WO2020232800A1

WO2020232800A1 - Data processing method and system in block chain network and related device

Info

Publication number: WO2020232800A1
Application number: PCT/CN2019/094554
Authority: WO
Inventors: 辛佳骏
Original assignee: 深圳市网心科技有限公司
Priority date: 2019-05-17
Filing date: 2019-07-03
Publication date: 2020-11-26
Also published as: CN110290108B; CN110290108A

Abstract

A data processing method and system in a block chain network, and a related device, for saving network bandwidth in a block chain network data transmission process. The method provided by embodiments of the present application may comprise: receiving verified target signature data and obtaining a message original text parameter corresponding to the target signature data, the target signature data being data obtained by performing encryption operation on message original text by using a public key of a target user; obtaining an algorithm parameter corresponding to the public key of the target user, the algorithm parameter being used for indicating an asymmetric encryption algorithm used in a public key calculation process of the target user and a calculation parameter required for realizing the corresponding asymmetric encryption algorithm; and calculating the public key of the target user according to the target signature data, the algorithm parameter, and the message original text parameter, and storing the calculated public key of the target user in a local block chain node device.

Description

Data processing method, system and related equipment in blockchain network

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on May 17, 2019, the application number is 201910414781.1, and the invention title is "a method, system and related equipment for data processing in a blockchain network". The entire content is incorporated into this application by reference.

Technical field

The invention relates to the field of blockchain data processing, and in particular to a data processing method, system and related equipment in a blockchain network.

Background technique

In the blockchain network, when there is new transaction information, it is often necessary for the target user to use the private key to digitally sign the new transaction information to generate signature data, and then in the process of blockchain network data synchronization, it is often necessary to use the target The user's public key verifies the signed data.

For example, after blockchain network node A signs its own information with a private key, it will send the original information and the corresponding signature to node B, and node B will use node A's public key to verify the signature. In the existing blockchain network, the third-party node C (millions of nodes) needs to obtain a verified signature and the public key of node A when synchronizing data, then user B needs to send the verified signature And node A public key to node C. For example, the length of the public key in actual use is about 256 bits, and the length of the signature is 512 bits. If all transmissions require 768 bits of data, the length of the public key occupies 33% of the bandwidth.

With the rapid growth of the number of blockchain nodes, the network bandwidth occupied during the blockchain network transmission process is increasing. How to reduce the bandwidth occupation in the blockchain network and save network resources has become an unavoidable problem.

Summary of the invention

The main purpose of the present invention is to provide a data processing method, system and related equipment in a blockchain network, which are used to save network bandwidth in the process of data transmission in the blockchain network.

To achieve the foregoing objective, the first aspect of the embodiments of the present invention provides a data processing method in a blockchain network, which is applied to a blockchain node device, and the method includes:

Receiving the target signature data that has passed the verification and obtaining the original message parameters corresponding to the target signature data, where the target signature data is data obtained after the original message is encrypted using the public key of the target user;

Acquiring algorithm parameters corresponding to the public key of the target user, where the algorithm parameters are used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the calculation parameters required to implement the corresponding asymmetric encryption algorithm;

Calculate the public key of the target user according to the target signature data, algorithm parameters, and the original message parameters, and save the calculated public key of the target user in a local blockchain node device.

Optionally, as a possible real-time manner, in the embodiment of the present invention, if the target signature data is (r",s"), the algorithm parameters include the base point G of the elliptic curve used in the SM2 algorithm and The order of the base point is n, the original message parameter is the output value e of the cipher hash function applied to the original message or the original message M, according to the target signature data, algorithm parameters and the original message parameters Calculating the public key of the target user includes:

After converting the r" and s" into integers, calculate the parameter t according to the formula, where t=(r"+s") mod n;

Calculate the inverse element t ^{-1 of the} parameter t using a finite field inverse algorithm;

Calculate the s" times point [s"]G of the base point G on the elliptic curve;

Calculate the point U whose abscissa is (r"－e) on the elliptic curve;

Calculating the target user's public key according to the formula _{^{P A '= [t -1]}} (U- [s "] G).

Optionally, as a possible real-time manner, in the embodiment of the present invention, the obtaining the original message parameters corresponding to the target signature data includes:

Receive the original message M corresponding to the target signature data;

If the original message M conforms to the output format of the cryptographic hash function, the original message is used as the output value e; otherwise, the output value e is calculated by using the cryptographic hash function and the original message M.

Alternatively, as a possible real time, embodiments of the present invention, prior to calculating the target user's public key P _A ', the method may further comprise:

The step of checking said signature target data (r ", s") meets a first predetermined condition, if they meet a first predetermined condition, calculates the target user's public key P _A 'is;

The first preset condition includes at least one of the following conditions:

r"∈[1,n-1] is established, s"∈[1,n-1] is established, (r"+s") mod n=t is not zero, and the value of [t ^-1 ] mod n Not zero, the value of (r"－e)mod n is not zero.

Optionally, as a possible real-time manner, in the embodiment of the present invention, before saving the calculated public key of the target user in the local blockchain node device, the method may further include:

Check of the target user's public key P _A 'meets a second preset condition, if they meet the step of the local node device block chain of the target user to save the calculated public key is performed;

Said second predetermined condition comprises: the equation ^{_{([t -1] P A '}} + [s "] G) .x + e = r" mod n holds.

A second aspect of the embodiments of the present invention provides a data processing system in a blockchain network, which includes:

The receiving unit is configured to receive the target signature data that has passed the verification and obtain the original message parameters corresponding to the target signature data, where the target signature data is data obtained after the target user's public key is used to encrypt the original message;

The obtaining unit is used to obtain the algorithm parameter corresponding to the public key of the target user, and the algorithm parameter is used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the corresponding asymmetric encryption algorithm. Required calculation parameters;

The processing unit is configured to calculate the public key of the target user according to the target signature data, algorithm parameters and the original message parameters, and save the calculated public key of the target user on the local blockchain node device.

The third aspect of the embodiments of the present invention provides a blockchain node device. The blockchain node device includes a memory and a processor. The memory stores a computer program that can run on the processor. The computer When the program is executed by the processor, the method according to any one of claims 1-4 is realized.

Optionally, as a possible real-time manner, the blockchain node device in the embodiment of the present invention is a node forming a CDN network or a blockchain network.

A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and the computer program may be executed by one or more processors to implement the first aspect And the steps in the data processing method in the blockchain network in any possible implementation of the first aspect.

The fifth aspect of the embodiments of the present invention provides a computer program product, which includes computer instructions, which, when run on a computer, enables the computer to execute the first aspect and any one of the possible implementations of the first aspect. The steps in the data processing method in the chain network.

In the embodiment of the present invention, in the process of data synchronization, the blockchain node device can receive the verified target signature data and the original message parameters corresponding to the target signature data, and calculate according to the target signature data, algorithm parameters, and original message parameters The public key of the target user does not need to transmit the public key of the target user, which saves network bandwidth during data transmission.

Description of the drawings

Figure 1 is a schematic diagram of an embodiment of a blockchain-based data processing method in an embodiment of the present invention;

2 is a schematic diagram of an embodiment of a data processing system based on blockchain in an embodiment of the present invention;

Figure 3 is a schematic diagram of an embodiment of a blockchain node device in an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

It should be noted that the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. . Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that this combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

The asymmetric encryption algorithm uses two completely different but completely matched pairs of keys—public key and private key. When using an asymmetric encryption algorithm to encrypt files, only a matching pair of public and private keys can be used to complete the process of encrypting and decrypting the plaintext. The public key is used to encrypt the plaintext, and the private key can be used to decrypt the ciphertext, and the sender (encryptor) knows the public key of the recipient, and only the recipient (decrypter) is the only one who knows his private key people. The basic principle of the asymmetric encryption algorithm is that if the sender wants to send encrypted information that only the receiver can decode, the sender uses the receiver's public key to encrypt the letter, and the receiver uses his own private key to decrypt the letter. Obviously, using an asymmetric encryption algorithm, before the sender and receiver communicate, the receiver must send its own randomly generated public key to the sender, while retaining the private key. Since the asymmetric algorithm has two keys, it is especially suitable for data encryption in distributed systems. Widely used asymmetric encryption algorithms include the RSA algorithm, the DSA proposed by the National Bureau of Standards, and the SM2 elliptic curve public key encryption algorithm. For ease of understanding, the embodiment of the present invention mainly uses the SM2 elliptic curve public key encryption algorithm as an example for illustration .

In the process of data synchronization, the existing blockchain network needs to send the signature data, public key, and original message corresponding to the target signature data to the next node. In the embodiment of the present invention, the block chain node device can derive the public key through the signature data, and there is no need to transmit the public key during the transmission process, thereby saving bandwidth. For example, the length of the public key is about 256 bits, and the length of the signature is 512 bits. If all transmissions require 768 bits of data, and if only 512 bits of data are required to transmit signatures, 33% of the bandwidth can be saved.

For ease of understanding, the following describes the specific process in the embodiment of the present invention. Please refer to Figure 1. An embodiment of the data processing method in the blockchain network in the embodiment of the present invention includes:

101. Receive the target signature data that has passed the verification and obtain the original message parameters corresponding to the target signature data;

In the embodiment of the present invention, the target user's blockchain node device A stores a key (including the public key and the private key) generated based on the SM2 elliptic curve public key cryptographic algorithm. When the blockchain node device A obtains the original message After M (transaction information), the private key in the key generated based on the SM2 elliptic curve public key cryptographic algorithm can be used to calculate the original message M to obtain the signature data (r, s), which can be the signature data (r, s) Send to other node B for verification. Node B can verify the received signature data (r', s') based on the public key of the target user. It is understandable that a separate node can be set in the embodiment of the present invention. To verify the received signature data (r', s'), you can also directly select one or more nodes (less than all blockchain nodes) in the blockchain network to verify the received signature data (r' ,s') for verification. After the verification is successful, the target signature data (r",s") that has passed the verification and the original message parameters corresponding to the target signature data are sent to other node devices in the blockchain network. The node device in the blockchain network can receive the verified target signature data and the original message parameters corresponding to the target signature data.

It is understandable that if there is no data damage during the transmission process, the data (r,s), (r',s'), (r",s") are the same data.

102. Obtain algorithm parameters corresponding to the public key of the target user;

In order to calculate the public key of the target user, the node device in the blockchain network needs to obtain the asymmetric encryption algorithm used in the calculation process of the target user's public key and the calculation parameters required to realize the corresponding asymmetric encryption algorithm, namely the algorithm parameters . The acquisition of the algorithm parameters can be transmitted through the previous node, or can be pre-stored in the local storage space of each node device in the blockchain network during the client installation process, and extracted from the local storage space without network transmission.

103. Calculate the target user's public key according to the target signature data, algorithm parameters, and message original text parameters, and save the calculated target user's public key on the local blockchain node device.

After obtaining the target signature data, algorithm parameters, and message original text parameters, the corresponding algorithm can be derived according to the characteristics of the adopted asymmetric encryption algorithm to calculate the public key of the target user.

Specifically, only the SM2 elliptic curve public key cryptographic algorithm is taken as an example for description.

If the verified target signature data received by the node is (r",s"), the algorithm parameters include the base point G of the elliptic curve used in the SM2 algorithm and the order of the base point is n, and the original message parameters are cryptographic hash functions. Based on the output value e of the original message M, calculating the public key of the target user based on the target signature data, algorithm parameters and the original message parameters include:

After converting r "and s" into integers, calculate the parameter t according to the formula, where t = (r "+ s ") mod n;

Calculate the base point G at the s" times point [s"]G of the elliptic curve;

Calculate the point U whose abscissa is (r"－e) on the elliptic curve;

According to the formula, calculate the target user's public key P _A '=[t ^-1 ](U－[s》]G).

It should be noted that the node may directly receive the cryptographic hash function sent by other nodes (node B) to act on the output value e of the original message M, and it can directly use e to calculate the public key; if the node does not receive the above output value e, but if the original message M is obtained, there are two cases to deal with: 1. The output value e can be calculated using the cryptographic hash function; 2. If the original message M conforms to the output format of the hash function, the original message M can also be Used as the output value e.

Specifically, the finite field inverse calculation algorithm and the point doubling algorithm of the elliptic curve can refer to the solutions in the prior art, which will not be repeated here. In actual application, there can be multiple points with abscissa (r"-e) on the elliptic curve. In specific applications, a specific U can be pre-designated from multiple points with abscissa (r"-e) in the algorithm parameters. point.

In the embodiment of the present invention, in the process of data synchronization, the blockchain node device can receive the verified target signature data and the original message parameters corresponding to the target signature data, and calculate according to the target signature data, algorithm parameters, and original message parameters The public key of the target user does not need to transmit the public key of the target user, which saves network bandwidth during data transmission. Especially in a blockchain network with a huge number of blockchain nodes (millions), network bandwidth resources are greatly saved.

Optionally, as a possible implementation manner, in order to ensure the accuracy of the data, before calculating the public key P _A 'of the target user, the received data needs to be verified, which may specifically include:

Verifying that the signature target data (r ", s") corresponds to the first preset condition, if they meet a first predetermined condition, calculating the target user's public key P _A 'steps are carried out; in particular, corresponds to the first predetermined Conditions can include:

In the embodiment of the present invention, after the public key of the target user is calculated back, if the calculated public key of the target user can pass the original signature verification, it can be explained that the calculation steps in the foregoing embodiment are correct. Optionally, as a possible implementation manner, in order to ensure the accuracy of the data, before saving the calculated public key of the target user in the local blockchain node device, the method further includes:

Check whether the public key P _A 'of the target user meets the second preset condition, and if so, execute the step of saving the calculated public key of the target user in the local blockchain node device;

The second predetermined condition comprises: the equation ^{_{([t -1] P A '}} + [s "] G) .x + e = r" mod n holds.

According to the SM2 elliptic curve public key cryptographic algorithm published by the State Cryptography Administration, in the signature verification algorithm, ([t ^-1 ]P _A +[s]G).x+e={[t][t ^-1 ]( U－[s]G)+[s]G}.x+e mod n

= {(U+[s]G)－[s]G}.x+e mod n

=U.x+emod n=r－e+emod n=r mod n

Therefore, it is only necessary to verify whether the equation ([t ^-1 ]P _A ’+[s”]G). x+e=r” mod n is established, if it is established, it can be verified that the calculation in the above embodiment The steps are correct.

In order to facilitate understanding, the data processing method in the blockchain network in this application will be described below in conjunction with specific application examples.

User A generates a private key and corresponding public key. For their own private key secret, the public key P _A publicly. The private key can be used to generate the signature, and the public key can be used to verify the signature. P requires public synchronized to their own user authentication information _A later generation B. When user A uses the private key to sign his own information, the original message and the corresponding signature (r, s) will be sent to user B, and user B uses user A’s public key to sign the received signature (r',s' )authenticating. User C only needs to verify the target signature data (r",s") sent by user B, the base point G of the elliptic curve and the order of the base point used in the SM2 algorithm are n, and the cryptographic hash function acts on the original message The output value e or the original message M is pushed back to calculate the public key PA' of the target user. The specific calculation process is as follows:

C1: Check whether r"∈[1, n－1] is established, if not, exit the operation;

C2: Check whether s"∈[1, n-1] is established, if not, then exit the operation;

C3: Calculation, if (r"+s") mod n=t=0, then exit the calculation;

C4: The calculation uses the finite field inverse algorithm to calculate the inverse element t-1 of the parameter t, and verify whether the value of [t-1]mod n is zero, if it is zero, exit the calculation;

C5: Verify whether the value of (r"－e)mod n is zero, if it is zero, then exit the calculation;

C6: Find the points U and U′ on the elliptic curve. The x coordinates of U and U′ points are equal to (r〞－e), and the y coordinate is symmetrical about the y axis, which can be specified by additional parameters according to specific business requirements Use U and U′;

C7: Calculate multiple points on the elliptic curve [s》]G;

C8: Calculate the point U－[s》]G on the elliptic curve;

C9: Calculate the public key PA'=[t-1](U－[s》]G).

In the embodiment of the present invention, by designing an algorithm that can push back the public key based on the verified signature, the communication volume is greatly reduced and the bandwidth is reduced. Especially in the blockchain scenario, each verified transaction is a signature, and the user's wallet address depends on the public key address. In the transaction confirmation process, both the confirmation of the transaction and the wallet address are often required. Introducing the public key address based on the signature can greatly reduce the amount of communication and reduce the transaction confirmation time and network bandwidth resources of the blockchain.

Please refer to Fig. 2. In this embodiment, a data processing system in a blockchain network is also provided, which includes:

The receiving unit 201 is configured to receive the target signature data that has passed the verification and obtain the original message parameters corresponding to the target signature data. The target signature data is data obtained after the original message is encrypted using the public key of the target user;

The obtaining unit 202 is configured to obtain the algorithm parameters corresponding to the public key of the target user, and the algorithm parameters are used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the calculation parameters required to realize the corresponding asymmetric encryption algorithm;

The processing unit 203 is configured to calculate the public key of the target user according to the target signature data, algorithm parameters, and original message parameters, and save the calculated public key of the target user on the local blockchain node device.

Optionally, as a possible implementation, if the target signature data is (r", s"), the algorithm parameters include the base point G of the elliptic curve used in the SM2 algorithm and the order of the base point is n, and the original message parameters In order for the cryptographic hash function to act on the output value e of the original message or M, the processing unit includes:

The first calculation module is used to calculate the parameter t according to the formula after converting r" and s" into integers, where t=(r"+s") mod n;

The second calculation module is used to calculate the inverse element t ^{-1 of the} parameter t using a finite field inverse operation algorithm;

The third calculation module is used to calculate the s" multiple point [s"]G of the base point G on the elliptic curve;

The fourth calculation module is used to calculate the point U with the abscissa (r"－e) on the elliptic curve;

A fifth calculating means for calculating the target user's public key according to the formula _{^{P A '= [t -1]}} (U- [s "] G).

Optionally, as a possible implementation manner, before calculating the public key P _A 'of the target user, the system further includes:

First check means for checking the signature target data (r ", s") meets a first predetermined condition, if they meet the first preset condition, the step of calculating the target user's public key P _A 'is carried out;

Meeting the first preset condition includes:

Optionally, as a possible implementation, before saving the calculated public key of the target user in the local blockchain node device, the system further includes:

The second verification unit is used to verify whether the public key P _A 'of the target user meets the second preset condition, and if so, execute the step of saving the calculated public key of the target user in the local blockchain node device; second preset condition is met comprises: equation ^{_{([t -1] P A '}} + [s "] G) .x + e = r" mod n holds.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

Please refer to Figure 3. In this embodiment, a blockchain node device is also provided. The blockchain node device 1 can be a PC (Personal Computer), or a smart phone, a tablet, a handheld computer, Portable computers, smart routers, mining machines, network storage equipment terminal equipment.

The blockchain node device 1 may be a node forming a CDN network or a blockchain network.

The blockchain node device 1 may include a memory 11, a processor 12, and a bus 13. When the processor 11 executes the computer program, the steps in the embodiment of the data processing method in the blockchain-based blockchain network shown in FIG. 1 are implemented, such as steps 101 to 103 shown in FIG. 1. Or, when the processor executes the computer program, the function of each module or unit in the foregoing device embodiments is realized.

In some embodiments of the present invention, the processor is specifically configured to implement the following steps:

Receive the verified target signature data and obtain the original message parameters corresponding to the target signature data. The target signature data is the data obtained after encrypting the original message with the public key of the target user;

Obtain the algorithm parameters corresponding to the public key of the target user, the algorithm parameters are used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the calculation parameters required to implement the corresponding asymmetric encryption algorithm;

Calculate the target user's public key according to the target signature data, algorithm parameters and message original text parameters, and save the calculated target user's public key on the local blockchain node device.

If the target signature data is (r",s"), the algorithm parameters include the base point G of the elliptic curve used in the SM2 algorithm and the order of the base point is n, and the original message parameter is the output value e of the cryptographic hash function applied to the original message Or the original message M. Optionally, in some embodiments of the present invention, the processor may also be used to implement the following steps:

Calculate the base point G at the s" times point [s"]G of the elliptic curve;

Calculate the point U whose abscissa is (r"－e) on the elliptic curve;

Optionally, in some embodiments of the present invention, the processor may also be used to implement the following steps:

Receive the original message M corresponding to the target signature data;

Verifying that the signature target data (r ", s") corresponds to the first preset condition, if they meet the first preset condition, the step of calculating the target user's public key P _A 'is carried out;

The first preset conditions include:

The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 11 may be an internal storage unit of the blockchain node device 1 in some embodiments, for example, the hard disk of the blockchain node device 1. In other embodiments, the memory 11 may also be an external storage device of the blockchain node device 1, such as a plug-in hard disk equipped on the blockchain node device 1, a smart media card (SMC), and a secure digital (Secure Digital, SD) card, Flash Card, etc. Further, the memory 11 may also include both an internal storage unit of the blockchain node device 1 and an external storage device. The memory 11 can be used not only to store application software and various data installed in the blockchain node device 1, such as the code of **program 01, etc., but also to temporarily store data that has been output or will be output.

The processor 12 may be a central processing unit (CPU), controller, microcontroller, microprocessor or other data processing chip in some embodiments, and is used to run the program code or processing stored in the memory 11 Data, such as executing **program 01, etc.

The bus 13 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used to represent in FIG. 10, but it does not mean that there is only one bus or one type of bus.

Further, the blockchain node device may also include a network interface 14. The network interface 14 may optionally include a wired interface and/or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is usually used in the blockchain The node device 1 establishes a communication connection with other electronic devices.

Optionally, the blockchain node device 1 may also include a user interface. The user interface may include a display (Display) and an input unit such as a keyboard (Keyboard). The optional user interface may also include a standard wired interface and a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode, organic light emitting diode) touch device, etc. Among them, the display can also be called a display screen or a display unit as appropriate, and is used to display the information processed in the blockchain node device 1 and to display a visualized user interface.

Figure 3 only shows the blockchain node device 1 with components 11-14 and the computer program 01. Those skilled in the art can understand that the structure shown in Figure 1 does not constitute a limitation on the blockchain node device 1. It may include fewer or more components than shown, or a combination of some components, or a different component arrangement.

The present invention also provides a computer-readable storage medium with a computer program stored on the computer-readable storage medium. When the computer program is executed by a processor, the following steps can be implemented:

Calculate the base point G at the s" times point [s"]G of the elliptic curve;

Calculate the point U whose abscissa is (r"－e) on the elliptic curve;

Receive the original message M corresponding to the target signature data;

Meeting the first preset condition includes:

Second preset condition is met comprises: Equation ^{_{([t -1] P A '}} + [s "] G) .x + e = r" mod n holds.

The embodiment of the present invention also provides a computer program product including one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention are generated in whole or in part. The computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to transmit to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or data center integrated with one or more available media. Available media can be magnetic media (for example, floppy disks, hard drives, tapes), optical media (for example, DVDs), or semiconductor media (for example, Solid State Disks (SSD)), etc.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

It should be noted that the sequence numbers of the above-mentioned embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments. And the terms "include", "include" or any other variants thereof in this article are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements not only includes those elements, but also includes The other elements listed may also include elements inherent to the process, device, article, or method. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, device, article or method that includes the element.

The above are only preferred embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technical fields , The same reason is included in the patent protection scope of the present invention.

Claims

A data processing method in a blockchain network, characterized in that it is applied to a blockchain node device, and the method includes:

Receiving the target signature data that has passed the verification and obtaining the original message parameters corresponding to the target signature data, where the target signature data is data obtained after the original message is encrypted using the public key of the target user;

Acquiring algorithm parameters corresponding to the public key of the target user, where the algorithm parameters are used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the calculation parameters required to implement the corresponding asymmetric encryption algorithm;

Calculate the public key of the target user according to the target signature data, the algorithm parameters, and the original message parameters, and save the calculated public key of the target user in a local blockchain node device.
The method of claim 1, wherein if the verified target signature data is (r",s"), the algorithm parameters include the base point G of the elliptic curve used in the SM2 algorithm and the The order of the base point is n, the original message parameter is the output value e of the cryptographic hash function acting on the original message, and the target user’s information is calculated based on the target signature data, algorithm parameters and the original message parameters The public key includes:

After converting the r" and s" into integers, calculate the parameter t according to the formula, where t=(r"+s") mod n;

Calculate the inverse element t -1 of the parameter t using a finite field inverse algorithm;

Calculate the s" times point [s"]G of the base point G on the elliptic curve;

Calculate the point U whose abscissa is (r"－e) on the elliptic curve;

Calculating the target user's public key according to the formula P A '= [t -1] (U- [s "] G).
The method according to claim 2, wherein said obtaining the original message parameters corresponding to the target signature data comprises:

Receive the original message M corresponding to the target signature data;

If the original message M conforms to the output format of the cryptographic hash function, the original message is used as the output value e; otherwise, the output value e is calculated by using the cryptographic hash function and the original message M.
The method according to claim 2, wherein, in calculating the target user's public key P A 'before, the method further comprising:

The step of checking said signature target data (r ", s") meets a first predetermined condition, if they meet a first predetermined condition, calculates the target user's public key P A 'is;

The first preset condition includes at least one of the following conditions:

r"∈[1,n-1] is established, s"∈[1,n-1] is established, (r"+s") mod n=t is not zero, and the value of [t -1 ] mod n Not zero, the value of (r"－e)mod n is not zero.
The method according to claim 2 or 3, wherein before saving the calculated public key of the target user in the local blockchain node device, the method further comprises:

Check of the target user's public key P A 'meets a second preset condition, if they meet the step of the local node device block chain of the target user to save the calculated public key is performed;

Said second predetermined condition comprises: the equation ([t -1] P A ' + [s "] G) .x + e = r" mod n holds.
A data processing system in a blockchain network is characterized in that it includes:

The receiving unit is configured to receive the target signature data that has passed the verification and obtain the original message parameters corresponding to the target signature data, where the target signature data is data obtained after the target user's public key is used to encrypt the original message;

The obtaining unit is used to obtain the algorithm parameter corresponding to the public key of the target user, and the algorithm parameter is used to indicate the asymmetric encryption algorithm used in the calculation of the public key of the target user and the corresponding asymmetric encryption algorithm. Required calculation parameters;

The processing unit is configured to calculate the public key of the target user according to the target signature data, algorithm parameters and the original message parameters, and save the calculated public key of the target user on the local blockchain node device.
A block chain node device, characterized in that the block chain node device includes a memory and a processor, the memory stores a computer program that can run on the processor, and the computer program is The processor implements the method according to any one of claims 1-5 when executed.
The blockchain node device according to claim 7, wherein the blockchain node device is a node forming a CDN network or a blockchain network.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and the computer program can be executed by one or more processors to implement any one of claims 1 to 5 The data processing method in the blockchain network described in the item.
A computer program product, which is characterized by comprising computer instructions, which when running on a computer, enables the computer to execute the data processing method in the blockchain network according to any one of claims 1 to 5.