WO2022068359A1

WO2022068359A1 - Encryption method and apparatus for compressing ciphertext of information, and device and medium

Info

Publication number: WO2022068359A1
Application number: PCT/CN2021/109259
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: CN112131591A

Abstract

An encryption method and apparatus for compressing ciphertext of information, and a device and a medium. The method comprises: acquiring a target function for describing information, and target information to be processed (S101); determining, from a curve of the target function, coordinate information corresponding to the target information (S102); encrypting the coordinate information of the target information, so as to obtain ciphertext of the coordinate information corresponding to the target information (S103); compressing the ciphertext of the coordinate information corresponding to the target information, so as to obtain compressed ciphertext corresponding to the target information (S104); and storing, in a blockchain network, the compressed ciphertext corresponding to the target information (S105).

Description

Encryption method, device, device and medium for compressing ciphertext of information

This application claims the priority of the Chinese patent application filed on September 29, 2020, with the application number of 202011053192.4 and the invention titled "Encryption Method, Apparatus, Equipment and Medium for Compressing Ciphertext of Information". The entire contents of this application are incorporated by reference.

technical field

The present application relates to the field of blockchain technology, and in particular, to an encryption method, device, device and medium for compressing ciphertext of information.

Background technique

At present, the Internet is further developing towards mobile, and emerging content such as social networks is also emerging, so that people can easily obtain the information they want. However, as needs and businesses continue to evolve, so does the amount of data generated. Large-scale data has immeasurable value, and the relationship between data will play an important role in the operation and decision-making of companies. The inventor realized that when big data is centrally processing and storing massive data, for example, when storing and managing the medical data of a large number of patients in a medical platform, the ciphertext corresponding to the user data is stored in the local database of the terminal, which is easy to use. It is tampered with by an illegal user, so that the target message cannot be obtained by decrypting the ciphertext of the target information. At the same time, the ciphertext corresponding to the user data is directly stored, which may easily cause the problem of insufficient storage space.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an encryption method, device, device and medium for compressing ciphertext of information, which can improve the security of target information and save storage space.

In a first aspect, an embodiment of the present application provides an encryption method for compressing ciphertext of information, and the method includes:

Obtain the objective function used to describe the information, and the target information to be processed;

Determine the coordinate information corresponding to the target information from the curve of the target function;

Encrypting the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

compressing the ciphertext of the coordinate information corresponding to the target information to obtain the compressed ciphertext corresponding to the target information;

The compressed ciphertext corresponding to the target information is stored in the blockchain network.

In the second aspect, an embodiment of the present application provides an encryption device for compressing ciphertext of information, the device comprising:

The first acquisition module is used to acquire the target function used to describe the information, and the target information to be processed;

A determination module, for determining the coordinate information corresponding to the target information from the curve of the target function;

an encryption module, configured to encrypt the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

a compression module, configured to compress the ciphertext of the coordinate information corresponding to the target information, and obtain the compressed ciphertext corresponding to the target information;

The storage module is used for storing the compressed ciphertext corresponding to 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, where the computer-readable storage medium stores one or more instructions, and the one or more instructions are suitable for being loaded by a processor and performing the following steps :

In the embodiment of the present application, when the compressed ciphertext corresponding to the target information is stored, the storage space of the ciphertext of the target information pair can be reduced; storing the compressed ciphertext corresponding to the target information in the blockchain network can effectively avoid The ciphertext of the target information is stored locally on the terminal, resulting in the ciphertext of the target information being tampered with, resulting in the inability to obtain the target message through decryption according to the ciphertext of the target information, thereby improving the security of the target information.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

1a is a schematic diagram of the architecture of an encryption system for compressing ciphertext of information 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 for compressing ciphertext of information provided by an embodiment of the present application;

3 is a schematic diagram of a method for compressing ciphertext of coordinate information corresponding to target information provided by an embodiment of the present application;

4 is a schematic flowchart of another encryption method for compressing ciphertext of information provided by an embodiment of the present application;

5 is a schematic structural diagram of an encryption device for compressing ciphertext 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 blockchain-based data encryption scenarios. For example, it can be specifically applied to medical data encryption scenarios in digital medicine. For example, medical data can be stored in the blockchain. The medical data can include personal health files, prescriptions, inspection reports and other data, and then the blockchain can be stored in the blockchain. encryption of medical data.

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 encryption system for compressing the ciphertext of information 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. Among them, 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 for compressing ciphertext of information provided by an embodiment of the present application. The embodiment of the present application is performed by an electronic device. The method includes steps S101-S105.

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

In this embodiment, the objective function is used to describe the objective information, that is, the objective information is converted into coordinate information on the curve corresponding to the objective function. The objective function can be an asymmetric elliptic curve algorithm, which is an encryption algorithm 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 A known X calculates the corresponding Y. Therefore, the target information can be converted into the coordinate information on the target function, so as to store the target information in the blockchain network and improve the security of the target information. The target information may refer to transaction data, business data, etc. of an institution.

S102: Determine the coordinate information corresponding to the target information from the curve of the target function.

The curve corresponding to the objective function is obtained, and the target information is used as the first coordinate of the target point on the curve corresponding to the objective function, such as the X coordinate of the target point. According to the first coordinate of the target point and the expression of the curve corresponding to the objective function, the second coordinate, such as the Y coordinate, of the target point on the curve corresponding to the objective function is obtained. The coordinate information of the target information pair is obtained according to the first coordinate and the second coordinate of the target point of the curve corresponding to the objective function. The objective function may be a function algorithm corresponding to an elliptic curve, or a function corresponding to other curves. Obtain the line corresponding to the objective function curve. The curve corresponding to the objective function can be prime256v1 curve, secp256r1 curve, nistp256 curve, secp256k1 curve, etc. Taking the target information as the first coordinate of the target point on the curve corresponding to the target function, that is, when the data type of the target information is a numerical type, the target information can be used as the first coordinate of the target point on the curve corresponding to the target function; or, When the data type of the target information is a non-numeric type, the target information can be encoded according to the numerical conversion coding to obtain the target information of the numerical type, and the target information of the numerical type can be regarded as the first point of the target point on the curve corresponding to the target function. a coordinate. 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.

For example, the curve of the objective function can be the secp256k1 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 information is a numerical type, the target information can be used as the X coordinate of the target point on the secp256k1 curve corresponding to the target function, and the corresponding Y coordinate can be obtained according to the X coordinate; further, according to the function expression of the secp256k1 curve and X coordinate, calculate and obtain the Y coordinate of the target point on the secp256k1 curve corresponding to the objective function; determine the X coordinate and Y coordinate of the target point as the coordinate information corresponding to the target 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 one-hot encoding to obtain the target information of numerical type; the target information of this data type is used as the secp256r1 curve corresponding to the target function. 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 information Corresponding coordinate information, so as to improve the security of target information.

S103: Encrypt the coordinate information of the target information to obtain a ciphertext of the coordinate information corresponding to the target information.

In the embodiment of the present application, the electronic device may use an encryption algorithm to encrypt the target information to obtain the ciphertext of the coordinate information corresponding to the target 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.

Optionally, obtain the user information of the target user corresponding to the target information; generate a key corresponding to the target information according to the user information; encrypt the coordinate information corresponding to the target information by using the key corresponding to the target information to obtain the coordinates corresponding to the target information The ciphertext of the message.

The user information of the target user corresponding to the target information includes, but is not limited to, a user account, a user password, a user phone number, and the like. The key corresponding to the target information is generated according to the user information of the target user, and the coordinate information corresponding to the target information is encrypted by using the key corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information. Specifically, user information corresponding to the target information may be acquired, a random number corresponding to the target information may be generated according to the user information corresponding to the target information, and a key corresponding to the target information may be generated according to the random number corresponding to the target information. For example, obtain the user account corresponding to the target information, call the rand function in the C language, generate a random number corresponding to the target information according to the user account corresponding to the target information, and then perform a hash operation on the random number corresponding to the target information to obtain the corresponding random number of the target information. key. This key is used to encrypt the target information to obtain the ciphertext of the coordinate information corresponding to the target information, which can increase the difficulty of decrypting the ciphertext of the target information, prevent the ciphertext of the target information from being cracked by illegal users, and improve the accuracy of the target information. safety.

Optionally, the electronic device may acquire the terminal identifier of the terminal to which the target information belongs, and 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 the target information, the coordinate information corresponding to the target information is encrypted to obtain the ciphertext of the coordinate information corresponding to the target information. The specific implementation of obtaining the ciphertext of the coordinate information corresponding to the target information includes: obtaining the base point coordinates of the curve of the target function; obtaining the product of the base point coordinates and the private key of the terminal to obtain candidate coordinates; The key encrypts the candidate coordinates to obtain the ciphertext of the candidate coordinates; fuses the coordinate information corresponding to the target information with the ciphertext of the corresponding candidate coordinates to obtain the ciphertext of the coordinate information corresponding to the target information.

For example, the private key Q is obtained according to the block information of the target block for storing the compressed ciphertext corresponding to the target information. 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. The candidate coordinate H is encrypted according to the key K corresponding to the target information, and the ciphertext P1 of the candidate coordinate is obtained. P can be equal to the product of the key K corresponding to the target information and the candidate coordinate, that is, P1=K*H. After the coordinate information corresponding to the target information is obtained as P2 (X1, Y1), the coordinate information P2 (X1, Y1) corresponding to the target information is fused with the ciphertext P1 of the corresponding candidate coordinates to obtain the coordinate information corresponding to the target information. ciphertext C. For example, the coordinate information P2 (X1, Y1) corresponding to the target information can be added to the ciphertext P1 of the corresponding candidate coordinates to obtain the ciphertext C of the coordinate information corresponding to the target information, that is, C=P2+P1. In this way, the coordinate information corresponding to the target information is encrypted, and the ciphertext of the coordinate information corresponding to the target information is obtained.

S104, compressing the ciphertext of the coordinate information corresponding to the target information to obtain the compressed ciphertext corresponding to the target information.

S105, the compressed ciphertext corresponding to the target information is stored in the blockchain network.

In this embodiment of the present application, the coordinate information corresponding to the target information includes the first coordinate and the second coordinate. When the first coordinate and the second coordinate corresponding to the target information are stored in the blockchain network, the first coordinate corresponding to the target information and the second coordinate can be stored in the blockchain network. The first coordinate and the second coordinate are compressed. After obtaining the compressed ciphertext of the first coordinate and the second coordinate corresponding to the target information, storing the compressed ciphertext of the first coordinate and the second coordinate corresponding to the target information in the blockchain network can reduce the number of node devices in the blockchain. storage pressure and save storage space. At the same time, 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.

As shown in FIG. 3 , a schematic diagram of a method for compressing ciphertext of coordinate information corresponding to target information provided by an embodiment of the present application. As shown in FIG. 3 , the ciphertext of coordinate information corresponding to target information The steps of performing the compression processing method include S21 to S23.

S21: Acquire a data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the sum of the byte length of the first coordinate and the byte length of the second coordinate.

Obtain the data interception length, and intercept the ciphertext of the target information according to the data interception length. The data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate. The sum of the length and the byte length of the second coordinate. Wherein, since the second coordinate can be obtained according to the objective function and the first coordinate, the preset length of the ciphertext of the second coordinate can be stored, so that the ciphertext of the second coordinate can be obtained according to the preset length of the ciphertext of the second coordinate arts. For example, when the ciphertexts of multiple candidate second coordinates are obtained according to the objective function and the first coordinates, the ciphertexts with the second coordinates can be obtained from the ciphertexts of the multiple candidate second coordinates according to the preset length of the ciphertexts of the second coordinates. The ciphertext of the candidate second coordinate whose content in the preset length of the text matches is taken as the ciphertext of the second coordinate. The preset length of the ciphertext of the second coordinate may be half the length of the ciphertext of the second coordinate, or may be one third of the length of the ciphertext of the second coordinate, and so on.

S22: Continuously intercept the ciphertext whose length is the data interception length from the ciphertext of the coordinate information corresponding to the target information.

S23: Determine the ciphertext obtained by interception as the compressed ciphertext corresponding to the target information.

According to the data interception length, the ciphertext whose length is the data interception length is continuously intercepted from the ciphertext of the coordinate information corresponding to the target information, and the intercepted ciphertext is determined as the compressed ciphertext corresponding to the target information. Of course, since the target information is used as the first coordinate of the target point on the curve corresponding to the target function, the ciphertext obtained by intercepting must include the ciphertext of the first coordinate, and may also include the ciphertext of the preset length of the second coordinate. The purpose of continuous interception is to ensure that the intercepted ciphertext is continuous, so that the ciphertext of the target information can be accurately restored later.

Optionally, intercept the ciphertext of the first coordinate and the lowest digit of the ciphertext of the second coordinate from the ciphertext of the coordinate information corresponding to the target information; Determined to be the intercepted ciphertext.

Wherein, the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate may be intercepted from the ciphertext of the coordinate information corresponding to the target information. Since the target information is used as the first coordinate of the target point on the curve corresponding to the target function in this embodiment, the ciphertext of the first coordinate is intercepted from the ciphertext of the coordinate information corresponding to the target information according to the data interception length. Since the second coordinate can be obtained according to the expression of the curve corresponding to the objective function and the first coordinate, only the lowest bit of the ciphertext of the second coordinate can be intercepted, so as to obtain the lowest bit of the ciphertext according to the second coordinate to the second coordinate of the target information. The lowest digit of the ciphertext of the first coordinate and the ciphertext of the second coordinate is determined as the intercepted ciphertext. For example, after acquiring the ciphertext of the first coordinate and the ciphertext of the second coordinate corresponding to the target information, the ciphertext of the first coordinate and the ciphertext of the second coordinate are both 32 Bytes. According to the data interception length, continuously intercept the ciphertext of the first coordinate, and intercept the ciphertext of 1Byte length in the ciphertext of the second coordinate, and use the ciphertext of the first coordinate and the ciphertext of the second coordinate as the interception of 1Byte length. ciphertext. If the ciphertext of the first coordinate and the ciphertext of the second coordinate of the target information are not intercepted, a storage space of 64 Bytes is required to store the ciphertext of the target information, which easily leads to the problem of insufficient storage space. After intercepting the ciphertext of the first coordinate and the ciphertext of the second coordinate of the target information according to the data interception length, the compressed ciphertext of the target information is obtained. In this way, the compressed ciphertext of the target information only needs to occupy 33 Bytes of storage space. When the compressed ciphertext of the target information is stored in the blockchain network, the storage pressure of node devices in the blockchain network can be reduced and storage space can be saved.

Optionally, after the compressed ciphertext of the target information is stored in the blockchain network, the compressed ciphertext corresponding to the local target information of the terminal may be deleted. Since the compressed ciphertext of the target information is stored in the target block in the blockchain network, when the target information needs to be obtained, the compressed ciphertext of the target information can be obtained in the target block in the blockchain network. After the compressed ciphertext is decompressed and decrypted, the target information can be obtained. At the same time, since the information stored on the blockchain network cannot be tampered with, the target information can be obtained according to the compressed ciphertext of the target information in the target block in the blockchain network. Deleting the compressed ciphertext corresponding to the local target information of the terminal can reduce the local storage pressure of the terminal and save storage space.

This embodiment may be applicable to scenarios such as medical informatization and electronic information file management in the field of digital medical care. The above target information may refer to medical data of patients, such as medical images (link + access code), image annotation, prescription, diagnosis, treatment records, expense receipts, etc. By obtaining the coordinate information corresponding to the patient's medical data according to the objective function, encrypting the coordinate information corresponding to the patient's medical data, and then using the data interception length to intercept the ciphertext corresponding to the patient's medical data to obtain the corresponding data of the patient's medical data. Compressed ciphertext. The compressed ciphertext corresponding to the patient's medical data is stored in the blockchain network, which can reduce the storage space, improve the security of the patient's medical data, and realize the effective management of the patient's medical data.

In the embodiment of the present application, by acquiring the objective function for describing information and the target information to be processed, the coordinate information corresponding to the target information is determined from the curve of the objective function; the coordinate information of the target information is encrypted to obtain the corresponding coordinate information of the target information. The ciphertext of the coordinate information; the ciphertext corresponding to the target information is intercepted by the data interception length, and the compressed ciphertext corresponding to the target information is obtained. When the compressed ciphertext corresponding to the target information is stored, the ciphertext of the target information pair can be reduced. save storage space; store the compressed ciphertext corresponding to the target information in the blockchain network, which can effectively avoid storing the ciphertext of the target information locally in the terminal, resulting in the ciphertext of the target information being tampered with The ciphertext of the target information is decrypted to obtain the target message, which improves the security of the target information.

As shown in FIG. 4 , a schematic flowchart of another encryption method for compressing ciphertext of information provided by the present embodiment is shown in FIG. 4 . The schematic flowchart includes steps S201-S209.

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

S202: Determine the coordinate information corresponding to the target information from the curve of the target function.

S203: Encrypt the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information.

S204 , compress the ciphertext of the coordinate information corresponding to the target information, and obtain the compressed ciphertext corresponding to the target information.

S205, the compressed ciphertext corresponding to the target information is stored in the blockchain network.

In this embodiment of the present application, for the specific content of steps S201-S205, reference may be made to the content described in FIG. 2, which is not repeated here.

S206, receiving an acquisition request for target information.

S207: Acquire the compressed ciphertext corresponding to the target information from the blockchain network according to the acquisition request.

When an acquisition request for the target information is received, that is, a request for acquiring the plaintext content of the target information is received, the compressed ciphertext corresponding to the target information is acquired from the blockchain network for storing the target information according to the acquisition request.

Optionally, the above-mentioned acquisition request includes the information identifier of the target information, and the corresponding relationship between the information identifier and the block is obtained from the local storage; the target block for storing the compressed ciphertext corresponding to the target information is determined according to the corresponding relationship; Obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.

According to the information identifier of the target information, the corresponding relationship between the information identifier and the block is obtained from the local storage. Wherein, each information identifier has a corresponding storage block. According to the correspondence between the information identifier and the block, the target block for storing the compressed ciphertext of the target information is determined. From the information identifier of at least one candidate information in the target block in the blockchain network, the compressed ciphertext of the information matching the information identifier of the target information is obtained as the compressed ciphertext of the target information.

Optionally, when the compressed ciphertext of the target information is stored in the blockchain network, the target block used for storing the compressed ciphertext corresponding to the target information can be obtained; the relationship between the target block and the information identifier of the target information can be constructed. The corresponding relationship between the target block and the information identifier of the target information is stored in the local storage.

When the compressed ciphertext of the target information is stored in the blockchain network, the block identifier of the target block used to store the compressed ciphertext of the target information can be obtained, and the relationship between the information identifier of the target information and the block identifier of the target block can be constructed. and store the correspondence between the information identifier of the target information and the block identifier of the target block in the local storage. In this way, when the compressed ciphertext of the target information needs to be obtained, the compressed ciphertext of the target information can be quickly obtained.

S208 , decompress the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information.

S209 , decrypt the ciphertext of the coordinate information corresponding to the target information, obtain the coordinate information corresponding to the target information, and determine the target information according to the coordinate information corresponding to the target information.

After the compressed ciphertext of the target information is obtained, the compressed ciphertext of the target information is decompressed to obtain the ciphertext of the coordinate information corresponding to the target information. The ciphertext of the target information is decrypted according to the key of the target information to obtain coordinate information corresponding to the target information, and the target information is determined according to the coordinate information corresponding to the target information.

Optionally, the compressed ciphertext corresponding to the target information includes the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate, and the first coordinate and the second coordinate are coordinate information corresponding to the target information. The candidate second coordinate corresponding to the ciphertext of the first coordinate can be obtained from the curve of the objective function; the candidate second coordinate whose lowest position in the candidate second coordinate is the same as the lowest position of the ciphertext of the second coordinate is used as the candidate second coordinate. The ciphertext of the second coordinate; the ciphertext of the first coordinate and the ciphertext of the second coordinate are determined as the ciphertext of the coordinate information corresponding to the target information.

After decompressing the compressed ciphertext of the target information, the ciphertext of the first coordinate of the target information and the lowest bit of the ciphertext of the second coordinate of the target information are obtained. The first coordinate and the second coordinate are the coordinate information of the target information. The key corresponding to the target information can be obtained, and the ciphertext of the first coordinate is decrypted according to the key corresponding to the target information to obtain the first coordinate. According to the expression of the curve corresponding to the objective function and the first coordinate, a plurality of candidate second coordinates corresponding to the first coordinate are obtained. Decrypt the lowest bit of the ciphertext of the second coordinate to obtain the content of the lowest bit of the second coordinate. According to the content of the lowest bit of the second coordinate, the lowest bit of the multiple candidate second coordinates and the lowest bit of the second coordinate The candidate second coordinates with the same content are used as the second coordinates, and the coordinate information corresponding to the target information is determined according to the first coordinates and the second coordinates. For example, the curve corresponding to the objective function is the secp256K1 curve, the first coordinate in the objective information is the X coordinate of the target point on the secp256K1 curve, and the second coordinate in the objective information is the Y coordinate of the target point on the secp256K1 curve. Decrypt the ciphertext of the first coordinate, and after obtaining the first coordinate, obtain a plurality of candidate second coordinates according to the first coordinate and the expression of the secp256K1 curve. Since the secp256K1 curve is an elliptic curve, when solving according to one X coordinate, multiple candidate Y coordinate values will be obtained. Therefore, according to the lowest bit of the ciphertext of the second coordinate, among the multiple candidate coordinates, determine the value of the second coordinate. The content of the least significant bit is the same as the candidate Y coordinate as the second coordinate.

In the embodiment of the present application, by acquiring the objective function for describing information and the target information to be processed, the coordinate information corresponding to the target information is determined from the curve of the objective function; the coordinate information of the target information is encrypted to obtain the corresponding coordinate information of the target information. The ciphertext of the coordinate information; the ciphertext corresponding to the target information is intercepted by the data interception length, and the compressed ciphertext corresponding to the target information is obtained. When the compressed ciphertext corresponding to the target information is stored, the ciphertext of the target information pair can be reduced. save storage space; store the compressed ciphertext corresponding to the target information in the blockchain network, which can effectively avoid storing the ciphertext of the target information locally in the terminal, resulting in the ciphertext of the target information being tampered with The ciphertext of the target information is decrypted to obtain the target message, which improves the security of the target information. When the target information needs to be obtained, the compressed ciphertext corresponding to the target information can be decompressed to obtain the ciphertext of the coordinate information corresponding to the target information; the ciphertext of the coordinate information corresponding to the target information can be decrypted to obtain the target information.

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

The first obtaining module 11 is used to obtain the target function for describing information and target information to be processed.

The determining module 12 is configured to determine the coordinate information corresponding to the target information from the curve of the target function.

The encryption module 13 is configured to encrypt the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information.

Wherein, the encryption module 13 includes: a fourth acquisition unit, a generation unit, and an encryption unit.

a fourth obtaining unit, configured to obtain the user information of the target user corresponding to the target information;

a generating unit, configured to generate a key corresponding to the target information according to the user information;

The encryption unit is configured to encrypt the coordinate information corresponding to the target information by using the key corresponding to the target information, and obtain the ciphertext of the coordinate information corresponding to the target information.

The compression module 14 is configured to compress the ciphertext of the coordinate information corresponding to the target information, and obtain the compressed ciphertext corresponding to the target information.

The above-mentioned compression module 14 includes: a first obtaining unit, an intercepting unit, and a first determining unit.

a first obtaining unit, configured to obtain a data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate the sum of the length and the byte length of the second coordinate;

An interception unit, configured to continuously intercept the ciphertext whose length is the length of the data interception from the ciphertext of the coordinate information corresponding to the target information;

The first determining unit is configured to determine the intercepted ciphertext as the compressed ciphertext corresponding to the target information.

Wherein, the intercepting unit is specifically used for:

Intercept the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate from the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the first coordinate and the lowest digit of the ciphertext of the second coordinate are determined as the ciphertext obtained by interception.

The storage module 15 is configured to store the compressed ciphertext corresponding to the target information in the blockchain network.

Wherein, the coordinate information corresponding to the target information includes a first coordinate and a second coordinate;

Wherein, the device also includes:

a receiving module, configured to receive an acquisition request for the target information;

a second obtaining module, configured to obtain the compressed ciphertext corresponding to the target information from the blockchain network according to the obtaining request;

a decompression module, configured to perform decompression processing on the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

The decryption module is configured to decrypt the ciphertext of the coordinate information corresponding to the target information, obtain the coordinate information corresponding to the target information, and determine the target information according to the coordinate information corresponding to the target information.

The compressed ciphertext corresponding to the target information includes the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate, and the first coordinate and the second coordinate correspond to the target information coordinate information;

The decompression module includes:

a second obtaining unit, configured to obtain a candidate second coordinate corresponding to the ciphertext of the first coordinate from the curve of the objective function;

a second determining unit, configured to use the candidate second coordinate whose lowest bit is the same as the lowest bit of the ciphertext of the second coordinate as the ciphertext of the second coordinate;

The third determining unit is configured to determine the ciphertext of the first coordinate and the ciphertext of the second coordinate as the ciphertext of the coordinate information corresponding to the target information.

Wherein, the acquisition request includes the information identifier of the target information, and the second acquisition module includes:

The 4th determining unit is used to obtain the correspondence between the information identifier and the block from the local storage; According to the correspondence, determine the target block for storing the compressed ciphertext corresponding to the target information;

The third obtaining unit is configured to obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.

In the embodiment of the present application, by acquiring the objective function for describing information and the target information to be processed, the coordinate information corresponding to the target information is determined from the curve of the objective function; the coordinate information of the target information is encrypted to obtain the corresponding coordinate information of the target information. The ciphertext of the coordinate information; the ciphertext corresponding to the target information is intercepted by the data interception length, and the compressed ciphertext corresponding to the target information is obtained. When the compressed ciphertext corresponding to the target information is stored, the ciphertext of the target information pair can be reduced. save storage space; store the compressed ciphertext corresponding to the target information in the blockchain network, which can effectively avoid storing the ciphertext of the target information locally in the terminal, resulting in the ciphertext of the target information being tampered with The ciphertext of the target information is decrypted to obtain the target message, which improves the security of the target information. When the target information needs to be obtained, the compressed ciphertext corresponding to the target information can be decompressed to obtain the ciphertext of the coordinate information corresponding to the target information; the ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the target information.

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 may also be called a computer device, including a processor and a memory. Optionally, the electronic device may further include a network interface, and the processor is connected to the memory and the network interface. Further optionally, the network interface may include at least one of an input device and an output device, or the electronic device may further include at least one of 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 that compresses the ciphertext of information, that is, is used to perform the following operations:

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

Obtain the data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate and the second coordinate The sum of the byte lengths of ;

Continuously intercept the ciphertext whose length is the length of the data interception from the ciphertext of the coordinate information corresponding to the target information;

The intercepted ciphertext is determined as the compressed ciphertext corresponding to the target information.

receiving an acquisition request for the target information;

Obtain the compressed ciphertext corresponding to the target information from the blockchain network according to the obtaining request;

Decompressing the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the coordinate information corresponding to the target information, and the target information is determined according to the coordinate information corresponding to the target information.

Obtain a candidate second coordinate corresponding to the ciphertext of the first coordinate from the curve of the objective function;

Taking the candidate second coordinate whose lowest bit is the same as the lowest bit of the ciphertext of the second coordinate in the candidate second coordinate as the ciphertext of the second coordinate;

The ciphertext of the first coordinate and the ciphertext of the second coordinate are determined as the ciphertext of the coordinate information corresponding to the target information.

Obtain the correspondence between the information identifier and the block from the local storage; determine the target block for storing the compressed ciphertext corresponding to the target information according to the correspondence;

Obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.

obtaining the user information of the target user corresponding to the target information;

Generate a key corresponding to the target information according to the user information;

Using the key corresponding to the target information, the coordinate information corresponding to the target information is encrypted to obtain the ciphertext of the coordinate information corresponding to the target 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 for compressing the ciphertext of information provided in the embodiments of the present application, and can also execute The implementation manner of the electronic device described in the embodiments of the present application will not be repeated here.

In the embodiment of the present application, by acquiring the objective function used to describe the information and the target information to be processed, the coordinate information corresponding to the target information is determined from the curve of the objective function; the coordinate information of the target information is encrypted to obtain the corresponding coordinate information of the target information. The ciphertext of the coordinate information; the ciphertext corresponding to the target information is intercepted by the data interception length, and the compressed ciphertext corresponding to the target information is obtained. When the compressed ciphertext corresponding to the target information is stored, the ciphertext of the target information pair can be reduced. save storage space; store the compressed ciphertext corresponding to the target information in the blockchain network, which can effectively avoid storing the ciphertext of the target information locally in the terminal, resulting in the ciphertext of the target information being tampered with The ciphertext of the target information is decrypted to obtain the target message, which improves the security of the target information. When the target information needs to be obtained, the compressed ciphertext corresponding to the target information can be decompressed to obtain the ciphertext of the coordinate information corresponding to the target information; the ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the target information.

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 for compressing the ciphertext of information shown in the embodiment.

Optionally, the storage medium involved in the present application may be a readable storage medium, and the storage medium involved in the present 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 the electronic device. The computer-readable storage medium may also be an external storage device of the electronic device, such as a plug-in hard disk equipped on the electronic 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 electronic 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 electronic 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. 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 electronic 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 electronic devices and methods 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 for compressing ciphertext of information, comprising:

Obtain the objective function used to describe the information, and the target information to be processed;

Determine the coordinate information corresponding to the target information from the curve of the target function;

Encrypting the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

compressing the ciphertext of the coordinate information corresponding to the target information to obtain the compressed ciphertext corresponding to the target information;

The compressed ciphertext corresponding to the target information is stored in the blockchain network.
The method according to claim 1, wherein the coordinate information corresponding to the target information includes a first coordinate and a second coordinate; the ciphertext of the coordinate information corresponding to the target information is compressed to obtain the target The compressed ciphertext corresponding to the information, including:

Obtain the data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate and the second coordinate The sum of the byte lengths of ;

Continuously intercept the ciphertext whose length is the length of the data interception from the ciphertext of the coordinate information corresponding to the target information;

The intercepted ciphertext is determined as the compressed ciphertext corresponding to the target information.
The method according to claim 2, wherein the continuously intercepting the ciphertext whose length is the data interception length from the ciphertext of the coordinate information corresponding to the target information comprises:

Intercept the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate from the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the first coordinate and the lowest digit of the ciphertext of the second coordinate are determined as the ciphertext obtained by interception.
The method of claim 3, wherein the method further comprises:

receiving an acquisition request for the target information;

Obtain the compressed ciphertext corresponding to the target information from the blockchain network according to the obtaining request;

Decompressing the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the coordinate information corresponding to the target information, and the target information is determined according to the coordinate information corresponding to the target information.
The method according to claim 4, wherein the compressed ciphertext corresponding to the target information comprises the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate, the first coordinate and the ciphertext of the second coordinate The second coordinate is the coordinate information corresponding to the target information;

Decompressing the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information, including:

Obtain a candidate second coordinate corresponding to the ciphertext of the first coordinate from the curve of the objective function;

Taking the candidate second coordinate whose lowest bit is the same as the lowest bit of the ciphertext of the second coordinate in the candidate second coordinate as the ciphertext of the second coordinate;

The ciphertext of the first coordinate and the ciphertext of the second coordinate are determined as the ciphertext of the coordinate information corresponding to the target information.
The method according to claim 4, wherein the acquisition request includes an information identifier of the target information, and the compressed ciphertext corresponding to the target information is acquired from the blockchain network according to the acquisition request ,include:

Obtain the correspondence between the information identifier and the block from the local storage; determine the target block for storing the compressed ciphertext corresponding to the target information according to the correspondence;

Obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.
The method according to claim 1, wherein the encrypting the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information, comprising:

obtaining the user information of the target user corresponding to the target information;

Generate a key corresponding to the target information according to the user information;

Using the key corresponding to the target information, the coordinate information corresponding to the target information is encrypted to obtain the ciphertext of the coordinate information corresponding to the target information.
An encryption device for compressing ciphertext of information, comprising:

The first acquisition module is used to acquire the target function used to describe the information, and the target information to be processed;

A determination module, for determining the coordinate information corresponding to the target information from the curve of the target function;

an encryption module, configured to encrypt the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

a compression module, configured to compress the ciphertext of the coordinate information corresponding to the target information, and obtain the compressed ciphertext corresponding to the target information;

The storage module is used for storing the compressed ciphertext corresponding to 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 target information to be processed;

Determine the coordinate information corresponding to the target information from the curve of the target function;

Encrypting the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

compressing the ciphertext of the coordinate information corresponding to the target information to obtain the compressed ciphertext corresponding to the target information;

The compressed ciphertext corresponding to the target information is stored in the blockchain network.
The computer device according to claim 9, wherein the coordinate information corresponding to the target information includes a first coordinate and a second coordinate; performing the compression process on the ciphertext of the coordinate information corresponding to the target information to obtain the obtained The compressed ciphertext corresponding to the target information, including:

Obtain the data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate and the second coordinate The sum of the byte lengths of ;

Continuously intercept the ciphertext whose length is the length of the data interception from the ciphertext of the coordinate information corresponding to the target information;

The intercepted ciphertext is determined as the compressed ciphertext corresponding to the target information.
The computer device according to claim 10, wherein performing the continuous interception of the ciphertext whose length is the data interception length from the ciphertext of the coordinate information corresponding to the target information comprises:

Intercept the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate from the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the first coordinate and the lowest digit of the ciphertext of the second coordinate are determined as the ciphertext obtained by interception.
The computer device of claim 11, wherein the processor is further configured to perform:

receiving an acquisition request for the target information;

Obtain the compressed ciphertext corresponding to the target information from the blockchain network according to the obtaining request;

Decompressing the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the coordinate information corresponding to the target information, and the target information is determined according to the coordinate information corresponding to the target information.
The computer device according to claim 12, wherein the compressed ciphertext corresponding to the target information comprises the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate, the first coordinate and the The second coordinate is the coordinate information corresponding to the target information;

Execute the described decompression process to the compressed ciphertext corresponding to the target information, obtain the ciphertext of the coordinate information corresponding to the target information, including:

Obtain a candidate second coordinate corresponding to the ciphertext of the first coordinate from the curve of the objective function;

Using the candidate second coordinate whose lowest bit is the same as the lowest bit of the ciphertext of the second coordinate in the candidate second coordinate as the ciphertext of the second coordinate;

The ciphertext of the first coordinate and the ciphertext of the second coordinate are determined as the ciphertext of the coordinate information corresponding to the target information.
The computer device according to claim 12, wherein the obtaining request includes an information identifier of the target information, and performing the compression corresponding to obtaining the target information from the blockchain network according to the obtaining request Ciphertext, including:

Obtain the correspondence between the information identifier and the block from the local storage; determine the target block for storing the compressed ciphertext corresponding to the target information according to the correspondence;

Obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.
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 target information to be processed;

Determine the coordinate information corresponding to the target information from the curve of the target function;

Encrypting the coordinate information of the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

compressing the ciphertext of the coordinate information corresponding to the target information to obtain the compressed ciphertext corresponding to the target information;

The compressed ciphertext corresponding to the target information is stored in the blockchain network.
The computer-readable storage medium according to claim 15, wherein the coordinate information corresponding to the target information includes a first coordinate and a second coordinate; and performing the compression process on the ciphertext of the coordinate information corresponding to the target information , obtain the compressed ciphertext corresponding to the target information, including:

Obtain the data interception length, where the data interception length is greater than the byte length of the first coordinate, or greater than the byte length of the second coordinate, and less than the byte length of the first coordinate and the second coordinate The sum of the byte lengths of ;

Continuously intercept the ciphertext whose length is the length of the data interception from the ciphertext of the coordinate information corresponding to the target information;

The intercepted ciphertext is determined as the compressed ciphertext corresponding to the target information.
The computer-readable storage medium according to claim 16, wherein performing the continuously intercepting the ciphertext whose length is the data interception length from the ciphertext of the coordinate information corresponding to the target information comprises:

Intercept the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate from the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the first coordinate and the lowest digit of the ciphertext of the second coordinate are determined as the ciphertext obtained by interception.
The computer-readable storage medium of claim 17, wherein the program instructions, when executed by the processor, are further configured to perform:

receiving an acquisition request for the target information;

Obtain the compressed ciphertext corresponding to the target information from the blockchain network according to the obtaining request;

Decompressing the compressed ciphertext corresponding to the target information to obtain the ciphertext of the coordinate information corresponding to the target information;

The ciphertext of the coordinate information corresponding to the target information is decrypted to obtain the coordinate information corresponding to the target information, and the target information is determined according to the coordinate information corresponding to the target information.
The computer-readable storage medium according to claim 18, wherein the compressed ciphertext corresponding to the target information comprises the ciphertext of the first coordinate and the lowest bit of the ciphertext of the second coordinate, the first coordinate The coordinates and the second coordinates are the coordinate information corresponding to the target information;

Execute the described decompression process to the compressed ciphertext corresponding to the target information, obtain the ciphertext of the coordinate information corresponding to the target information, including:

Obtain a candidate second coordinate corresponding to the ciphertext of the first coordinate from the curve of the objective function;

Using the candidate second coordinate whose lowest bit is the same as the lowest bit of the ciphertext of the second coordinate in the candidate second coordinate as the ciphertext of the second coordinate;

The ciphertext of the first coordinate and the ciphertext of the second coordinate are determined as the ciphertext of the coordinate information corresponding to the target information.
The computer-readable storage medium according to claim 18, wherein the obtaining request includes an information identifier of the target information, and executing the obtaining of the target information from the blockchain network according to the obtaining request The corresponding compressed ciphertext, including:

Obtain the correspondence between the information identifier and the block from the local storage; determine the target block for storing the compressed ciphertext corresponding to the target information according to the correspondence;

Obtain the compressed ciphertext corresponding to the target information from the target block in the blockchain network.