CN111327591A - Data transmission method, system and storage medium based on block chain - Google Patents
Data transmission method, system and storage medium based on block chain Download PDFInfo
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- CN111327591A CN111327591A CN202010059151.XA CN202010059151A CN111327591A CN 111327591 A CN111327591 A CN 111327591A CN 202010059151 A CN202010059151 A CN 202010059151A CN 111327591 A CN111327591 A CN 111327591A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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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)
- H04L9/0825—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) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
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Abstract
The invention discloses a data transmission method, a data transmission system and a storage medium based on a block chain, wherein data to be transmitted are divided into first data and second data, the first data comprise safe transmission certificate information of user privacy, and the second data are mass data except the first data in the data to be transmitted; according to the invention, the first data is transmitted from the data sending node to the data receiving node by utilizing the safety of the block chain technology, so that the safe transmission of the first data is ensured, and the safety is high; meanwhile, the public network is utilized to transmit the second data from the data sending node to the data receiving node, so that the transmission of mass data is realized, the cost is low, and the method can be widely applied to the technical field of block chains.
Description
Technical Field
The present invention relates to the field of block chain technology, and in particular, to a data transmission method, system and storage medium based on a block chain.
Background
The transmission of mass data in a computer network is a key step in many information technology application scenarios, generally requiring the security of the transmission process, and ensuring that the data transmission is not monitored and intercepted and the data cannot be forged. In the existing technical scheme, in order to ensure security, a dedicated line is often required to be established for security data transmission between two nodes. However, when the amount of data to be transmitted is large, the cost of establishing or leasing a dedicated line is too high to be feasible from an economic point of view. A more economically viable solution is to transmit large volumes of data over public networks. However, data transmission through a public network has a problem of poor security, and data transmission in the public network is easily invaded by a third party and may be monitored, intercepted or forged, so that security of data transmission is not well guaranteed.
Existing methods for large-batch data transmission are mainly classified into two categories. The first type is to ensure the security of data transmission by establishing a dedicated line between a sending node and a receiving node. The main disadvantage of this method is that the cost of renting or self-establishing dedicated lines is too high, and it is not suitable for mass data transmission from the economic point of view. The second method is mainly to transmit data through a public network. The method has low transmission cost, but has the disadvantages of poor security, easy interception, interception or forgery of data in the transmission process of the public network, and is not suitable for data transmission with high security requirement.
Disclosure of Invention
In view of this, embodiments of the present invention provide a block chain-based data transmission method, system and storage medium with low cost and high security.
A first aspect of the present invention provides a data transmission method based on a block chain, where the method is applied to a data sending node, and includes:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
and uploading second data of the data to be transmitted to a storage space through a public computer network, so that the data receiving node downloads the second data from the storage space address.
A second aspect of the present invention provides a data transmission method based on a block chain, where the method is applied to a data receiving node, and includes:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
and downloading second data of the data to be transmitted from the storage space address according to the decryption information.
A third aspect of the present invention provides a data transmission method based on a block chain, including:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
encrypting first data of the data to be transmitted through a data sending node according to the first public key to obtain first encryption information;
sending the first public key, the first block chain address, the storage space address and the first encryption information to a data receiving node through a block chain network;
decrypting the received first encrypted information through a data receiving node according to the second private key to obtain first data of the data to be transmitted and generate feedback information;
encrypting the feedback information through a data receiving node according to the first private key to obtain second encrypted information;
according to the received first block chain address, the second public key, the second block chain address and second encryption information are sent to a data sending node through a data receiving node;
uploading second data of the data to be transmitted to a storage space by the data sending node through a public computer network;
and downloading the second data from the storage space address through a data receiving node according to the decryption information.
A fourth aspect of the present invention provides a data transmission system based on a block chain, including:
the determining module is used for determining a first public key, a first private key, a first block chain address and a storage space address of the data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
the first encryption module is used for encrypting first data of data to be transmitted through the data sending node according to the second public key to obtain first encryption information;
the first transmission module is used for transmitting the first encryption information to a data receiving node through a block chain network;
the first decryption module is used for decrypting the received first encrypted information through the data receiving node according to the second private key to obtain decrypted information and generate feedback information;
the second encryption module is used for encrypting the feedback information through a data receiving node according to the first public key to obtain second encryption information;
the feedback module is used for sending second encryption information to the data sending node through the data receiving node according to the first block chain address;
the second transmission module is used for uploading second data of the data to be transmitted to the storage space through the public computer network by the data sending node;
and the downloading module is used for downloading the second data from the storage space address through the data receiving node according to the decryption information.
A fifth aspect of the present invention provides a data transmission system based on a block chain, including a data sending node and a data receiving node;
wherein the data transmitting node is configured to:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
uploading second data of the data to be transmitted to a storage space through a public computer network, so that a data receiving node downloads the second data from the storage space address;
the data receiving node is configured to:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
and downloading second data of the data to be transmitted from the storage space address according to the decryption information.
A sixth aspect of the present invention provides a data transmission system based on a block chain, including:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method.
A seventh aspect of the invention provides a storage medium having stored therein processor-executable instructions for performing the method when executed by a processor.
One or more of the above-described embodiments of the present invention have the following advantages: the embodiment of the invention divides the data to be transmitted into first data and second data, wherein the first data comprises the safe transmission certificate information of user privacy, and the second data is mass data except the first data in the data to be transmitted; according to the invention, the first data is transmitted from the data sending node to the data receiving node by utilizing the safety of the block chain technology, so that the safe transmission of the first data is ensured, and the safety is high; meanwhile, the public network is utilized to transmit the second data from the data sending node to the data receiving node, so that the transmission of mass data is realized, and the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a data transmission framework according to an embodiment of the present application;
FIG. 2 is a block chain address generation and public key transmission process in accordance with an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a first data transmission step according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a second data transmission step according to an embodiment of the present application.
Detailed Description
The invention will be further explained and explained with reference to the drawings and the embodiments in the description. The step numbers in the embodiments of the present invention are set for convenience of illustration only, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.
Aiming at the problems of poor safety and high cost in data transmission in the prior art, the method aims to provide a large-batch data transmission scheme based on a public network and capable of ensuring safety through a block chain technology. Firstly, the blockchain has the characteristics of openness and capability of authenticating and authorizing data by all nodes, and is very suitable for ensuring the security of data transmission. However, as a distributed account book technology, the cost of data reading, writing and storing is high, and the block chain is not suitable for directly transmitting large-batch data. The core of the method of the invention is mainly divided into two parts. The first part of the operation is to extract security transmission credential information of mass data transmission, and the security transmission credential information mainly comprises security-related information such as data encryption passwords, user name passwords transmitted or stored in cloud, and the like. The key to secure transmission of data then translates into ensuring secure transmission of the secure transmission credential information. The second part is mainly used for transmitting the safe transmission certificate information through a block chain system, and the asymmetric encryption principle of the block chain is utilized to ensure that the safe transmission certificate information can only be known by a sending point and a receiving point, and any third party cannot monitor or intercept the safe transmission certificate information. The process mainly authenticates and certifies the identity of the data sending point, the data receiving point and the temporary storage node in the public network, so that the data are not monitored and intercepted by a third party, and the security of data transmission between the nodes subjected to the certificating and verification is greatly improved.
The embodiment of the present application first introduces a block chain system framework for data transmission, as shown in fig. 1, a data sending node 100 transmits data to a data receiving node 101 via a public computer network 102. In this embodiment, the data sending and receiving nodes may be two different nodes in the computer network, or different virtual machines of the same node. The public computer network in this example comprises a blockchain network. Block chain networks referred to herein include, but are not limited to, public chains, private chains, alliance chains, and the like. The data sending node 100 and the receiving node 101 comprise a data sending program 110 and a data receiving program 111, respectively, for enabling transmission of data over a public computer network. In addition, the data sending program and the data receiving program each include a blockchain transmission module 121 and 122 for securely transmitting the credential information. The two modules enable secure transmission of credential information (including blockchain addresses, encryption passwords, username passwords for cloud storage or other temporary storage space, etc.) over blockchain networks. The block chain system for data transmission provided by the invention comprises the following three parts, namely generation of a block chain address and public key transmission, a block chain transmission system for safely transmitting certificate information and a transmission process of mass data.
Fig. 2 shows a specific process of generating a blockchain address and transmitting a public key, and in modules 201 and 202, a data sending node and a receiving node respectively generate a public key and a blockchain address. The private key K1 (i.e., the first private key) of the sending node and the private key K2 (i.e., the second private key) of the receiving node are respectively kept in good care and are not known by a third party. The private key is mainly used to decrypt information encrypted by the public key. The core principle of the block chain asymmetric encryption method is that the encrypted information can be decrypted only by having a private key, and a third party without the private key can not obtain the encrypted information. The data transmitting node transmits its own public key PK1 (i.e., the first public key) and the blockchain address a1 (i.e., the first blockchain address) to the data receiving node, and the data receiving node also transmits its own public key PK2 (i.e., the second public key) and the blockchain address a2 (i.e., the second blockchain address) to the data receiving node. Then both sides know the public key and the address of the other side, so that the public key of the other side can be used for encrypting the safe transmission certificate information, the encrypted safe transmission certificate information is sent to the block chain address of the other side through the block chain network, and the safe transmission certificate information cannot be monitored, intercepted, forged or tampered by a third side.
In addition, fig. 3 shows a block chain transmission system of first data, in block 301, a data sending node performs sensitive data extraction on data to be sent to obtain the first data, which mainly includes a password for data encryption, a username and a password for cloud storage or a temporary storage space, and the like. The data sending node then packages the secure transmission credential information set (M), its own blockchain address (a1) and the current blockchain information into an information set (I). In block 302, the data transmitting node encrypts the packaged information set (I) with the public key (PK2) of the other party to obtain first encrypted information, and transmits the encrypted first encrypted information to the blockchain address of the data receiving node through the blockchain network (a 2). The data receiving node then receives the encrypted information set (I) and decrypts it with the private key (K2) to obtain the original information set (I) in block 303. And after the decryption is finished, the data receiving node generates feedback information, wherein the feedback information is a variable of 0-1 and is used for feeding back whether the safety transmission certificate information is successfully received. In block 304, the data receiving node encrypts the feedback information with the sending node's public key (PK1) and transmits to the sending node's blockchain address (A1). This process ensures that the feedback information cannot be intercepted or tampered with by a third party. In block 305, the sending and receiving receives the feedback information and decrypts it with its own private key to obtain the original feedback information. If the module 306 determines the fork, if the feedback information is successful, the process goes to the module 307 (the transmission of the secure transmission credential information is finished); if the transmission is unsuccessful, the module 301 is re-entered to perform the next transmission of the secure transmission credential information.
The embodiment of the present application illustrates a transmission process of the second data by using fig. 4. In the block chain system-based safe transmission process of the large-batch data, in a module 401, a data sending node uploads the large-batch data (namely, second data) to be transmitted to a designated cloud storage or other temporary storage spaces through a public computer network according to key safety information such as an encryption mode, a cloud storage or temporary storage address, a user name and a password formulated by a safe transmission certificate information set (M). Then, in block 402, the receiving node downloads the data uploaded by the sending node through the public computer network according to the information such as the address, username, and password specified by the secure transmission credential information set (M) obtained by the flow of fig. 3. And executing the deleting operation after the downloading is finished. The data receiving node then generates feedback information (F), encrypts with the public key PK1 of the sending node to obtain second encrypted information, and transmits the second encrypted information to the blockchain address a1 of the sending node, in block 403. The sending node receives the encrypted feedback information in block 404 and decrypts it using its own private key K1 to obtain the original feedback information (F). In the decision block of 405, if the feedback information is successful, the process goes to block 406 to indicate that the data transmission is completed; otherwise, the process returns to the block 401 to perform the next data transmission process.
To sum up, the embodiment of the present application provides implementation steps applied to a data sending node, including the following steps:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
and uploading second data of the data to be transmitted to a storage space through a public computer network, so that the data receiving node downloads the second data from the storage space address. The first data includes but is not limited to an encryption password and an account password of a storage space address; the storage space includes, but is not limited to, a cloud storage space, a mobile storage space, and a fixed storage space.
Decrypting second encrypted information fed back by the data receiving node through the first private key to obtain feedback information;
determining whether the first data is successfully sent to the data receiving node according to the feedback information, if so, not sending the first data to the data receiving node; otherwise, the first data is continuously sent to the data receiving node.
In addition, the embodiment of the present application further provides an implementation step applied to a data receiving node, including the following steps:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
downloading second data of the data to be transmitted from the storage space address according to the decryption information;
and deleting the second data from the storage space address.
The application also provides a data transmission method based on the block chain, which comprises the following steps:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
encrypting first data of the data to be transmitted through a data sending node according to the first public key to obtain first encryption information;
sending the first public key, the first block chain address, the storage space address and the first encryption information to a data receiving node through a block chain network;
decrypting the received first encrypted information through a data receiving node according to the second private key to obtain first data of the data to be transmitted and generate feedback information;
encrypting the feedback information through a data receiving node according to the first private key to obtain second encrypted information;
according to the received first block chain address, the second public key, the second block chain address and second encryption information are sent to a data sending node through a data receiving node;
uploading second data of the data to be transmitted to a storage space by the data sending node through a public computer network;
and downloading the second data from the storage space address through a data receiving node according to the decryption information.
An embodiment of the present application further provides a data transmission system based on a block chain, including:
the determining module is used for determining a first public key, a first private key, a first block chain address and a storage space address of the data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
the first encryption module is used for encrypting first data of data to be transmitted through the data sending node according to the second public key to obtain first encryption information;
the first transmission module is used for transmitting the first encryption information to a data receiving node through a block chain network;
the first decryption module is used for decrypting the received first encrypted information through the data receiving node according to the second private key to obtain decrypted information and generate feedback information;
the second encryption module is used for encrypting the feedback information through a data receiving node according to the first public key to obtain second encryption information;
the feedback module is used for sending second encryption information to the data sending node through the data receiving node according to the first block chain address;
the second transmission module is used for uploading second data of the data to be transmitted to the storage space through the public computer network by the data sending node;
and the downloading module is used for downloading the second data from the storage space address through the data receiving node according to the decryption information.
The embodiment of the application also provides a data transmission system based on the block chain, which comprises a data sending node and a data receiving node;
wherein the data transmitting node is configured to:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
uploading second data of the data to be transmitted to a storage space through a public computer network, so that a data receiving node downloads the second data from the storage space address;
the data receiving node is configured to:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
and downloading second data of the data to be transmitted from the storage space address according to the decryption information.
An embodiment of the present application further provides a data transmission system based on a block chain, including:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method.
Embodiments of the present application also provide a storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform the method.
In summary, the present invention extracts the information related to the authentication and the authorization of the encryption password, the transmission or temporary storage node of the bulk data to form the secure transmission certificate information for secure transmission. The magnitude of the secure transmission of credential information involved is typically much smaller than the magnitude of the data to be transmitted. The invention utilizes the asymmetric encryption principle of the block chain to transmit the safe transmission certificate information, and ensures that any third party cannot monitor, intercept or forge the safe transmission certificate information. The invention also establishes public network connection of mass data according to the security transmission certificate information such as encryption passwords, stored user name passwords and the like transmitted by the block chain, and performs right confirmation on the connection nodes to ensure the transmission security.
The invention greatly improves the safety of transmitting mass data in a public network under the condition of ensuring low cost, and can be widely used for data transmission of the Internet of things. On one hand, the transmission of mass data is still carried out through a public network or a cloud network, so that the transmission cost is low. On the other hand, the block chain is used for transmitting the safe transmission certificate information involved in the transmission process, and the authentication and the right confirmation are carried out on the connected nodes through the asymmetric encryption principle, so that the safety of data transmission is ensured.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the described functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The data transmission method based on the block chain is applied to a data sending node and comprises the following steps:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
and uploading second data of the data to be transmitted to a storage space through a public computer network, so that the data receiving node downloads the second data from the storage space address.
2. The blockchain-based data transmission method according to claim 1,
the first data includes but is not limited to an encryption password and an account password of a storage space address;
the storage space includes, but is not limited to, a cloud storage space, a mobile storage space, and a fixed storage space.
3. The method for block chain based data transmission according to claim 1, further comprising:
decrypting second encrypted information fed back by the data receiving node through the first private key to obtain feedback information;
determining whether the first data is successfully sent to the data receiving node according to the feedback information, if so, not sending the first data to the data receiving node; otherwise, the first data is continuously sent to the data receiving node.
4. The data transmission method based on the block chain is applied to a data receiving node and comprises the following steps:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
and downloading second data of the data to be transmitted from the storage space address according to the decryption information.
5. The blockchain-based data transmission method according to claim 4, further comprising:
and deleting the second data from the storage space address.
6. The data transmission method based on the block chain is characterized by comprising the following steps:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
encrypting first data of the data to be transmitted through a data sending node according to the first public key to obtain first encryption information;
sending the first public key, the first block chain address, the storage space address and the first encryption information to a data receiving node through a block chain network;
decrypting the received first encrypted information through a data receiving node according to the second private key to obtain first data of the data to be transmitted and generate feedback information;
encrypting the feedback information through a data receiving node according to the first private key to obtain second encrypted information;
according to the received first block chain address, the second public key, the second block chain address and second encryption information are sent to a data sending node through a data receiving node;
uploading second data of the data to be transmitted to a storage space by the data sending node through a public computer network;
and downloading the second data from the storage space address through a data receiving node according to the decryption information.
7. A block chain based data transmission system, comprising:
the determining module is used for determining a first public key, a first private key, a first block chain address and a storage space address of the data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
the first encryption module is used for encrypting first data of data to be transmitted through the data sending node according to the second public key to obtain first encryption information;
the first transmission module is used for transmitting the first encryption information to a data receiving node through a block chain network;
the first decryption module is used for decrypting the received first encrypted information through the data receiving node according to the second private key to obtain decrypted information and generate feedback information;
the second encryption module is used for encrypting the feedback information through a data receiving node according to the first public key to obtain second encryption information;
the feedback module is used for sending second encryption information to the data sending node through the data receiving node according to the first block chain address;
the second transmission module is used for uploading second data of the data to be transmitted to the storage space through the public computer network by the data sending node;
and the downloading module is used for downloading the second data from the storage space address through the data receiving node according to the decryption information.
8. The data transmission system based on the block chain is characterized by comprising a data sending node and a data receiving node;
wherein the data transmitting node is configured to:
determining a first public key, a first private key, a first block chain address and a storage space address of a data sending node; and determining a second public key and a second blockchain address of the data receiving node;
encrypting first data of data to be transmitted according to the second public key to obtain first encryption information;
sending the first encryption information to a data receiving node through a block chain network;
uploading second data of the data to be transmitted to a storage space through a public computer network, so that a data receiving node downloads the second data from the storage space address;
the data receiving node is configured to:
determining a first public key and a first block chain address of a data sending node; determining a second public key, a second private key and a second block chain address of the data receiving node;
decrypting the received first encrypted information according to the second private key to obtain first data of the data to be transmitted and generating feedback information;
encrypting the feedback information according to the first public key to obtain second encrypted information;
according to the first block chain address, sending the second public key, the second block chain address and second encryption information to a data sending node;
and downloading second data of the data to be transmitted from the storage space address according to the decryption information.
9. A block chain based data transmission system, comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement the method of any one of claims 1-6.
10. A storage medium having stored therein processor-executable instructions, which when executed by a processor, are for performing the method of any one of claims 1-6.
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