CN113111386A - Privacy protection method for block chain transaction data - Google Patents
Privacy protection method for block chain transaction data Download PDFInfo
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- CN113111386A CN113111386A CN202110478429.1A CN202110478429A CN113111386A CN 113111386 A CN113111386 A CN 113111386A CN 202110478429 A CN202110478429 A CN 202110478429A CN 113111386 A CN113111386 A CN 113111386A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012795 verification Methods 0.000 claims description 33
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 230000006399 behavior Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
Abstract
The invention discloses a privacy protection method for block chain transaction data, which comprises the following steps: the transaction sender uploads the basic information data and the transaction intention data generation block to a block chain to complete registration; verifying the node information of a transaction sender by using the registration information, and adding a blacklist to a malicious node which detects an access block chain; encrypting the transaction intention data and sequentially transmitting the encrypted transaction intention data to the intermediate account and the transaction receiver; the transaction receiver executes the transaction intention data, generates transaction execution data and transmits the transaction execution data back to the intermediate account, and the intermediate account encrypts and transmits the transaction intention data and the transaction execution data to both transaction parties and broadcasts the transaction intention data and the transaction execution data to the block chain at the same time. According to the privacy protection method for the block chain transaction data, disclosed by the invention, the node information is verified, the detected malicious node is added into the blacklist, and meanwhile, the transaction data is transmitted in an encryption mode, so that the privacy of the user transaction data is protected.
Description
Technical Field
The invention relates to the technical field of blockchain data protection, in particular to a privacy protection method for blockchain transaction data.
Background
The block chain is a distributed database system which is participated in by different nodes together, is an open account book system, and is composed of a string of data blocks or data packets generated according to a cryptography method, namely blocks, each block data message is automatically stamped by time, so that a data encryption value, namely a hash value, is calculated, each block comprises the hash value of the previous block, and the block chain is formed by linking the starting block to the current area. In the world of blockchains, nodes around the world participate in the accounting of the network. For example: through a workload certification mechanism, miners solve a Hash puzzle for the block generated by packaging, and submit the result to a network to wait for other nodes to verify and confirm the block, the nodes express the identities of the nodes through public keys, and the nodes exercise the transfer right of the nodes through private keys.
With the continuous development and wide application of the block chain technology, the problem of privacy disclosure is more and more prominent, and sufficient attention must be paid. Compared with the traditional centralized architecture, the block chain mechanism does not depend on specific central nodes to process and store data, so that the risks of single point breakdown and data leakage of a centralized server can be avoided. But in order to reach consensus among scattered blockchain nodes, all transaction records in the blockchain must be disclosed to all nodes, which will significantly increase the risk of privacy disclosure. For example, in a transaction, an analyst may obtain a transaction rule of a user by analyzing a transaction record, and even may infer identity information and location information of the user, because a public blockchain has a high data storage cost, an extension technology of a blockchain, a federation chain or a private chain, is generally used, and because of private maintenance in the federation chain or the private chain, a malicious node is easily present in a blockchain network, data is stolen, and potential safety hazards exist in the address information of two parties of the transaction by analyzing the data.
Disclosure of Invention
The invention aims to provide a privacy protection method for block chain transaction data, which protects the privacy of user transaction data by verifying node information, adding a detected malicious node into a blacklist and transmitting the transaction data in an encryption mode.
In order to achieve the purpose, the invention provides the following scheme:
a privacy protection method for blockchain transaction data comprises the following steps:
s1) the transaction sender generates a first basic information data block and uploads the first basic information data block to a block chain, transaction intention data is generated into a document, the document generation block is uploaded to the block chain, and the registration of the transaction sender is completed;
s2) verifying the node information of the transaction sender by using the registration information, and adding a blacklist to the malicious node which is detected to be accessed to the block chain; setting a first public key and a first private key for the transaction intention data, encrypting the transaction intention data through a second public key of the intermediate account, and transmitting the encrypted transaction intention data to the intermediate account;
s3) the intermediate account carries out first decryption verification on the transaction intention data through the second private key, encrypts the transaction intention data through the third public key of the transaction receiver and forwards the encrypted transaction intention data to the transaction receiver;
s4) the transaction receiver carries out second decryption verification on the transaction intention data through a third private key and executes the transaction intention data to obtain transaction execution data, and the transaction execution data encrypts the transaction execution data through a second public key and is transmitted back to the intermediate account to carry out third decryption verification;
s5) the intermediate account encrypts and transmits the transaction intention data and the transaction execution data through the first public key and the third public key, respectively, and simultaneously broadcasts the transaction intention data and the transaction execution data into the blockchain;
s6) the transaction sender decrypts and checks the transaction intention data and the transaction execution data respectively according to the first private key and the third private key, and transaction complete data are obtained.
Optionally, the first basic information of the transaction sender in step S1) includes an address, a contact name and a contact phone of the transaction sender.
Optionally, in step S2), verifying the node information of the transaction sender by using the registration information by using a dynamic transaction code; and adding the malicious nodes of the detected access block chain into a blacklist, wherein the detection mode adopts a node credit method.
Optionally, the transaction intention data includes a transaction intention object and a transaction intention amount, and the transaction execution data includes a transaction execution object and a transaction execution amount.
Optionally, the first decryption verification, the second decryption verification, and the third decryption verification all include legal verification.
Optionally, the second decryption verification further includes verification of transaction intention data, and the third decryption verification further includes verification of consistency comparison between the transaction intention data and the transaction execution data.
Optionally, the transaction receiver generates a block from the second basic information data and uploads the block to the block chain, so as to complete registration of the transaction receiver.
Optionally, the transaction sender and the transaction receiver both use a ring signature technology to protect their sending addresses, and use an invisible address technology to protect their receiving addresses.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: according to the privacy protection method for the block chain transaction data, the registration information is used for verifying the node information, the detected malicious nodes are added into the blacklist, meanwhile, the encryption mode is adopted for transmitting the transaction data, the intermediate account only broadcasts the transaction data into the block chain, the transaction addresses of two transaction parties are not involved, and therefore privacy of the user transaction data is protected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flowchart of a privacy protection method for blockchain transaction data according to an embodiment of the 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 privacy protection method for block chain transaction data, which protects the privacy of user transaction data by verifying node information, adding a detected malicious node into a blacklist and transmitting the transaction data in an encryption mode.
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 a privacy protection method for blockchain transaction data according to an embodiment of the present invention, and as shown in fig. 1, the privacy protection method for blockchain transaction data according to an embodiment of the present invention includes the following steps:
s1) the transaction sender generates a first basic information data block and uploads the first basic information data block to a block chain, transaction intention data is generated into a document, the document generation block is uploaded to the block chain, and the registration of the transaction sender is completed;
s2) verifying the node information of the transaction sender by using the registration information, and adding a blacklist to the malicious node which is detected to be accessed to the block chain; setting a first public key and a first private key for the transaction intention data, encrypting the transaction intention data through a second public key of the intermediate account, and transmitting the encrypted transaction intention data to the intermediate account;
s3) the intermediate account carries out first decryption verification on the transaction intention data through the second private key, encrypts the transaction intention data through the third public key of the transaction receiver and forwards the encrypted transaction intention data to the transaction receiver;
s4) the transaction receiver carries out second decryption verification on the transaction intention data through a third private key and executes the transaction intention data to obtain transaction execution data, and the transaction execution data encrypts the transaction execution data through a second public key and is transmitted back to the intermediate account to carry out third decryption verification;
s5) the intermediate account encrypts and transmits the transaction intention data and the transaction execution data through the first public key and the third public key, respectively, and simultaneously broadcasts the transaction intention data and the transaction execution data into the blockchain;
s6) the transaction sender decrypts and checks the transaction intention data and the transaction execution data respectively according to the first private key and the third private key, and transaction complete data are obtained.
The first basic information of the transaction sender in step S1) includes the address, contact name and contact phone of the transaction sender.
Verifying the node information of the transaction sender by using the registration information in the step S2) by using a dynamic transaction code; and adding the malicious nodes detected to be accessed into the blacklist, wherein the detection mode adopts a node credit method to carry out trust quantification on the behaviors of the nodes in the aspects of perception, communication and the like in the blockchain network, and then calculating the credit value of the nodes by using a mathematical algorithm to finally complete the detection task of the malicious nodes.
The transaction intention data includes a transaction intention object and a transaction intention amount, and the transaction execution data includes a transaction execution object and a transaction execution amount.
The first decryption verification, the second decryption verification and the third decryption verification all comprise legal verification.
The second decryption verification further includes verification of transaction intent data, and the third decryption verification further includes verification of consistency of the transaction intent data and transaction execution data.
And the transaction receiver generates a block by using the second basic information data and uploads the block to the block chain, so that the registration of the transaction receiver is completed.
The transaction sender and the transaction receiver both adopt a ring signature technology to protect the sending address and adopt an invisible address technology to protect the receiving address.
According to the privacy protection method for the block chain transaction data, the registration information is used for verifying the node information, the detected malicious nodes are added into the blacklist, meanwhile, the encryption mode is adopted for transmitting the transaction data, the intermediate account only broadcasts the transaction data into the block chain, the transaction addresses of two transaction parties are not involved, and therefore privacy of the user transaction data is protected.
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 (8)
1. A privacy protection method for blockchain transaction data is characterized by comprising the following steps:
s1) the transaction sender generates a first basic information data block and uploads the first basic information data block to a block chain, transaction intention data is generated into a document, the document generation block is uploaded to the block chain, and the registration of the transaction sender is completed;
s2) verifying the node information of the transaction sender by using the registration information, and adding a blacklist to the malicious node which is detected to be accessed to the block chain; setting a first public key and a first private key for the transaction intention data, encrypting the transaction intention data through a second public key of the intermediate account, and transmitting the encrypted transaction intention data to the intermediate account;
s3) the intermediate account carries out first decryption verification on the transaction intention data through the second private key, encrypts the transaction intention data through the third public key of the transaction receiver and forwards the encrypted transaction intention data to the transaction receiver;
s4) the transaction receiver carries out second decryption verification on the transaction intention data through a third private key and executes the transaction intention data to obtain transaction execution data, and the transaction execution data encrypts the transaction execution data through a second public key and is transmitted back to the intermediate account to carry out third decryption verification;
s5) the intermediate account encrypts and transmits the transaction intention data and the transaction execution data through the first public key and the third public key, respectively, and simultaneously broadcasts the transaction intention data and the transaction execution data into the blockchain;
s6) the transaction sender decrypts and checks the transaction intention data and the transaction execution data respectively according to the first private key and the third private key, and transaction complete data are obtained.
2. The method for protecting privacy of blockchain transaction data according to claim 1, wherein the first basic information of the transaction sender in step S1) includes an address, a contact name and a contact phone of the transaction sender.
3. The method for protecting privacy of blockchain transaction data according to claim 1, wherein the verifying the node information of the transaction sender by using the registration information in step S2) is performed by using a dynamic transaction code; and adding the malicious nodes of the detected access block chain into a blacklist, wherein the detection mode adopts a node credit method.
4. The method of claim 1, wherein the transaction intent data includes a transaction intent object and a transaction intent amount, and the transaction execution data includes a transaction execution object and a transaction execution amount.
5. The method of claim 1, wherein the first decryption verification, the second decryption verification, and the third decryption verification each comprise a legal verification.
6. The method of claim 5, wherein the second decryption verification further comprises verification of transaction intent data, and the third decryption verification further comprises verification of consistency comparison between the transaction intent data and transaction execution data.
7. The method for protecting privacy of blockchain transaction data according to claim 1, wherein the transaction receiver generates second basic information data into blocks and uploads the second basic information data to the blockchain, and registration of the transaction receiver is completed.
8. The method of claim 1, wherein the transaction sender and the transaction receiver both use ring signature technology to protect their sending addresses and use invisible address technology to protect their receiving addresses.
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| CN202110478429.1A CN113111386A (en) | 2021-04-30 | 2021-04-30 | Privacy protection method for block chain transaction data |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113362181A (en) * | 2021-07-20 | 2021-09-07 | 永旗(北京)科技有限公司 | Transaction method and system based on block chain |
| CN113469690A (en) * | 2021-07-23 | 2021-10-01 | 永旗(北京)科技有限公司 | Transaction settlement method based on block chain |
| CN113537787A (en) * | 2021-07-20 | 2021-10-22 | 永旗(北京)科技有限公司 | Block chain transaction monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113362181A (en) * | 2021-07-20 | 2021-09-07 | 永旗(北京)科技有限公司 | Transaction method and system based on block chain |
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| CN113469690B (en) * | 2021-07-23 | 2024-03-26 | 佳乔(深圳)投资有限公司 | Transaction settlement method based on blockchain |
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