValue 3.
Therefore, a first preamble hash value nonces HashValue and a first postamble hash value currentHashValue 1 corresponding to the first single plaintext data can be obtained through calculation; the first preamble hash value preHashValue 2 and the first postamble hash value currentHashValue 2 corresponding to the second single plaintext data; a first preamble hash value preHashValue 3 and a first postamble hash value currentHashValue 3 corresponding to the third single-item plaintext data; a first preamble hash value preHashValue 4 and a first postamble hash value currentHashValue 4 corresponding to the fourth single plaintext data; a first preamble hash value preHashValue 5 and a first postamble hash value currentHashValue 5 corresponding to the fifth single plaintext data; the first preamble hash value preHashValue 6 and the first postamble hash value currentHashValue 6 corresponding to the sixth single plaintext data; a first hash value preHashValue 7 and a first hash value currentHashValue 7 corresponding to a seventh single-item plaintext data; the first preamble hash value preHashValue 8 and the first postamble hash value currentHashValue 8 corresponding to the eighth single plaintext data; the ninth single plaintext data corresponds to a first preamble hash value preHashValue 9 and a first postamble hash value currentHashValue 9; the tenth single plaintext data corresponds to the first hash value preHashValue 10 and the first hash value currentHashValue 10.
4. And sending the hash algorithm and the plurality of single-item plaintext data to a data encryption end, and receiving the plurality of single-item encrypted data from the data encryption end.
5. Calculating a third hash value corresponding to each single plaintext data according to a hash algorithm and a random number; and when the third hash value corresponding to each single item of plaintext data is the same as the first hash value corresponding to each single item of plaintext data, signing and endorsement are carried out on the plurality of single items of encrypted data. The form of the signature endorsement of the data can be any endorsement form, for example, an endorser uses an identity private key to sign the data, and a verifier can verify the correctness of the signature according to the public key of the endorser so as to prove that the data is indeed approved by the endorser.
The single encrypted data subjected to signature endorsement is as follows:
crypto1(“DATA-Begin：Data-part-1；”)；
crypto2(“Data-part-2；”)；
crypto3(“Data-part-3；”)；
crypto4(“Data-part-4；”)；
crypto5(“Data-part-5；”)；
crypto6(“Data-part-6；”)；
crypto7(“Data-part-7；”)；
crypto8(“Data-part-8；”)；
crypto9(“Data-part-9；”)；
crypto10(“Data-part-10；DATA-End”)。
6. and generating the signed data of each single item of plaintext data according to the single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data. The signed data of each single item of plaintext data consists of a first hash value of a preamble of the single item of encrypted data, the single item of encrypted data subjected to signature endorsement and the first hash value of a postamble of the single item of encrypted data, and the following steps are performed:
key1:nonceHashValue+crypto1(“DATA-Begin：Data-part-1；”)+currentHashValue1,
key2:preHashValue2+crypto2(“Data-part-2；”)+currentHashValue2,
key3:preHashValue3+crypto3(“Data-part-3；”)+currentHashValue3,
key4:preHashValue4+crypto4(“Data-part-4；”)+currentHashValue4,
key5:preHashValue5+crypto5(“Data-part-5；”)+currentHashValue5,
key6:preHashValue6+crypto6(“Data-part-6；”)+currentHashValue6,
key7:preHashValue7+crypto7(“Data-part-7；”)+currentHashValue7,
key8:preHashValue8+crypto8(“Data-part-8；”)+currentHashValue8,
key9:preHashValue9+crypto9(“Data-part-9；”)+currentHashValue9,
key10:preHashValue10+crypto10(“Data-part-10；DATA-End”)+currentHashValue10。
wherein, Key is signed data.
The manner in which the data is split may be iterative in nature. Each single item of plaintext data may be stored in a complex structure, not necessarily in a linear arrangement. For example, when the sixth single item of plaintext data has two children, the signed data of the sixth single item of plaintext data may be represented as:
key6_1:preHashValue6_1+crypto6_1(“Data-part-6_1；”)+currentHashValue6_1,
key6_2:preHashValue6_2+crypto6_2(“Data-part-6_2；”)+currentHashValue6_2,
key6:preHashValue6+crypto6(“Data-part-6；”)+currentHashValue6。
when sub-items with complex structures are encountered, the principle is to split each sub-item according to the service granularity, and a depth-first rule is adopted when the hash value is calculated in an iterative manner.
7. And sending the signed data to the blockchain network.
To sum up, the block chain data privacy control method (from the perspective of a data endorsement end) in the embodiment of the present invention receives service data, splits the service data into a plurality of single plaintext data, calculates a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number, sends the hash algorithm and the plurality of single plaintext data to a data encryption end, receives a plurality of single encrypted data from the data encryption end, performs signature endorsement on the plurality of single encrypted data, and generates signed data of each single plaintext data according to each signed endorsed single encrypted data and the first hash value corresponding to each single plaintext data, and sends the signed data to a block chain network, so as to avoid data leakage and ensure data privacy.
Based on the same inventive concept, the embodiment of the present invention further provides a blockchain data privacy control apparatus applied to a data viewing end, and as the principle of the apparatus for solving the problem is similar to that of a blockchain data privacy control method (from the perspective of the data viewing end), the implementation of the apparatus can refer to the implementation of the method, and repeated details are not repeated.
Fig. 8 is a block diagram of a block chain data privacy control device applied to a data viewer in the embodiment of the present invention. As shown in fig. 8, the blockchain data privacy control apparatus applied to the data viewer includes:
the first sending unit is used for sending a data viewing request to the data encryption end; sending a data acquisition request to a blockchain network; the data checking request comprises a single plaintext data tag, and the data obtaining request comprises a block chain position index of signed data of the single plaintext data;
the first receiving unit is used for receiving the single-item plaintext data from the data encryption end, the block chain position index of the signed data of the single-item plaintext data and a hash algorithm; receiving a first hash value corresponding to single plaintext data from a block chain network;
the judging unit is used for judging whether the single plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single plaintext data;
and the output unit is used for outputting the single plaintext data when the single plaintext data is correct.
In one embodiment, the first hash value corresponding to the single plaintext data includes a first preceding hash value and a first following hash value;
the judgment unit is specifically configured to:
calculating a second hash value after the first preamble corresponding to the single plaintext data according to the hash value before the first preamble corresponding to the single plaintext data and a hash algorithm;
when the second hash value is equal to the first hash value, the single plaintext data is correct.
To sum up, the block chain data privacy control device applied to the data viewing end in the embodiment of the present invention first sends a data viewing request to the data encryption end, receives single plaintext data from the data encryption end and a block chain position index and a hash algorithm of signed data of the single plaintext data, sends a data acquisition request to the block chain network, receives a first hash value corresponding to the single plaintext data from the block chain network, and finally determines whether the single plaintext data is correct according to the hash algorithm and the first hash value corresponding to the single plaintext data.
Based on the same inventive concept, the embodiment of the present invention further provides a blockchain data privacy control apparatus applied to a data encryption end, and as the principle of the apparatus for solving the problem is similar to that of a blockchain data privacy control method (from the perspective of the data encryption end), the implementation of the apparatus can refer to the implementation of the method, and repeated details are not repeated.
Fig. 9 is a block diagram of a block chain data privacy control device applied to a data encryption end in the embodiment of the present invention. As shown in fig. 9, the device for controlling block chain data privacy applied to the data encryption end comprises:
the second receiving unit is used for receiving a data viewing request from a data viewing end;
the first extraction unit is used for extracting the block chain position indexes of the single plaintext data corresponding to the single plaintext data label and the signed data of the single plaintext data according to the single plaintext data label in the data checking request;
and the second sending unit is used for sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to the data viewing end.
In one embodiment, the second receiving unit is further configured to:
receiving a plurality of single-item plaintext data from a data endorsement end and a Hash algorithm; receiving a blockchain position index of signed data of each single item of plaintext data from a blockchain network;
the second transmitting unit is further configured to:
sending a plurality of single encrypted data to a data endorsement end;
the block chain data privacy control device further comprises:
the encryption unit is used for encrypting each single plaintext data to obtain a plurality of single encrypted data;
the first storage unit is used for storing a plurality of single-item plaintext data from a data endorsement end and a hash algorithm; a blockchain position index of the signed data for each single item of plaintext data from the blockchain network is stored.
To sum up, the block chain data privacy control device applied to the data encryption end of the embodiment of the present invention receives a data check request from the data check end, extracts the block chain position indexes of the single plaintext data corresponding to the single plaintext data label and the signed data of the single plaintext data according to the single plaintext data label in the data check request, and sends the block chain position indexes of the single plaintext data and the signed data of the single plaintext data and the hash algorithm to the data check end, so as to avoid data leakage and ensure the privacy of the data.
Based on the same inventive concept, embodiments of the present invention further provide a device for controlling block chain data privacy, where the principle of the device to solve the problem is similar to that of a block chain data privacy control method (from the perspective of a block chain network), so that reference may be made to the implementation of the device for implementing the device, and repeated details are not repeated.
Fig. 10 is a block diagram of a block chain data privacy control apparatus applied to a block chain network according to an embodiment of the present invention. As shown in fig. 10, the block chain data privacy control apparatus applied to the block chain network includes:
the third receiving unit is used for receiving a data acquisition request from the data viewing end;
the second extraction unit is used for extracting a first hash value corresponding to a single plaintext data label according to the block chain position index of the signed data of the single plaintext data in the data acquisition request;
and the third sending unit is used for sending the first hash value corresponding to the single plaintext data label to the data viewing end.
In one embodiment, the third receiving unit is further configured to:
receiving signed data of each single plaintext data from a data endorsement end;
the third sending unit is further configured to:
sending the block chain position index of the signed data of each single plaintext data to a data encryption end;
the block chain data privacy control device further comprises:
the second storage unit is used for storing signed data of each single item of plaintext data from the data endorsement end;
and the block chain position index generating unit is used for generating a block chain position index of the signed data of each single item of plaintext data.
To sum up, the block chain data privacy control device applied to the block chain network in the embodiment of the present invention receives a data acquisition request from a data viewing end, extracts a first hash value corresponding to a single plaintext data tag according to a block chain position index of signed data of the single plaintext data in the data acquisition request, and sends the first hash value corresponding to the single plaintext data tag to the data viewing end, so as to avoid data leakage and ensure data privacy.
Based on the same inventive concept, the embodiment of the present invention further provides a blockchain data privacy control device applied to a data endorsement end, and as the principle of solving the problem of the device is similar to that of a blockchain data privacy control method (from the perspective of the data endorsement end), the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.
Fig. 11 is a block diagram of a block chain data privacy control device applied to a data endorsement end in an embodiment of the present invention. As shown in fig. 11, the block chain data privacy control device applied to the data endorsement end includes:
a fourth receiving unit, configured to receive service data; receiving a plurality of single-item encrypted data from a data encryption end;
the splitting unit is used for splitting the service data into a plurality of single plaintext data;
the first calculation unit is used for calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number;
the fourth sending unit is used for sending the hash algorithm and the single plaintext data to the data encryption end; sending the signed data to a blockchain network;
the endorsement unit is used for signing and endorseing a plurality of single encrypted data;
and the signed data generating unit is used for generating the signed data of each single item of plaintext data according to the single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data.
In one embodiment, the first hash value comprises a first preceding hash value and a first following hash value;
the first computing unit is specifically configured to:
taking a random number as a first preceding hash value of one single plaintext data;
calculating a first hash value of the single plaintext data according to a preset hash algorithm and the first hash value of the single plaintext data;
and taking the first postamble hash value of the previous single-item plaintext data as the first previous hash value of the next single-item plaintext data.
In one embodiment, the method further comprises the following steps:
the second calculation unit is used for calculating a third hash value corresponding to each single plaintext data according to the hash algorithm and the random number;
the endorsement unit is specifically configured to: and when the third hash value corresponding to each single item of plaintext data is the same as the first hash value corresponding to each single item of plaintext data, signing and endorsement are carried out on the plurality of single items of encrypted data.
To sum up, the block chain data privacy control device applied to the data endorsement end in the embodiment of the present invention receives service data, splits the service data into a plurality of single plaintext data, calculates a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number, sends the hash algorithm and the plurality of single plaintext data to the data encryption end, receives a plurality of single encrypted data from the data encryption end, performs signature endorsement on the plurality of single encrypted data, generates signed data of each single plaintext data according to each signed single encrypted data and the first hash value corresponding to each single plaintext data, and sends the signed data to the block chain network, so as to avoid data leakage and ensure data privacy.
Based on the same inventive concept, the embodiment of the invention also provides a block chain data privacy control system. Fig. 12 is a block diagram of a block chain data privacy control system according to an embodiment of the present invention. As shown in fig. 12, the blockchain data privacy control system includes the blockchain data privacy control apparatus applied to the data viewer as described above; the block chain data privacy control device applied to the data encryption terminal; the block chain data privacy control device applied to the block chain network; the block chain data privacy control device applied to the data endorsement end is described above.
The specific process of the block chain data privacy control system is as follows:
1. and the data endorsement end receives the service data from the external system and splits the service data into a plurality of single plaintext data.
2. The data endorsement end takes a random number as a first preceding hash value of one single plaintext data, calculates a first following hash value of the single plaintext data according to a preset hash algorithm and the first preceding hash value of the single plaintext data, and takes the first following hash value of the previous single plaintext data as a first preceding hash value of the next single plaintext data.
3. And the data endorsement end sends the hash algorithm and the single plaintext data to the data encryption end.
4. The data encryption end receives and stores a plurality of single plaintext data and a Hash algorithm from the data endorsement end, and encrypts each single plaintext data through a preset secret key and an encryption algorithm to obtain a plurality of single encrypted data.
5. And the data encryption end sends a plurality of single encrypted data to the data endorsement end.
6. The data endorsement end receives a plurality of single encrypted data from the data encryption end, and a third hash value corresponding to each single plaintext data is calculated according to a hash algorithm and a random number; and when the third hash value corresponding to each single item of plaintext data is the same as the first hash value corresponding to each single item of plaintext data, signing and endorsement are carried out on the plurality of single items of encrypted data.
7. And the data endorsement end generates signed data of each single item of plaintext data according to each single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data.
8. And the data endorsement end sends the signed data to the block chain network.
9. The block chain network receives and stores the signed data of each single item of plaintext data from the data endorsement end, generates a block chain position index of the signed data of each single item of plaintext data, and sends the block chain position index of the signed data of each single item of plaintext data to the data encryption end.
10. The data encryption terminal receives and stores a blockchain position index of the signed data of each single item of plaintext data from the blockchain network.
11. The data viewing end sends a data viewing request to the data encryption end; the data view request includes a single plaintext data tag.
12. The data encryption end receives a data viewing request from the data viewing end, extracts single plaintext data corresponding to a single plaintext data label and a block chain position index of signed data of the single plaintext data according to the single plaintext data label in the data viewing request, and sends a first hash value corresponding to the single plaintext data label to the data viewing end.
13. The data viewing end receives the single-item plaintext data from the data encryption end, the block chain position index and the hash algorithm of the signed data of the single-item plaintext data, and sends a data acquisition request to the block chain network. The data acquisition request includes a blockchain position index of the signed data of the single item of plaintext data.
14. The block chain network receives a data acquisition request from a data viewing end, extracts a first hash value corresponding to a single plaintext data label according to a block chain position index of signed data of the single plaintext data in the data acquisition request, and sends the first hash value corresponding to the single plaintext data label to the data viewing end.
15. The data viewing end receives a first hash value corresponding to the single plaintext data from the blockchain network. The first hash value includes a first preceding hash value and a first following hash value.
16. The data viewing end calculates a second hash value after the single plaintext data according to the first hash value before the single plaintext data and the hash algorithm; and when the second hash value is equal to the first hash value, the single plaintext data is correct, and the single plaintext data is output.
In summary, the block chain data privacy control system in the embodiment of the present invention can avoid data leakage and ensure data privacy.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for controlling block chain data privacy, comprising:
sending a data viewing request to a data encryption end; wherein the data viewing request comprises a single plaintext data tag;
receiving single-item plaintext data from the data encryption end, and a block chain position index and a hash algorithm of signed data of the single-item plaintext data;
sending a data acquisition request to a blockchain network; wherein the data acquisition request comprises a blockchain position index of signed data of the single item of plaintext data;
receiving a first hash value corresponding to the single plaintext data from the blockchain network;
judging whether the single-item plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single-item plaintext data;
when the single plaintext data is correct, outputting the single plaintext data;
the first hash value corresponding to the single plaintext data comprises a first preceding hash value and a first following hash value;
judging whether the single item of plaintext data is correct according to the hash algorithm and a first hash value corresponding to the single item of plaintext data, including:
calculating a second hash value after the first preamble corresponding to the single plaintext data according to the hash value before the first preamble corresponding to the single plaintext data and the hash algorithm;
when the second hash value is equal to the first hash value, the single plaintext data is correct.
2. A method for controlling block chain data privacy, comprising:
receiving service data, and splitting the service data into a plurality of single plaintext data;
calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number;
sending the hash algorithm and the single plaintext data to a data encryption end;
receiving a plurality of single-item encrypted data from the data encryption terminal;
signing endorsements on the plurality of single encrypted data;
generating signed data of each single item of plaintext data according to each single item of encrypted data subjected to signature endorsement and a first hash value corresponding to each single item of plaintext data;
sending the signed data to a blockchain network;
the first hash value comprises a first preceding hash value and a first following hash value;
calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number, wherein the method comprises the following steps:
taking the random number as a first preceding hash value of one single plaintext data;
calculating a first hash value of the single plaintext data according to a preset hash algorithm and the first hash value of the single plaintext data;
and taking the first postamble hash value of the previous single-item plaintext data as the first previous hash value of the next single-item plaintext data.
3. The blockchain data privacy control method of claim 2, wherein before signing the plurality of single encrypted data, further comprising:
calculating a third hash value corresponding to each single plaintext data according to the hash algorithm and the random number;
and when the third hash value corresponding to each single item of plaintext data is the same as the first hash value corresponding to each single item of plaintext data, signing the multiple single items of encrypted data.
4. A block chain data privacy control device is applied to a data viewing end and is characterized by comprising:
the first sending unit is used for sending a data viewing request to the data encryption end; sending a data acquisition request to a blockchain network; the data viewing request comprises a single-item plaintext data tag, and the data obtaining request comprises a block chain position index of signed data of the single-item plaintext data;
the first receiving unit is used for receiving single-item plaintext data from the data encryption end, and a block chain position index and a hash algorithm of signed data of the single-item plaintext data; receiving a first hash value corresponding to the single plaintext data from the blockchain network;
the judging unit is used for judging whether the single-item plaintext data is correct or not according to the hash algorithm and a first hash value corresponding to the single-item plaintext data;
the output unit is used for outputting the single plaintext data when the single plaintext data is correct;
the first hash value corresponding to the single plaintext data comprises a first preceding hash value and a first following hash value;
the judgment unit is specifically configured to:
calculating a second hash value after the first preamble corresponding to the single plaintext data according to the hash value before the first preamble corresponding to the single plaintext data and the hash algorithm;
when the second hash value is equal to the first hash value, the single plaintext data is correct.
5. A block chain data privacy control device applied to a data endorsement end is characterized by comprising:
a fourth receiving unit, configured to receive service data; receiving a plurality of single-item encrypted data from a data encryption end;
the splitting unit is used for splitting the service data into a plurality of single plaintext data;
the first calculation unit is used for calculating a first hash value corresponding to each single plaintext data according to a preset hash algorithm and a random number;
the fourth sending unit is used for sending the hash algorithm and the single plaintext data to the data encryption end; sending the signed data to a blockchain network;
the endorsement unit is used for signing and endorseing the single encrypted data;
the signed data generating unit is used for generating signed data of each single item of plaintext data according to each single item of encrypted data subjected to signature endorsement and the first hash value corresponding to each single item of plaintext data;
the first hash value comprises a first preceding hash value and a first following hash value;
the first computing unit is specifically configured to:
taking the random number as a first preceding hash value of one single plaintext data;
calculating a first hash value of the single plaintext data according to a preset hash algorithm and the first hash value of the single plaintext data;
and taking the first postamble hash value of the previous single-item plaintext data as the first previous hash value of the next single-item plaintext data.
6. The blockchain data privacy control device of claim 5, applied to a data endorsement end, further comprising:
the second calculation unit is used for calculating a third hash value corresponding to each single plaintext data according to the hash algorithm and the random number;
the endorsement unit is specifically configured to: and when the third hash value corresponding to each single item of plaintext data is the same as the first hash value corresponding to each single item of plaintext data, signing the multiple single items of encrypted data.
7. A blockchain data privacy control system, comprising:
the blockchain data privacy control apparatus of claim 4 applied to a data viewer;
be applied to block chain data privacy control device of data encryption end, include:
the second receiving unit is used for receiving a data viewing request from a data viewing end;
a first extraction unit, configured to extract, according to a single plaintext data tag in the data checking request, a block chain position index of the single plaintext data corresponding to the single plaintext data tag and signed data of the single plaintext data;
the second sending unit is used for sending the single-item plaintext data, the block chain position index of the signed data of the single-item plaintext data and the hash algorithm to the data viewing end;
be applied to block chain data privacy control device of block chain network, include:
the third receiving unit is used for receiving a data acquisition request from the data viewing end;
a second extraction unit, configured to extract a first hash value corresponding to a single plaintext data tag according to a blockchain position index of signed data of the single plaintext data in the data acquisition request;
a third sending unit, configured to send the first hash value corresponding to the single plaintext data tag to the data viewing end;
the blockchain data privacy control device applied to the data endorsement end of any one of claims 5 to 6.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060129847A1 (en) * | 2002-09-17 | 2006-06-15 | Errikos Pitsos | Methods and systems for providing a secure data distribution via public networks |
| CN106022145A (en) * | 2016-05-17 | 2016-10-12 | 上海凭安网络科技有限公司 | Cryptograph index-based data query method |
| CN108702287A (en) * | 2018-04-16 | 2018-10-23 | 深圳前海达闼云端智能科技有限公司 | Information publication based on block chain and acquisition methods, device and block chain node |
| CN109347878A (en) * | 2018-11-30 | 2019-02-15 | 西安电子科技大学 | The data verification of decentralization and data safety transaction system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610578B (en) * | 2016-01-25 | 2019-05-03 | 杭州复杂美科技有限公司 | Block chain information deposits card and method for secret protection |
| CN107807951B (en) * | 2017-09-18 | 2020-10-13 | 联动优势科技有限公司 | Block chain generation method, data verification method, node and system |
| CN108833370A (en) * | 2018-05-28 | 2018-11-16 | 江苏众享金联科技有限公司 | It is a kind of difference trust domain under from block chain read user privacy information method |
| CN108712251A (en) * | 2018-05-28 | 2018-10-26 | 江苏众享金联科技有限公司 | It is a kind of difference trust domain under to block chain be written user privacy information method |
-
2019
- 2019-03-15 CN CN201910197898.9A patent/CN109949035B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060129847A1 (en) * | 2002-09-17 | 2006-06-15 | Errikos Pitsos | Methods and systems for providing a secure data distribution via public networks |
| CN106022145A (en) * | 2016-05-17 | 2016-10-12 | 上海凭安网络科技有限公司 | Cryptograph index-based data query method |
| CN108702287A (en) * | 2018-04-16 | 2018-10-23 | 深圳前海达闼云端智能科技有限公司 | Information publication based on block chain and acquisition methods, device and block chain node |
| CN109347878A (en) * | 2018-11-30 | 2019-02-15 | 西安电子科技大学 | The data verification of decentralization and data safety transaction system and method |
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