CN113342802A - Method and device for storing block chain data - Google Patents
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- 238000012546 transfer Methods 0.000 claims abstract description 32
- 238000013500 data storage Methods 0.000 claims description 13
- 238000012795 verification Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 2
- 238000004590 computer program Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2228—Indexing structures
- G06F16/2255—Hash tables
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
Abstract
The application discloses a method and a device for storing block chain data, and relates to the technical field of block chains. The method comprises the following steps: generating an account for a current user in a block chain, and creating assets under the account, wherein the assets correspond to any type of data; randomly generating a pair of keys for encryption and decryption for the data, wherein the keys comprise a first public key and a first private key; encrypting the data by using the first public key, generating a corresponding hash value for the encrypted data by a hash algorithm, and encrypting the first private key by using the personal public key of the current user; storing the encrypted data in a distributed file system, and storing the hash value and the encrypted first private key as transaction information in a blockchain. The device includes: the device comprises a creating module, a generating module, an encrypting module and a storing module. The method and the device solve the problems of low efficiency, high cost storage and complex asset transfer of the block chain, and are more widely applied.
Description
Technical Field
The present application relates to the field of blockchain technologies, and in particular, to a method and an apparatus for blockchain data storage.
Background
In current blockchain data storage, data is usually stored directly to a block, or only hash values are stored in the block, and information to be stored is stored to a centralized database.
However, the above storage method has some disadvantages. When data is directly stored in a block, the storage efficiency is low, the cost is high, and the same data requires that all or part of nodes in the network are repeatedly stored, which severely limits the size and type of data that can be stored in the block chain, such as the inability to store larger pictures and videos. When the data to be stored is stored in the centralized database, the storage becomes a short board in decentralized application, such as single point failure, decentralized requirement, and the like. In addition, no matter the data is stored in the block or the centralized database, the problem of data privacy is faced, anyone can acquire plaintext data, and the practical requirement of privacy protection cannot be met.
Disclosure of Invention
It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.
According to an aspect of the present application, there is provided a method of blockchain data storage, comprising:
generating an account for a current user in a block chain, and creating assets under the account, wherein the assets correspond to any type of data;
randomly generating a pair of keys for encryption and decryption for the data, wherein the keys comprise a first public key and a first private key;
encrypting the data by using the first public key, generating a corresponding hash value for the encrypted data by a hash algorithm, and encrypting the first private key by using the personal public key of the current user;
storing the encrypted data in a distributed file system, and storing the hash value and the encrypted first private key as transaction information in a blockchain.
Optionally, the method further comprises:
when the assets are transferred, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the first private key through the personal private key of the current user, and the first private key is added to the transaction information and stored in the block chain after being encrypted through the personal public key of the asset transfer receiver.
Optionally, the method further comprises:
after the transaction of the asset transfer is completed, when the current user or the receiver initiates an inquiry request, inquiring the transaction information in a block chain by using a personal private key of the user or the receiver; or the like, or, alternatively,
after the transaction of the asset transfer is completed, when an authorized third party initiates an inquiry request, the transaction information is inquired in the blockchain using the private key.
Optionally, the method further comprises:
when an unauthorized user initiates an authentication request, the legitimacy of the transfer asset transaction is verified by way of zero knowledge proof.
Optionally, the distributed file system is a decentralized distributed file system or a centralized distributed file system.
According to another aspect of the present application, there is provided an apparatus for blockchain data storage, including:
the system comprises a creating module, a judging module and a processing module, wherein the creating module is configured to generate an account for a current user in a block chain, and create an asset under the account, and the asset corresponds to any type of data;
a generation module configured to randomly generate a pair of keys for encryption and decryption for the data, including a first public key and a first private key;
an encryption module configured to encrypt the data using the first public key, generate a corresponding hash value for the encrypted data through a hash algorithm, and encrypt the first private key using the personal public key of the current user;
a storage module configured to store the encrypted data in a distributed file system, the hash value and the encrypted first private key being stored as transaction information in a blockchain.
Optionally, the encryption module is further configured to:
when the assets are transferred, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the first private key through the personal private key of the current user, and the first private key is added to the transaction information and stored in the block chain after being encrypted through the personal public key of the asset transfer receiver.
Optionally, the apparatus further comprises:
a query module configured to query the transaction information in a blockchain using its own personal private key when the current user or the recipient initiates a query request after the transaction of the asset transfer is completed; or configured to use a private key to query the transaction information in a blockchain when an authorized third party initiates a query request after completion of a transaction of the asset transfer.
Optionally, the apparatus further comprises:
a verification module configured to verify the legitimacy of the transfer asset transaction by way of a zero knowledge proof when an unauthorized user initiates a verification request.
Optionally, the distributed file system is a decentralized distributed file system or a centralized distributed file system.
According to yet another aspect of the application, there is provided a computing device comprising a memory, a processor and a computer program stored in the memory and executable by the processor, wherein the processor implements the method as described above when executing the computer program.
According to yet another aspect of the application, a computer-readable storage medium, preferably a non-volatile readable storage medium, is provided, having stored therein a computer program which, when executed by a processor, implements a method as described above.
According to yet another aspect of the application, there is provided a computer program product comprising computer readable code which, when executed by a computer device, causes the computer device to perform the method described above.
The technical scheme provided by the application includes that an account is generated for a current user in a blockchain, an asset is created under the account, the asset corresponds to any type of data, a pair of keys for encryption and decryption are randomly generated for the data, the key comprises a first public key and a first private key, the data is encrypted by using the first public key, a corresponding hash value is generated for the encrypted data through a hash algorithm, the first private key is encrypted by using a personal public key of the current user, the encrypted data is stored in a distributed file system, the hash value and the encrypted first private key are stored in the blockchain as transaction information, so that the data does not need to be stored in the blockchain, the problems of low efficiency and high cost storage of the blockchain are solved, and the asset is any type of data and is not limited to virtual currency, and various universal digital assets such as pictures, audio, video, code files and the like are supported, the limitation is overcome, and the application is wider. In addition, the problem of transferring complex assets is solved by storing the first private key used in data decryption in the transaction.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a flow diagram of a method of blockchain data storage according to one embodiment of the present application;
FIG. 2 is a flow diagram of a method of blockchain data storage according to another embodiment of the present application;
FIG. 3 is a block diagram of an apparatus for blockchain data storage according to another embodiment of the present application;
FIG. 4 is a block diagram of a computing device according to another embodiment of the present application;
fig. 5 is a diagram of a computer-readable storage medium structure according to another embodiment of the present application.
Detailed Description
Fig. 1 is a flow chart of a method of blockchain data storage according to one embodiment of the present application. Referring to fig. 1, the method includes:
101: generating an account for the current user in the block chain, and creating an asset under the account, wherein the asset corresponds to any type of data;
in this embodiment, optionally, the created asset refers to any valuable asset, including but not limited to: text, pictures, video, virtual currency, etc., such as original articles, photographic works, etc.
102: randomly generating a pair of keys for encryption and decryption for the data, wherein the keys comprise a first public key and a first private key;
103: encrypting data by using a first public key, generating a corresponding hash value for the encrypted data by a hash algorithm, and encrypting a first private key by using a personal public key of a current user;
104: and storing the encrypted data in a distributed file system, and storing the hash value and the encrypted first private key as transaction information in a block chain.
In this embodiment, optionally, the method further includes:
when transferring assets, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the encrypted first private key by using the personal private key of the current user, and the encrypted first private key is added to the transaction information and stored in the block chain after being encrypted by using the personal public key of the asset transfer receiver.
In this embodiment, optionally, the method further includes:
after the transaction of asset transfer is completed, when the current user or receiver initiates an inquiry request, inquiring transaction information in a block chain by using a personal private key of the user or the receiver; or the like, or, alternatively,
after the transaction for the asset transfer is complete, when an authorized third party initiates an inquiry request, the transaction information is inquired in the blockchain using the private key.
In this embodiment, optionally, the method further includes:
when an unauthorized user initiates an authentication request, the legitimacy of the transfer asset transaction is verified by means of zero knowledge proof.
In this embodiment, optionally, the distributed file system is a decentralized distributed file system or a centralized distributed file system.
The above method provided by this embodiment generates an account for a current user in a blockchain, creates an asset under the account, where the asset corresponds to any type of data, randomly generates a pair of keys for encryption and decryption for the data, where the keys include a first public key and a first private key, encrypts the data using the first public key, generates a corresponding hash value for the encrypted data through a hash algorithm, encrypts the first private key using a personal public key of the current user, stores the encrypted data in a distributed file system, stores the hash value and the encrypted first private key as transaction information in the blockchain, so that the data does not need to be stored in the blockchain, the problem of inefficient and costly storage of the blockchain itself is solved, and the asset is any type of data, and is not limited to virtual currency, and various universal digital assets such as pictures, audio, video, code files and the like are supported, the limitation is overcome, and the application is wider. In addition, the problem of transferring complex assets is solved by storing the first private key used in data decryption in the transaction. Furthermore, privacy protection is carried out on the transaction address and the transaction amount through zero knowledge proof, the privacy problem caused by transparency of the block chain is solved, and privacy protection of related beneficiaries can be realized in the process of creating assets and transferring the assets.
Fig. 2 is a flow chart of a method of blockchain data storage according to another embodiment of the present application. Referring to fig. 2, the method includes:
201: generating an account for the current user in the block chain, and creating an asset under the account, wherein the asset corresponds to any type of data;
the generation of an account is equivalent to the current user creating an identity, for example, creating an address by using bitcoin, thereby facilitating the subsequent operations such as transaction. The created assets mentioned above refer to any valuable assets, and the corresponding data of the assets can be of any type, including but not limited to: text, pictures, video, and virtual currency, such as original articles, photographic works, and the like.
202: randomly generating a pair of keys for encryption and decryption for the data, wherein the keys comprise a first public key and a first private key;
the first public key is used for encrypting the data, and the first private key is used for decrypting the encrypted data.
203: encrypting data by using a first public key, generating a corresponding hash value for the encrypted data by a hash algorithm, and encrypting a first private key by using a personal public key of a current user;
204: storing the encrypted data in a distributed file system, and storing the hash value and the encrypted first private key as transaction information in a block chain;
the distributed File System may be a decentralized distributed File System, such as an IPFS (Inter-planet File System), or a centralized distributed File System, such as an HDFS (Hadoop Distribution File System), and is not particularly limited.
For example, an asset created by a current user is a picture with the size of 1M, the picture is encrypted by using a first public key to generate encrypted data with the size of 0.8M, the encrypted data is stored in a distributed file system, a corresponding hash value is generated for the encrypted data, a first private key is encrypted by using a personal public key of the current user, and then the hash value including only dozens of bytes and the encrypted first private key are stored in a blockchain as transaction information, so that the situation that complex data are directly stored in the blockchain is avoided, the storage space utilization rate of the blockchain is greatly improved, and the cost is reduced. The user can obtain the asset through the hash value and the first private key, if desired.
205: when transferring assets, obtaining an encrypted first private key from the block chain, decrypting the encrypted first private key by using a personal private key of a current user to obtain the first private key, encrypting the encrypted first private key by using a personal public key of an asset transfer receiver, adding the encrypted first private key into transaction information and storing the encrypted first private key in the block chain;
the current user transfers the asset to the receiver, and obtains the personal public key of the receiver in advance, so that the first private key can be encrypted by the current user. The process of executing the Transaction may be implemented by using a UTXO (un-spent Transaction Output) model, or may be implemented by using an account model, which is not specifically limited in this embodiment.
It is worth mentioning that the platform for complex assets in the prior art does not support asset transfer at present, and if the mode of transferring digital money in the block chain is borrowed, other problems are brought, and the practicability is poor. For example, if 1M asset data is transferred, it is not preferable because once the transfer requires billing, and the asset is transferred one thousand times and then 1G of storage space is needed, which results in a large amount of data duplication and redundancy. By storing the encrypted first private key in the transaction, the asset data does not need to be repeatedly created, but only the first private key needs to be transferred, and the first private key is much smaller than the asset data, so that the problem of transferring complex assets is solved.
206: after the transaction of asset transfer is completed, when the current user or receiver initiates an inquiry request, inquiring the transaction information in a block chain by using a personal private key of the user or the receiver; or after the transaction of the asset transfer is completed, when an authorized third party initiates an inquiry request, inquiring the transaction information in the block chain by using the special key;
the transaction information is privacy information of the transaction, and comprises addresses of a sender and a receiver, transaction amount and the like. The current user and the receiver are participants of the transaction, and therefore have a right to view the privacy information, and in addition, an authorized third party also has a right to view the privacy information, and the third party may be an authorized government regulatory department, an auditing department, and the like, which is not specifically limited in this embodiment.
207: when an unauthorized user initiates an authentication request, the legitimacy of the transfer asset transaction is verified by means of zero knowledge proof.
In this embodiment, the zero-knowledge proof can prove the validity of the transaction without revealing any information of the transaction, so that even if an unauthorized user cannot inquire privacy information of the transaction, the validity of the transaction can still be verified through the zero-knowledge proof.
The above method provided by this embodiment generates an account for a current user in a blockchain, creates an asset under the account, where the asset corresponds to any type of data, randomly generates a pair of keys for encryption and decryption for the data, where the keys include a first public key and a first private key, encrypts the data using the first public key, generates a corresponding hash value for the encrypted data through a hash algorithm, encrypts the first private key using a personal public key of the current user, stores the encrypted data in a distributed file system, stores the hash value and the encrypted first private key as transaction information in the blockchain, so that the data does not need to be stored in the blockchain, the problem of inefficient and costly storage of the blockchain itself is solved, and the asset is any type of data, and is not limited to virtual currency, and various universal digital assets such as pictures, audio, video, code files and the like are supported, the limitation is overcome, and the application is wider. In addition, the problem of transferring complex assets is solved by storing the first private key used in data decryption in the transaction. Furthermore, privacy protection is carried out on the transaction address and the transaction amount through zero knowledge proof, the privacy problem caused by transparency of the block chain is solved, and privacy protection of related beneficiaries can be realized in the process of creating assets and transferring the assets.
Fig. 3 is a block chain data storage apparatus structure diagram according to another embodiment of the present application. Referring to fig. 3, the apparatus includes:
a creating module 301 configured to generate an account for a current user in a blockchain, and create an asset under the account, where the asset corresponds to any type of data;
a generation module 302 configured to randomly generate a pair of keys for encryption and decryption for data, including a first public key and a first private key;
an encryption module 303 configured to encrypt data using the first public key, generate a corresponding hash value for the encrypted data through a hash algorithm, and encrypt a first private key using a personal public key of a current user;
a storage module 304 configured to store the encrypted data in the distributed file system, the hash value and the encrypted first private key being stored in the blockchain as transaction information.
In this embodiment, optionally, the encryption module is further configured to:
when transferring assets, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the encrypted first private key by using the personal private key of the current user, and the encrypted first private key is added to the transaction information and stored in the block chain after being encrypted by using the personal public key of the asset transfer receiver.
In this embodiment, optionally, the apparatus further includes:
the inquiry module is configured to use the personal private key of the inquiry module to inquire the transaction information in the block chain when the current user or the receiver initiates an inquiry request after the transaction of the asset transfer is completed; or configured to use the private key to query transaction information in the blockchain when an authorized third party initiates a query request after completion of a transaction for the asset transfer.
In this embodiment, optionally, the apparatus further includes:
a verification module configured to verify the legitimacy of the transfer asset transaction by way of a zero knowledge proof when an unauthorized user initiates a verification request.
In this embodiment, optionally, the distributed file system is a decentralized distributed file system or a centralized distributed file system.
The apparatus provided in this embodiment may perform the method provided in any of the above method embodiments, and details of the process are described in the method embodiments and are not described herein again.
The above apparatus provided in this embodiment creates an account for a current user in a blockchain, creates an asset under the account, where the asset corresponds to any type of data, randomly generates a pair of keys for encryption and decryption for the data, where the keys include a first public key and a first private key, encrypts the data using the first public key, generates a corresponding hash value for the encrypted data through a hash algorithm, encrypts the first private key using a personal public key of the current user, stores the encrypted data in a distributed file system, stores the hash value and the encrypted first private key as transaction information in the blockchain, so that the data does not need to be stored in the blockchain, the problem of inefficient and costly storage of the blockchain itself is solved, and the asset is any type of data, and is not limited to virtual currency, and various universal digital assets such as pictures, audio, video, code files and the like are supported, the limitation is overcome, and the application is wider. In addition, the problem of transferring complex assets is solved by storing the first private key used in data decryption in the transaction. Furthermore, privacy protection is carried out on the transaction address and the transaction amount through zero knowledge proof, the privacy problem caused by transparency of the block chain is solved, and privacy protection of related beneficiaries can be realized in the process of creating assets and transferring the assets.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Embodiments also provide a computing device, referring to fig. 4, comprising a memory 1120, a processor 1110 and a computer program stored in said memory 1120 and executable by said processor 1110, the computer program being stored in a space 1130 for program code in the memory 1120, the computer program, when executed by the processor 1110, implementing the method steps 1131 for performing any of the methods according to the invention.
The embodiment of the application also provides a computer readable storage medium. Referring to fig. 5, the computer readable storage medium comprises a storage unit for program code provided with a program 1131' for performing the steps of the method according to the invention, which program is executed by a processor.
The embodiment of the application also provides a computer program product containing instructions. Which, when run on a computer, causes the computer to carry out the steps of the method according to the invention.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed by a computer, cause the computer to perform, in whole or in part, the procedures or functions described in accordance with the embodiments of the application. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by a program, and the program may be stored in a computer-readable storage medium, where the storage medium is a non-transitory medium, such as a random access memory, a read only memory, a flash memory, a hard disk, a solid state disk, a magnetic tape (magnetic tape), a floppy disk (floppy disk), an optical disk (optical disk), and any combination thereof.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of blockchain data storage, comprising:
generating an account for a current user in a block chain, and creating assets under the account, wherein the assets correspond to any type of data;
randomly generating a pair of keys for encryption and decryption for the data, wherein the keys comprise a first public key and a first private key;
encrypting the data by using the first public key, generating a corresponding hash value for the encrypted data by a hash algorithm, and encrypting the first private key by using the personal public key of the current user;
storing the encrypted data in a distributed file system, and storing the hash value and the encrypted first private key as transaction information in a blockchain.
2. The method of claim 1, further comprising:
when the assets are transferred, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the first private key through the personal private key of the current user, and the first private key is added to the transaction information and stored in the block chain after being encrypted through the personal public key of the asset transfer receiver.
3. The method of claim 2, further comprising:
after the transaction of the asset transfer is completed, when the current user or the receiver initiates an inquiry request, inquiring the transaction information in a block chain by using a personal private key of the user or the receiver; or the like, or, alternatively,
after the transaction of the asset transfer is completed, when an authorized third party initiates an inquiry request, the transaction information is inquired in the blockchain using the private key.
4. The method of claim 2, further comprising:
when an unauthorized user initiates an authentication request, the legitimacy of the transfer asset transaction is verified by way of zero knowledge proof.
5. The method of any of claims 1-4, wherein the distributed file system is a decentralized distributed file system or a centralized distributed file system.
6. An apparatus for blockchain data storage, comprising:
the system comprises a creating module, a judging module and a processing module, wherein the creating module is configured to generate an account for a current user in a block chain, and create an asset under the account, and the asset corresponds to any type of data;
a generation module configured to randomly generate a pair of keys for encryption and decryption for the data, including a first public key and a first private key;
an encryption module configured to encrypt the data using the first public key, generate a corresponding hash value for the encrypted data through a hash algorithm, and encrypt the first private key using the personal public key of the current user;
a storage module configured to store the encrypted data in a distributed file system, the hash value and the encrypted first private key being stored as transaction information in a blockchain.
7. The apparatus of claim 6, wherein the encryption module is further configured to:
when the assets are transferred, the encrypted first private key is obtained from the block chain, the first private key is obtained by decrypting the first private key through the personal private key of the current user, and the first private key is added to the transaction information and stored in the block chain after being encrypted through the personal public key of the asset transfer receiver.
8. The apparatus of claim 7, further comprising:
a query module configured to query the transaction information in a blockchain using its own personal private key when the current user or the recipient initiates a query request after the transaction of the asset transfer is completed; or configured to use a private key to query the transaction information in a blockchain when an authorized third party initiates a query request after completion of a transaction of the asset transfer.
9. The apparatus of claim 7, further comprising:
a verification module configured to verify the legitimacy of the transfer asset transaction by way of a zero knowledge proof when an unauthorized user initiates a verification request.
10. The apparatus of any of claims 6-9, wherein the distributed file system is a decentralized distributed file system or a centralized distributed file system.
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| CN202010136128.6A CN113342802A (en) | 2020-03-02 | 2020-03-02 | Method and device for storing block chain data |
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| CN202010136128.6A CN113342802A (en) | 2020-03-02 | 2020-03-02 | Method and device for storing block chain data |
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