WO2022068355A1

WO2022068355A1 - Encryption method and apparatus based on feature of information, device, and storage medium

Info

Publication number: WO2022068355A1
Application number: PCT/CN2021/109166
Authority: WO
Inventors: 贾牧; 谢丹力; 陆陈一帆
Original assignee: 深圳壹账通智能科技有限公司
Priority date: 2020-09-29
Filing date: 2021-07-29
Publication date: 2022-04-07
Also published as: CN112131593A

Abstract

Disclosed in embodiments of the present application are an encryption method and apparatus based on a feature of information, a device, and a storage medium. The encryption method based on a feature of information comprises: obtaining a target function used for describing information, and feature information of target information to be processed; dividing the target information according to the feature information of the target information to obtain at least two pieces of sub-information; obtaining, according to the target function, coordinate information corresponding to each of the at least two pieces of sub-information; encrypting the coordinate information of each of the at least two pieces of sub-information to obtain ciphertext of the coordinate information corresponding to each piece of sub-information; and determining the ciphertext of the coordinate information corresponding to each piece of sub-information as ciphertext of the target information, and storing the ciphertext of the target information in a blockchain network. By means of the present application, the security of target information can be improved; the present application is suitable for the field of smart health, and can further promote the construction of smart cities.

Description

Encryption method, device, device and storage medium based on characteristics of information

This application claims the priority of the Chinese patent application filed on September 29, 2020 with the application number 202011055317.7 and the title of the invention is "Encryption Method, Device, Equipment and Storage Medium Based on Information Features", the entire contents of which are Incorporated herein by reference.

technical field

The present application relates to the field of blockchain technology, and in particular, to an encryption method, device, device and storage medium based on the characteristics of information.

Background technique

At present, under the background of big data, the confidentiality of information such as the user's disease diagnosis data, name, contact number, e-mail, home address, bank account number, etc. in the user's electronic information file is becoming more and more important. However, the inventor realized that, in the prior art, symmetric encryption algorithm is generally used to encrypt the generated information. For example, when encrypting the medical record information of a large number of patients generated in a medical institution, the encrypted ciphertext is relatively easy to be encrypted. Crack, the security is not high, and then bring unnecessary losses to the user. In addition, the generated ciphertext is stored in the local database of the terminal, which is easily tampered with by illegal users, so that the target message cannot be obtained by decrypting the ciphertext of the target information.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an encryption method, device, device, and storage medium based on features of information, which can improve the security of target information.

In a first aspect, an embodiment of the present application provides an encryption method based on a feature of information, the method comprising:

Obtain the objective function used to describe the information, and the feature information of the target information to be processed; the feature information of the target information includes the semantic information of the target information, the paragraph feature of the target information, and the length of the target information. at least one of;

Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information;

Acquire coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the objective function;

Encrypting the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The ciphertext of the coordinate information corresponding to each piece of sub-information is determined as the ciphertext of the target information, and the ciphertext of the target information is stored in the blockchain network.

In the second aspect, an embodiment of the present application provides an encryption device based on a feature of information, the device comprising:

The first acquisition module is used to acquire an objective function for describing information, and feature information of the target information to be processed; the feature information of the target information includes semantic information of the target information, paragraph features of the target information and at least one of the lengths of the target information;

a dividing module, configured to divide the target information according to the feature information of the target information, and obtain at least two pieces of sub-information;

A second obtaining module, configured to obtain coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function;

an encryption module, configured to encrypt the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The storage module is configured to determine the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network.

In a third aspect, an embodiment of the present application provides an electronic device, the device comprising: a processor adapted to implement one or more instructions; and,

A computer storage medium storing one or more instructions adapted to be loaded by the processor and perform the following steps:

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium stores one or more instructions, and the one or more instructions are suitable for being loaded and executed by a processor Follow the steps below:

The embodiments of the present application can increase the difficulty of decrypting the ciphertext of the target information, prevent the ciphertext of the target message from being cracked, prevent the target information from being leaked, and improve the security of the target message. At the same time, the ciphertext of the target information can be effectively prevented from being stored locally in the terminal, resulting in the ciphertext of the target information being tampered with, resulting in the inability to obtain the target message by decrypting the ciphertext of the target information, thereby improving the security of the target information.

Description of drawings

Fig. 1a is a schematic diagram of the architecture of a feature-based encryption system provided by an embodiment of the present application;

1b is a schematic diagram of a data sharing system provided by an embodiment of the present application;

FIG. 1c is a schematic structural diagram of a blockchain block provided by an embodiment of the present application;

2 is a schematic flowchart of an encryption method based on a feature of information provided by an embodiment of the present application;

3 is a schematic diagram of a method for dividing target information according to feature information of target information provided by an embodiment of the present application;

4 is a schematic flowchart of another encryption method based on information features provided by an embodiment of the present application;

5 is a schematic structural diagram of an encryption device based on a feature of information provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an electronic device provided by another embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

This application may relate to the field of artificial intelligence technology, and may be applied to data encryption scenarios. For example, it can be specifically applied to the medical data encryption scenario in digital medicine; another example can be applied to the transaction data encryption scenario in financial technology, and the medical data and transaction data can be stored in the blockchain.

The blockchain involved in this application is a new application mode of computer technologies such as distributed data storage, point-to-point transmission (P2P transmission), consensus mechanism, and encryption algorithm. Using cryptographic methods to associate the generated data blocks, each data block contains a batch of network transaction information, which is used to verify the validity of its information (anti-counterfeiting) and generate the next block. The blockchain can include the underlying platform of the blockchain, the platform product service layer and the application service layer; the blockchain can be composed of multiple serial transaction records (also known as blocks) that are connected and protected by cryptography. The distributed ledger connected by the blockchain allows multiple parties to effectively record the transaction, and the transaction can be permanently checked (it cannot be tampered with). Among them, the consensus mechanism refers to the mathematical algorithm that realizes the establishment of trust between different nodes and the acquisition of rights and interests in the blockchain network; that is to say, the consensus mechanism is a mathematical algorithm recognized by all network nodes of the blockchain.

First, the architecture of the information feature-based encryption system applied in this application is introduced, as shown in Fig. 1a. The schematic diagram of the system architecture includes a blockchain network and multiple terminals. In FIG. 1a, three terminals are taken as an example, namely a first terminal, a second terminal and a third terminal. The first terminal, the second terminal and the third terminal can be used to obtain the ciphertext of the target information from the blockchain network, or store the ciphertext of the target information in the blockchain network.

The above-mentioned blockchain network may be the blockchain network 100 shown in FIG. 1b, and the blockchain network 100 refers to a system for data sharing between node devices and node devices. It includes multiple node devices 101, and the multiple node devices 101 may refer to each client in the blockchain network. Each node device 101 can receive data during normal operation, and maintain the shared data within the blockchain network based on the received transaction data. In order to ensure the information exchange in the blockchain network, there can be an information connection between each node device in the blockchain network, and the node devices can transmit information through the above information connection. Each node device in the blockchain network stores an identical blockchain. The blockchain consists of multiple blocks, see Figure 1c, the blockchain consists of multiple blocks, the founding block includes the block header and the block body, and the block header stores the data feature value, version number, timestamp and Difficulty value, data is stored in the block body; the next block of the genesis block takes the genesis block as the parent block, the next block also includes the block header and the block body, and the block header stores the data of the current block The feature value, the feature value of the block header of the parent block, the version number, the timestamp and the difficulty value, and so on, so that the block data stored in each block in the blockchain is the same as the area stored in the parent block. The block data is associated, which ensures the security of the data in the block.

Among them, the node equipment, the first terminal, the second terminal and the third terminal in the blockchain network can be computer equipment, including mobile phones, tablet computers, notebook computers, PDAs, smart speakers, mobile Internet equipment (MID, mobile internet device), POS (Point Of Sales) machines, wearable devices (such as smart watches, smart bracelets, etc.), etc.; it can also be an independent server, or a server cluster composed of several servers, or a cloud A computing center; it can also provide cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, Content Delivery Network (CDN), and Cloud servers for basic cloud computing services such as big data and artificial intelligence platforms.

Please refer to FIG. 2 , which is a schematic flowchart of an encryption method based on an information feature provided by an embodiment of the present application. The embodiment of the present application is executed by an electronic device, and the encryption method based on an information feature includes steps S101 to S105 .

S101: Acquire an objective function for describing information and feature information of the target information to be processed.

In this embodiment, the target information may refer to transaction data, business data, and the like of a certain institution. The feature information of the target information includes at least one of semantic information of the target information, paragraph features of the target information, and length of the target information. Among them, the objective function is used to describe the target information, that is, the target information is converted into the coordinate information corresponding to the objective function, so as to improve the security of the target information.

Optionally, the objective function may be an elliptic curve algorithm, and the elliptic curve algorithm is an asymmetric encryption algorithm implemented based on the mathematical theory of elliptic curves. The function expression form of the elliptic curve algorithm is y^2=x^3+ax+b, and the coordinates (x, y) of any point on the elliptic curve satisfy y^2=x^3+ax+b, that is, according to Knowing x calculates the corresponding y. Therefore, the target information can be converted into coordinate information on the target function, so as to store the target information in the blockchain network, thereby increasing the protection of the target information.

S102: Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information.

In order to increase the difficulty of decrypting the ciphertext of the target information and prevent the ciphertext of the target information from being cracked by illegal users, at the same time, if the data corresponding to the target information is too large, it indicates that the target information deviates from the target function. The coordinate information corresponding to the target information is obtained. Therefore, the target information can be divided according to the feature information of the target information to obtain at least two sub-information. Specifically, the target information can be divided into equal lengths according to the characteristic information of the target information to obtain at least two sub-information, that is, each sub-information in the at least two sub-information has the same length; or, the target information can be divided according to the characteristic information of the target information. The unequal length division obtains at least two pieces of sub-information, that is, according to the feature information of the target information, each piece of sub-information has different lengths, or at least some of the two pieces of sub-information have different lengths. Dividing the target information by the feature information of the target information can improve the success rate of obtaining the coordinate information corresponding to the target information according to the target function, and is beneficial to improve the security of the target information.

As shown in FIG. 3 , a schematic diagram of a method for dividing target information according to feature information of target information provided by an embodiment of the present application. As shown in FIG. 3 , the method for dividing target information according to feature information of target information is shown in FIG. 3 . The steps include S21-S23.

S21, analyze the semantic information of the target information to obtain at least two keywords.

The target information can be analyzed by a keyword extraction algorithm to extract at least two keywords in the target information. For example, the target information can be analyzed according to a TextRank algorithm to obtain at least two keywords. The TextRank algorithm is an algorithm based on graph sorting. It divides the text into several units (words, sentences) and establishes a graph model, uses the voting mechanism to sort the important components in the text, and uses the information of the single chapter document itself. Implement keyword extraction and abstracting.

S22: Acquire the positions of at least two keywords in the target information.

S23: Divide the target information according to the positions of the at least two keywords in the target information to obtain at least two pieces of sub-information, one keyword corresponding to one piece of sub-information.

After obtaining at least two keywords according to the keyword extraction algorithm, obtain the positions of the at least two keywords in the text content of the target information, such as in the front part, the middle part, or the back part of the text content of the target information. The target information may be divided according to the positions of the at least two keywords in the text content of the target information to obtain at least two pieces of sub-information, one keyword corresponding to one piece of sub-information. For example, the target information includes the number of orders: 500, the unit price of the goods: 1000 yuan/piece, and the total profit: 5 million yuan. The semantic information of the target information can be analyzed to obtain at least two keywords, that is, the keywords include order, unit price , Profit, you can use the statement where the order is located as a sub-information, the statement where the unit price is located as a sub-information, and the statement where the profit is located as a sub-information. That is, according to the keywords in the target information, three pieces of sub-information can be obtained. The first sub-information is: order quantity: 500, the second sub-information is: unit price of goods: 1000 yuan/piece, and the second sub-information is: total Profit: 500 million.

Optionally, the feature information of the target information includes paragraph features of the target information; segment the target information according to the paragraph features of the target information to obtain multiple information paragraphs; obtain the similarity between adjacent paragraphs in the multiple information paragraphs; The information paragraphs whose similarity is greater than the similarity threshold among the plurality of information paragraphs are combined to obtain at least two pieces of sub-information.

The feature information of the target information includes the paragraph feature of the target information, and the paragraph feature of the target information includes the number of paragraphs. The target information can be divided according to the number of paragraphs of the target information to obtain multiple information paragraphs, that is, the information in each paragraph is used as a Information paragraph. Then, a distance algorithm may be used to calculate the distance between adjacent paragraphs in the plurality of information paragraphs, and the distance algorithm may include: EMD distance algorithm, Euclidean distance algorithm, Manhattan distance algorithm, and so on. Determine the similarity between adjacent paragraphs in multiple information paragraphs according to the distance between adjacent paragraphs in multiple information paragraphs; if the distance between adjacent paragraphs is smaller, the similarity between adjacent paragraphs is higher ; The greater the distance between adjacent paragraphs, the lower the similarity between adjacent paragraphs. Optionally, the similarity between adjacent paragraphs in the multiple information paragraphs may be calculated according to a similarity algorithm, and the similarity algorithm may include: a cosine similarity algorithm, a Pearson correlation coefficient algorithm, a Jaccard similarity coefficient algorithm, and the like. The information paragraphs whose similarity is greater than the similarity threshold among the plurality of information paragraphs are combined to obtain at least two pieces of sub-information.

Optionally, the characteristic information of the target information includes the length of the target information; the common divisor of the length of the target information is obtained; the common divisor of the length of the target information is determined as the division step size, and the division step size is smaller than the length of the target information; The target information is divided for a long time to obtain at least two sub-information.

When the target information is divided according to the length of the target information, the common divisor of the length of the target information can be obtained, and the common divisor of the length of the target information can be determined as the division step size. The division step size of the target information is smaller than the length of the target information to ensure that At least two pieces of sub-information can be obtained. The target information is divided according to the division step to obtain at least two pieces of sub-information. For example, the length of the target information is 24 bytes, and the common divisor of the length of the acquired target information is 4, that is, the division step size is 4 bytes. The target information is divided according to the division step, and 6 pieces of sub-information are obtained, and the length of each sub-information is 4 bytes. By dividing the target information according to the length of the target information, the target information can be divided into equal lengths, the success rate of obtaining the coordinate information corresponding to the target information according to the target function can be improved, and the security of the target information can be improved.

Optionally, multiple random numbers may be generated according to the length of the target information. The multiple random numbers may not be equal, or some random numbers may be equal, and the sum of the multiple random numbers is equal to the length of the target information. The multiple random numbers are used as a division step, and the target information is divided according to the division step to obtain at least two pieces of sub-information. For example, the length of the target information is 24 bytes, and 5 random numbers are generated according to the length of the target information, namely 3, 4, 5, 6, and 6, and the sum of the 5 random numbers is equal to the length of the target information. The 5 random numbers are used as 5 division steps, the target information is divided according to the 5 division steps, and 5 pieces of sub-information are obtained. The lengths of the 5 pieces of sub-information are 3 bytes, 4 bytes, and 5 bytes respectively. , 6 bytes, 6 bytes.

S103: Acquire coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function.

In this embodiment, the coordinate information corresponding to each of the at least two sub-information is obtained according to the objective function, that is, each of the at least two sub-information is converted into the corresponding coordinate information in the objective function.

For example, if the data type of the target information is a numeric type, that is, the data type of the sub-information is also a numeric type, the coordinate information corresponding to each of the at least two sub-information can be obtained directly according to the objective function; when the data type of the target information is not Numerical type, that is, the data type of the sub-information is a non-numeric type, the sub-information can be encoded according to the numerical conversion coding to obtain the sub-information of the numerical type, and the coordinate information corresponding to the sub-information of the numerical type can be obtained according to the objective function, as each sub-information The coordinate information corresponding to the information. Specifically, the numeric conversion encoding includes: one-hot encoding (a non-numeric type is converted into a numeric type encoding), Label encoding (a non-numeric type is converted into a numeric type encoding), factorizing encoding (a non-numeric type conversion is performed) for numeric encoding) and so on.

Optionally, obtain the curve corresponding to the objective function; map each piece of sub-information to the first coordinate of the target point on the curve corresponding to the objective function; determine the position of the target point on the curve corresponding to the objective function according to the first coordinate and the objective function. The second coordinate; the first coordinate and the second coordinate are determined as the coordinate information corresponding to each piece of sub-information.

The objective function may be a function algorithm corresponding to an elliptic curve, or a function corresponding to other curves. The curve corresponding to the objective function can be obtained, and the curve corresponding to the objective function can be prime256v1 curve, secp256r1 curve, nistp256 curve, secp256k1 curve and so on. The target sub-information is mapped to the first coordinate of the target point corresponding to each sub-information on the curve corresponding to the target function, that is, when the data type of the target sub-information is a numerical type, the target sub-information can be used as the target on the corresponding curve of the target function. The first coordinate of the point; or, when the data type of the target sub-information is a non-numeric type, encode the target sub-information to obtain the target sub-information of the numerical type, and use the target sub-information of the numerical type as the curve corresponding to the target function The first coordinate of the target point on the target sub-information; the target sub-information can be any sub-information in the above-mentioned at least two sub-information. Further, the second coordinate of the target point on the curve corresponding to the objective function may be determined according to the objective function and the first coordinate, and the first coordinate and the second coordinate may be determined as the coordinate information corresponding to each piece of sub-information.

For example, the curve of the objective function can be the secp256r1 curve in the elliptic curve, the expression form of the elliptic curve function can be y^2=x^3+ax+b, and the coordinates (x, y) of any point on the elliptic curve satisfy y ^2=x^3+ax+b, that is, the corresponding y can be calculated according to the known x. Therefore, if the data type of the target sub-information is a numerical type, the target sub-information can be used as the X coordinate of the target point on the secp256r1 curve corresponding to the objective function; further, according to the function expression of the secp256r1 curve and the X coordinate, the objective function is obtained by calculation The Y coordinate of the target point on the corresponding secp256r1 curve; the X coordinate and Y coordinate of the target point are determined as the coordinate information corresponding to the target sub-information. If the data type of the target information is a non-numeric type and is a string type, the target information is encoded according to the one-hot encoding to obtain the sub-information of the numeric type; The X coordinate of the target point; further, according to the function expression of the secp256r1 curve and the X coordinate, calculate the Y coordinate of the target point on the secp256r1 curve corresponding to the objective function; determine the X coordinate and Y coordinate of the target point as the target sub-information corresponding coordinate information.

S104: Encrypt the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information.

The electronic device can use an encryption algorithm to encrypt each sub-information in the at least two sub-information to obtain the ciphertext of the coordinate information corresponding to each sub-information. The encryption algorithm may include but is not limited to RSA algorithm, Elgamal algorithm, knapsack algorithm, Rabin algorithm, D-H algorithm, ECC (elliptic curve encryption algorithm). RSA algorithm, Elgamal algorithm, knapsack algorithm, Rabin algorithm, D-H algorithm are all asymmetric algorithms.

S105: Determine the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network.

After obtaining the ciphertext of the coordinate information corresponding to each sub-information, determine the ciphertext of the coordinate information corresponding to each sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network. The information stored on the chain network cannot be changed. In this way, the ciphertext of the target information is stored in the blockchain network, which can prevent the ciphertext of the target information from being tampered with by illegal users and improve the security of the target information.

This application can also be used in a medical platform, that is, the above target information can refer to the patient's medical record information, the patient's corresponding patient information, etc., such as medical images (link + access code), image annotations, prescriptions, diagnosis, treatment records , expense receipts, etc. After dividing the patient's medical record information and the patient's corresponding patient information, the patient's medical record information and the patient's corresponding patient information can be obtained according to the objective function. Coordinate information, and then encrypt the patient's medical record information and the coordinate information corresponding to the patient's corresponding patient information, and store the encrypted information in the blockchain network, which is conducive to the management of patient information and medical records, and improves the Security of patient information.

In the embodiment of the present application, by acquiring an objective function for describing information and feature information of the target information to be processed; dividing the target information according to the feature information of the target information, and obtaining at least two pieces of sub-information; and obtaining at least two pieces of information according to the objective function The coordinate information corresponding to each sub-information in the two sub-information is encrypted, and the coordinate information of each sub-information in the at least two sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each sub-information; the ciphertext of the coordinate information corresponding to each sub-information is obtained. Determine the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network. This increases the difficulty of decrypting the ciphertext of the target information, prevents the ciphertext of the target message from being cracked, prevents the target information from being leaked, and improves the security of the target message. At the same time, the ciphertext of the target information can be effectively prevented from being stored locally in the terminal, resulting in the ciphertext of the target information being tampered with, resulting in the inability to obtain the target message by decrypting the ciphertext of the target information, thereby improving the security of the target information.

As shown in FIG. 4 , a schematic flowchart of another encryption method based on information features provided in this embodiment, as shown in FIG. 4 , the schematic flowchart of another encryption method based on information features includes steps S201- S206.

S201 , acquiring an objective function for describing information and feature information of the target information to be processed.

S202: Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information.

S203: Acquire coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function.

For the specific content of steps S201-S203, reference may be made to the content described in the embodiment of FIG. 2, which will not be repeated here.

S204: Obtain a key corresponding to each piece of sub-information in the at least two pieces of sub-information.

The key corresponding to each sub-information can be obtained, and each sub-information can be encrypted according to the corresponding key of each sub-information, which can help to improve the security of the target information and prevent the target information from being leaked; Each piece of sub-information has a corresponding key, which is beneficial to the terminal to which the sub-information belongs can quickly decrypt the ciphertext of the coordinate information corresponding to the sub-information, thereby improving the efficiency of decrypting the information.

Optionally, at least two pieces of sub-information in the target information include first sub-information and second sub-information, attribute information of the target information can be acquired, and the target root key can be generated according to the attribute information of the target information. A hash operation is performed on the target root key to obtain a key of the first sub-information, and a hash operation is performed on the key of the first sub-information to obtain a key of the second sub-information.

The electronic device can obtain attribute information of the target information. The attribute information of the target information includes but is not limited to the terminal identifier of the terminal to which the target information belongs, the number of sub-information in the target information, the generation time of the target information, the length of the target information, and so on. The terminal identifier may refer to at least one of an IP address, a MAC address, a serial number, and the like of the terminal. The target root key can be generated according to the attribute information of the target information. For example, a random number corresponding to the target information can be generated according to the generation time of the target information, and the random number corresponding to the target information can be filled to obtain the target root key corresponding to the target information. The length of the target information can also be used as the target root key. Perform a hash operation on the target root key to obtain a key corresponding to the first sub-information. The key corresponding to the first sub-information is then hashed to obtain the key corresponding to the second sub-information. For example, the target root key M is generated according to the generation time of the target information, and a hash operation is performed on the target root key to obtain the first hash key M1, that is, H(M)=M1, then the first hash key M1 is obtained. as the key corresponding to the first sub-information. Then perform a hash operation on the key M1 corresponding to the first sub-information to obtain a second hash key M2, that is, H(M1)=M2, then use the second hash key M2 as the key corresponding to the second sub-information. key. In this way, each piece of sub-information has a corresponding key, and then each piece of sub-information is encrypted according to the key corresponding to each piece of sub-information. Decrypting the ciphertext improves the efficiency of decrypting the information, and also helps to improve the security of the target information, which can prevent the target information from being leaked.

Optionally, user information corresponding to the target information may be obtained, and a key corresponding to each piece of sub-information may be generated according to the user information corresponding to the target information. Specifically, the user information may be a user account, a user password, a user phone number, and the like. User information corresponding to the target information can be obtained, a random number corresponding to each sub-information is generated according to the user information corresponding to the target information, and a key corresponding to each sub-information is generated according to the random number corresponding to each sub-information. For example, obtain the user account corresponding to the target information, call the rand function in the C language, and generate at least two random numbers according to the user account corresponding to the target information, one sub-information corresponds to a random number, and then the random number corresponding to each sub-information is generated. Perform a hash operation to obtain the key corresponding to each sub-information.

S205 , encrypting the coordinate information of the corresponding sub-information in the at least two pieces of sub-information by using the key corresponding to each sub-information, to obtain the ciphertext of the coordinate information corresponding to each sub-information.

S206: Determine the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network.

After obtaining the key corresponding to each sub-information, encrypt the corresponding sub-information in each sub-information by using the key corresponding to each sub-information, and obtain the ciphertext of the coordinate information corresponding to each sub-information.

Optionally, the electronic device may generate a private key corresponding to the terminal according to the terminal identifier of the terminal to which the target information belongs. Then, according to the private key and the key corresponding to each piece of sub-information, the coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information. The specific implementation of obtaining the ciphertext of the coordinate information corresponding to each piece of sub-information includes: obtaining the base point coordinates of the curve of the objective function; obtaining the product of the base point coordinates and the private key of the terminal to obtain candidate coordinates; The key corresponding to the information encrypts the candidate coordinate to obtain the ciphertext of the candidate coordinate; the coordinate information corresponding to each sub-information is fused with the ciphertext of the corresponding candidate coordinate, and the ciphertext of the coordinate information corresponding to each sub-information is obtained. ciphertext.

After the curve corresponding to the objective function is acquired, the base point coordinates of the curve corresponding to the objective function are acquired, and the base point coordinates of the curve corresponding to the objective function are multiplied by the above private key to obtain candidate coordinates. After encrypting the candidate coordinates with the key corresponding to each piece of sub-information, the ciphertext of the candidate coordinates is obtained. The coordinate information corresponding to each piece of sub-information is fused with the ciphertext of the corresponding candidate coordinates to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information.

For example, the private key Q is obtained according to the block information of the target block. Obtain the curve corresponding to the objective function as the secp256r1 curve, obtain the base point coordinate G(Xg, Yg) of the secp256r1 curve, and multiply the above-mentioned private key Q with the base point coordinate to obtain the candidate coordinate H, the candidate coordinate H=G*Q. Encrypt the candidate coordinate H according to the key Ki corresponding to each piece of sub-information to obtain the ciphertext P1 of the candidate coordinate. P1 can be equal to the product of the key Ki corresponding to each piece of sub-information and the candidate coordinate, that is, P1=Ki*H. After obtaining the coordinate information corresponding to a certain sub-information as P2 (X1, Y1), the coordinate information P2 (X1, Y1) corresponding to the sub-information is fused with the ciphertext P1 of the corresponding candidate coordinates to obtain the corresponding sub-information. Ciphertext C1 of the coordinate information. For example, the coordinate information P2 (X1, Y1) corresponding to the piece of sub-information can be added to the ciphertext P1 of the corresponding candidate coordinates to obtain the ciphertext C1 of the coordinate information corresponding to the piece of sub-information, that is, C1=P2+P1. In this way, the coordinates corresponding to each piece of sub-information in the target information are encrypted, and the ciphertext of the coordinate information corresponding to each piece of sub-information is obtained.

After obtaining the ciphertext corresponding to each sub-information in the at least two sub-information in the target information, determine the ciphertext of the coordinate information corresponding to each sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network In the road, the information stored on the blockchain network cannot be changed, so that the ciphertext of the target information is stored in the blockchain network, which can prevent the ciphertext of the target information from being tampered with by illegal users and improve the security of the target information.

In the embodiment of the present application, by acquiring an objective function for describing information and feature information of the target information to be processed; dividing the target information according to the feature information of the target information, and obtaining at least two pieces of sub-information; and obtaining at least two pieces of information according to the objective function Coordinate information corresponding to each sub-information in the two sub-information, and obtain the key corresponding to each sub-information; use the key corresponding to each sub-information to encrypt the coordinate information of each sub-information in at least two sub-information, and obtain each sub-information corresponding to The ciphertext of the coordinate information, which can help improve the security of the target information and prevent the target information from being leaked; at the same time, since each of the above sub-information has a corresponding key, it is beneficial for the terminal to which the sub-information belongs to be able to quickly Decrypt the ciphertext of the coordinate information corresponding to the sub-information to improve the efficiency of decrypting the information; determine the ciphertext of the coordinate information corresponding to each sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the block in the chain network. This increases the difficulty of decrypting the ciphertext of the target information, prevents the ciphertext of the target message from being cracked, prevents the target information from being leaked, and improves the security of the target message. At the same time, the ciphertext of the target information can be effectively prevented from being stored locally in the terminal, resulting in the ciphertext of the target information being tampered with, resulting in the inability to obtain the target message by decrypting the ciphertext of the target information, thereby improving the security of the target information.

Please refer to FIG. 5 , which is a schematic structural diagram of an encryption device based on information features provided by an embodiment of the present application. The device in the embodiment of the present application may be in the above-mentioned electronic device. In this embodiment, the information-based feature encryption device includes:

The first acquisition module 11 is used to acquire the objective function for describing information, and the feature information of the target information to be processed; the feature information of the target information includes the semantic information of the target information and the paragraph feature of the target information and at least one of the length of the target information;

A division module 12, configured to divide the target information according to the characteristic information of the target information, and obtain at least two pieces of sub-information;

Wherein, the feature information of the target information includes semantic information of the target information;

The above-mentioned division module 12 includes: an analysis unit, a first acquisition unit, and a first division unit.

an analysis unit, configured to analyze the semantic information of the target information to obtain at least two keywords;

a first obtaining unit, configured to obtain the positions of the at least two keywords in the target information;

The first dividing unit is configured to divide the target information according to the positions of the at least two keywords in the target information, and obtain at least two pieces of sub-information, and one keyword corresponds to one piece of sub-information.

Wherein, the feature information of the target information includes paragraph features of the target information;

The foregoing division module 12 further includes: a second division unit, a second acquisition unit, and a merging unit.

a second dividing unit, configured to divide the target information into paragraphs according to the paragraph characteristics of the target information to obtain a plurality of information paragraphs;

a second obtaining unit, configured to obtain the similarity between adjacent paragraphs in the plurality of information paragraphs;

The merging unit is used for merging the information paragraphs whose similarity is greater than the similarity threshold in the plurality of information paragraphs to obtain at least two pieces of sub-information.

Wherein, the feature information of the target information includes the length of the target information;

The above division module 12 further includes: a third acquisition unit, a first determination unit, and a third division unit.

a third obtaining unit, used for obtaining the common divisor of the length of the target information;

a first determining unit, configured to determine the common divisor of the length of the target information as a division step size, where the division step size is smaller than the length of the target information;

A third division unit, configured to divide the target information according to the division step to obtain at least two pieces of sub-information.

The second obtaining module 13 is configured to obtain the coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the objective function;

The above-mentioned second obtaining module 13 includes: a fifth obtaining unit, a mapping unit, a second determining unit, and a third determining unit.

a fifth acquisition unit, used for acquiring the curve corresponding to the objective function;

a mapping unit for mapping each piece of sub-information to the first coordinate of the target point on the curve corresponding to the target function;

a second determining unit, configured to determine the second coordinate of the target point on the curve corresponding to the objective function according to the first coordinate and the objective function;

A third determining unit, configured to determine the first coordinate and the second coordinate as coordinate information corresponding to each piece of sub-information.

An encryption module 14, configured to encrypt the coordinate information of the corresponding sub-information in the at least two pieces of sub-information, to obtain the ciphertext of the coordinate information corresponding to each of the sub-information;

Wherein, the above-mentioned encryption module 14 includes:

a fourth obtaining unit, configured to obtain a key corresponding to each piece of sub-information in the at least two pieces of sub-information;

The encryption unit is configured to encrypt the coordinate information of the corresponding sub-information in the at least two pieces of sub-information by using the key corresponding to each piece of sub-information, and obtain the ciphertext of the coordinate information corresponding to each of the sub-information.

Wherein, the at least two pieces of sub-information include first sub-information and second sub-information;

The above-mentioned fourth acquisition unit is specifically used for:

acquiring attribute information of the target information;

generating a target root key according to the attribute information of the target information;

Hash operation is performed on the target root key to obtain the key of the first sub-information;

Perform a hash operation on the key of the first sub-information to obtain the key of the second sub-information.

The storage module 15 is configured to determine the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network.

Please refer to FIG. 6 , which is a schematic structural diagram of an electronic device provided by an embodiment of the present application. The electronic device in the present application may also be called a computer device. Wherein, the electronic device may include a processor. Optionally, the electronic device may further include at least one of a memory, an input device, and an output device. For example, the electronic device in this embodiment as shown in FIG. 6 may include: one or more processors 21 ; one or more input devices 22 , one or more output devices 23 and a memory 24 . The above-mentioned processor 21 , input device 22 , output device 23 , and memory 24 are connected through a bus 25 .

The processor 21 can be a central processing unit (Central Processing Unit, CPU), and the processor can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC) ), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The input device 22 may include a touch panel, a fingerprint sensor (used to collect the user's fingerprint information and fingerprint direction information), a microphone, etc., and the output device 23 may include a display (LCD, etc.), a speaker, etc., and the output device 23 may output corrections The processed data table.

The memory 24 may include read only memory and random access memory and provides instructions and data to the processor 21 . A portion of the memory 24 may also include non-volatile random access memory, the memory 24 for storing a computer program including program instructions, and the processor 21 for executing the program instructions stored in the memory 24 for executing a An encryption method based on the characteristics of information, i.e. used to do the following:

Optionally, the processor 21 is configured to execute the program instructions stored in the memory 24 to perform the following operations:

Analyzing the semantic information of the target information to obtain at least two keywords;

obtaining the positions of the at least two keywords in the target information;

According to the positions of the at least two keywords in the target information, the target information is divided to obtain at least two pieces of sub-information, and one keyword corresponds to one piece of sub-information.

According to the paragraph feature of the target information, the target information is divided into paragraphs to obtain a plurality of information paragraphs;

obtaining the similarity between adjacent paragraphs in the plurality of information paragraphs;

Merging information paragraphs with a similarity greater than a similarity threshold in the plurality of information paragraphs to obtain at least two pieces of sub-information.

Obtain the common divisor of the length of the target information;

The common divisor of the length of the target information is determined as a division step, and the division step is smaller than the length of the target information;

The target information is divided according to the division step size to obtain at least two pieces of sub-information.

Obtain the key corresponding to each piece of sub-information in the at least two pieces of sub-information;

Using the key corresponding to each piece of sub-information, the coordinate information of the corresponding sub-information in the at least two pieces of sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each of the sub-information.

acquiring attribute information of the target information;

obtaining the curve corresponding to the objective function;

mapping each piece of sub-information to the first coordinate of the target point on the curve corresponding to the target function;

According to the first coordinate and the objective function, determine the second coordinate of the target point on the curve corresponding to the objective function;

The first coordinate and the second coordinate are determined as coordinate information corresponding to each piece of sub-information.

The processor 21 , the input device 22 , and the output device 23 described in the embodiments of the present application can execute the implementations described in the embodiments of the encryption method based on information features provided in the embodiments of the present application, and can also execute the implementations of the present application. The implementation manner of the electronic device described in the example will not be repeated here.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program includes program instructions, and when the program instructions are executed by a processor, FIG. 2 and FIG. 2 are implemented. 4. The encryption method based on the characteristics of the information shown in the embodiment.

Optionally, the storage medium involved in this application, such as a computer-readable storage medium, may be non-volatile or volatile.

The computer-readable storage medium may be an internal storage unit of the electronic device described in any of the foregoing embodiments, such as a hard disk or a memory of a control device. The computer-readable storage medium can also be an external storage device of the control device, such as a plug-in hard disk equipped on the control device, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) ) card, Flash Card, etc. Further, the computer-readable storage medium may also include both an internal storage unit of the control device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the control device. The computer-readable storage medium can also be used to temporarily store data that has been or will be output.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the differences between hardware and software Interchangeability, the above description has generally described the components and steps of each example in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application. Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the control device and unit described above, reference may be made to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed control device and method may be implemented in other manners. For example, the device embodiments described above are illustrative, for example, the division of the units may be a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in the present application. Modifications or substitutions shall be covered by the protection scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An encryption method based on the characteristics of information, comprising:

Obtain the objective function used to describe the information, and the feature information of the target information to be processed; the feature information of the target information includes the semantic information of the target information, the paragraph feature of the target information, and the length of the target information. at least one of;

Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information;

Acquire coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the objective function;

Encrypting the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The ciphertext of the coordinate information corresponding to each piece of sub-information is determined as the ciphertext of the target information, and the ciphertext of the target information is stored in the blockchain network.
The method according to claim 1, wherein the feature information of the target information includes semantic information of the target information;

The target information is divided according to the feature information of the target information, and at least two sub-messages are obtained, including:

Analyzing the semantic information of the target information to obtain at least two keywords;

obtaining the positions of the at least two keywords in the target information;

According to the positions of the at least two keywords in the target information, the target information is divided to obtain at least two pieces of sub-information, and one keyword corresponds to one piece of sub-information.
The method according to claim 1, wherein the feature information of the target information comprises a paragraph feature of the target information;

The target information is divided according to the feature information of the target information, and at least two pieces of sub-information are obtained, including:

According to the paragraph feature of the target information, the target information is divided into paragraphs to obtain a plurality of information paragraphs;

obtaining the similarity between adjacent paragraphs in the plurality of information paragraphs;

Merging information paragraphs with a similarity greater than a similarity threshold in the plurality of information paragraphs to obtain at least two pieces of sub-information.
The method according to claim 1, wherein the characteristic information of the target information includes the length of the target information;

The target information is divided according to the feature information of the target information, and at least two pieces of sub-information are obtained, including:

Obtain the common divisor of the length of the target information;

The common divisor of the length of the target information is determined as a division step, and the division step is smaller than the length of the target information;

The target information is divided according to the division step size to obtain at least two pieces of sub-information.
The method according to claim 1, wherein the encrypting the coordinate information of the corresponding sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each of the sub-information, comprising:

Obtain the key corresponding to each piece of sub-information in the at least two pieces of sub-information;

Using the key corresponding to each piece of sub-information, the coordinate information of the corresponding sub-information in the at least two pieces of sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each of the sub-information.
The method of claim 5, wherein the at least two pieces of sub-information include first sub-information and second sub-information;

The obtaining the key corresponding to each piece of sub-information in the at least two pieces of sub-information includes:

acquiring attribute information of the target information;

generating a target root key according to the attribute information of the target information;

Hash operation is performed on the target root key to obtain the key of the first sub-information;

Perform a hash operation on the key of the first sub-information to obtain the key of the second sub-information.
The method according to claim 1, wherein the obtaining the coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function comprises:

obtaining the curve corresponding to the objective function;

mapping each piece of sub-information to the first coordinate of the target point on the curve corresponding to the target function;

According to the first coordinate and the objective function, determine the second coordinate of the target point on the curve corresponding to the objective function;

The first coordinate and the second coordinate are determined as coordinate information corresponding to each piece of sub-information.
A feature-based encryption device comprising:

The first acquisition module is used to acquire an objective function for describing information, and feature information of the target information to be processed; the feature information of the target information includes semantic information of the target information, paragraph features of the target information and at least one of the lengths of the target information;

a dividing module, configured to divide the target information according to the feature information of the target information, and obtain at least two pieces of sub-information;

A second obtaining module, configured to obtain coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function;

an encryption module, configured to encrypt the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The storage module is configured to determine the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and store the ciphertext of the target information in the blockchain network.
A computer device, comprising: a processor, a memory and a network interface;

The processor is connected to a memory and a network interface, wherein the network interface is used to provide a data communication function, the memory is used to store program codes, and the processor is used to call the program codes to execute the following methods:

Obtain the objective function used to describe the information, and the feature information of the target information to be processed; the feature information of the target information includes the semantic information of the target information, the paragraph feature of the target information, and the length of the target information. at least one of;

Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information;

Acquire coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the objective function;

Encrypting the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The ciphertext of the coordinate information corresponding to each piece of sub-information is determined as the ciphertext of the target information, and the ciphertext of the target information is stored in the blockchain network.
The computer device according to claim 9, wherein the feature information of the target information includes semantic information of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two sub-messages, including:

Analyzing the semantic information of the target information to obtain at least two keywords;

obtaining the positions of the at least two keywords in the target information;

According to the positions of the at least two keywords in the target information, the target information is divided to obtain at least two pieces of sub-information, and one keyword corresponds to one piece of sub-information.
The computer device according to claim 9, wherein the feature information of the target information comprises a paragraph feature of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two pieces of sub-information, including:

According to the paragraph feature of the target information, the target information is divided into paragraphs to obtain a plurality of information paragraphs;

obtaining the similarity between adjacent paragraphs in the plurality of information paragraphs;

Merging information paragraphs with a similarity greater than a similarity threshold in the plurality of information paragraphs to obtain at least two pieces of sub-information.
The computer device according to claim 9, wherein the characteristic information of the target information includes a length of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two pieces of sub-information, including:

Obtain the common divisor of the length of the target information;

The common divisor of the length of the target information is determined as a division step, and the division step is smaller than the length of the target information;

The target information is divided according to the division step size to obtain at least two pieces of sub-information.
The computer device according to claim 9, wherein performing the encryption of the coordinate information of the corresponding sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each of the sub-information, comprising:

Obtain the key corresponding to each piece of sub-information in the at least two pieces of sub-information;

Using the key corresponding to each piece of sub-information, the coordinate information of the corresponding sub-information in the at least two pieces of sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each of the sub-information.
The computer device according to claim 9, wherein performing the obtaining of the coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function comprises:

obtaining the curve corresponding to the objective function;

mapping each piece of sub-information to the first coordinate of the target point on the curve corresponding to the target function;

According to the first coordinate and the objective function, determine the second coordinate of the target point on the curve corresponding to the objective function;

The first coordinate and the second coordinate are determined as coordinate information corresponding to each piece of sub-information.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, the computer program includes program instructions, and the program instructions, when executed by a processor, perform the following method:

Obtain the objective function used to describe the information, and the feature information of the target information to be processed; the feature information of the target information includes the semantic information of the target information, the paragraph feature of the target information, and the length of the target information. at least one of;

Divide the target information according to the feature information of the target information to obtain at least two pieces of sub-information;

Acquire coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the objective function;

Encrypting the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain the ciphertext of the coordinate information corresponding to each piece of sub-information;

The ciphertext of the coordinate information corresponding to each piece of sub-information is determined as the ciphertext of the target information, and the ciphertext of the target information is stored in the blockchain network.
The computer-readable storage medium of claim 15, wherein the feature information of the target information comprises semantic information of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two sub-messages, including:

Analyzing the semantic information of the target information to obtain at least two keywords;

obtaining the positions of the at least two keywords in the target information;

According to the positions of the at least two keywords in the target information, the target information is divided to obtain at least two pieces of sub-information, and one keyword corresponds to a piece of sub-information.
The computer-readable storage medium of claim 15, wherein the feature information of the target information comprises a paragraph feature of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two pieces of sub-information, including:

According to the paragraph feature of the target information, the target information is divided into paragraphs to obtain a plurality of information paragraphs;

obtaining the similarity between adjacent paragraphs in the plurality of information paragraphs;

Merging information paragraphs with a similarity greater than a similarity threshold in the plurality of information paragraphs to obtain at least two pieces of sub-information.
The computer-readable storage medium of claim 15, wherein the characteristic information of the target information includes a length of the target information;

Performing the dividing of the target information according to the feature information of the target information to obtain at least two pieces of sub-information, including:

Obtain the common divisor of the length of the target information;

determining the common divisor of the length of the target information as a division step, the division step being less than the length of the target information;

The target information is divided according to the division step size to obtain at least two pieces of sub-information.
The computer-readable storage medium according to claim 15, wherein the encrypting the coordinate information of the corresponding sub-information in the at least two pieces of sub-information is performed to obtain the ciphertext of the coordinate information corresponding to each of the sub-information, include:

Obtain the key corresponding to each piece of sub-information in the at least two pieces of sub-information;

Using the key corresponding to each piece of sub-information, the coordinate information of the corresponding sub-information in the at least two pieces of sub-information is encrypted to obtain the ciphertext of the coordinate information corresponding to each of the sub-information.
The computer-readable storage medium according to claim 15, wherein performing the obtaining of the coordinate information corresponding to each of the at least two pieces of sub-information according to the objective function comprises:

obtaining the curve corresponding to the objective function;

mapping each piece of sub-information to the first coordinate of the target point on the curve corresponding to the target function;

According to the first coordinate and the objective function, determine the second coordinate of the target point on the curve corresponding to the objective function;

The first coordinate and the second coordinate are determined as coordinate information corresponding to each piece of sub-information.