CN115694778A - Tobacco data cross-domain secure circulation method and system - Google Patents
Tobacco data cross-domain secure circulation method and system Download PDFInfo
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- CN115694778A CN115694778A CN202211116008.5A CN202211116008A CN115694778A CN 115694778 A CN115694778 A CN 115694778A CN 202211116008 A CN202211116008 A CN 202211116008A CN 115694778 A CN115694778 A CN 115694778A
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Abstract
The invention provides a tobacco data cross-domain secure circulation method and a system, wherein the tobacco data cross-domain secure circulation method comprises the following steps: s101: encrypting tobacco plaintext data transmitted by a tobacco data carrier to generate ciphertext tobacco data, and transmitting the ciphertext tobacco data to a central processing server, wherein the central processing server also receives enterprise data, joint analysis processing is carried out on the ciphertext tobacco data and the enterprise data by adopting a homomorphic encryption algorithm to generate a ciphertext analysis result, and the enterprise data comprises at least one of plaintext data and encrypted data; s102: and receiving the ciphertext analysis result, and decrypting the ciphertext analysis result to generate a plaintext analysis result. The method can avoid the leakage and the abuse of sensitive data when the tobacco data value is improved through data mining, and ensure the safety of cross-domain circulation of the tobacco data.
Description
Technical Field
The invention relates to the technical field of tobacco data security, in particular to a tobacco data cross-domain secure circulation method and a tobacco data cross-domain secure circulation system.
Background
With the overall advance of digital transformation, a great amount of personal privacy data including tobacco grower personal information, consumer personal information, retail customer basic information, management information and the like are accumulated in each business line of tobacco. These data dimensions and indices are limited and are only used inside tobacco, and their intrinsic value cannot be fully exploited. Therefore, all units in the tobacco industry are greatly promoted to combine and analyze and mine tobacco data and external enterprise data so as to improve the value of the tobacco data to the maximum extent.
However, the biggest problems encountered by tobacco data in fusing external data are privacy disclosure and data abuse. On one hand, a large amount of sensitive data related to individual privacy exist in the tobacco, and once the sensitive data are revealed, serious harm is caused, so that the public trust of the tobacco industry is greatly influenced. On the other hand, if the tobacco data is not strictly protected, the tobacco data can be abused by lawless persons in the using process, and the rights and interests of the tobacco are seriously harmed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a tobacco data cross-domain secure circulation method and a system, before data is sent to a central processing server, tobacco plaintext data is encrypted to generate ciphertext tobacco data, joint analysis and excavation are carried out on the ciphertext tobacco data and enterprise data in the central processing server through a homomorphic encryption algorithm, and a ciphertext analysis result is transmitted to the tobacco encryption server for decryption analysis, so that leakage and abuse of sensitive data can be avoided when the value of the tobacco data is improved through data excavation, and the safety of cross-domain circulation of the tobacco data is ensured.
In order to solve the above problems, the present invention adopts a technical solution as follows: a tobacco data cross-domain secure circulation method comprises the following steps: s101: encrypting tobacco plaintext data transmitted by a tobacco data carrier to generate ciphertext tobacco data, and transmitting the ciphertext tobacco data to a central processing server, wherein the central processing server receives enterprise data and ciphertext tobacco data, joint analysis processing is carried out on the ciphertext tobacco data and the enterprise data by adopting a homomorphic encryption algorithm to generate a ciphertext analysis result, and the enterprise data comprises at least one of plaintext data and encrypted data; s102: and receiving the ciphertext analysis result, and decrypting the ciphertext analysis result to generate a plaintext analysis result.
Further, the tobacco plaintext data comprises product and market data, supply chain data, function management data and monopoly management data.
Further, the step of encrypting the tobacco plaintext data transmitted by the tobacco data carrier to generate ciphertext tobacco data specifically includes: and the tobacco encryption server generates a public and private key pair, and encrypts the tobacco plaintext data by using a public key in the public and private key pair to generate ciphertext tobacco data.
Further, the step of receiving the enterprise data and the ciphertext tobacco data by the central processing server further comprises: the method comprises the steps that a data source corresponding to enterprise data obtains the type of plaintext data to be transmitted, and whether the type meets a preset condition is judged; if so, encrypting the plaintext data by adopting the public key to generate encrypted data, and transmitting the encrypted data to a central processing server; and if not, sending the plaintext data to a central processing server.
Further, the step of performing joint analysis processing on the ciphertext tobacco data and the enterprise data by using a homomorphic encryption algorithm to generate a ciphertext analysis result specifically includes: and acquiring application scenes of the ciphertext tobacco data and the enterprise data, and selecting a calculation model to perform combined analysis processing on the ciphertext tobacco data and the enterprise data based on the application scenes to generate a ciphertext analysis result.
And further, performing joint analysis processing on the ciphertext tobacco data and the enterprise data by adopting addition homomorphic calculation and multiplication homomorphic calculation to generate a ciphertext analysis result.
Based on the same inventive concept, the invention also provides a tobacco data cross-domain safe circulation system, which comprises a tobacco encryption server, an enterprise server and a central processing server, wherein the central processing server is in communication connection with the tobacco encryption server and the enterprise server respectively; the tobacco encryption server generates a public and private key pair, discloses a public key in the public and private key pair, holds the private key, encrypts tobacco plaintext data transmitted by a tobacco data carrier through the public key to generate ciphertext tobacco data, transmits the ciphertext tobacco data to the central processing server, receives a ciphertext analysis result transmitted by the central processing server, and decrypts the ciphertext analysis result by using the private key to generate a plaintext analysis result; the enterprise server transmits enterprise data to the central processing server, wherein the enterprise data comprises at least one of plaintext data and encrypted data; and the central processing server performs combined analysis processing on the ciphertext tobacco data and the enterprise data by adopting a homomorphic encryption algorithm to generate a ciphertext analysis result.
Further, the tobacco encryption server comprises a tobacco data source module and an encryption module, wherein the tobacco data source module is connected with a tobacco data carrier and transmits tobacco plaintext data transmitted by the tobacco data carrier to the encryption module; the encryption module encrypts the tobacco plaintext data to generate ciphertext tobacco data, transmits the ciphertext tobacco data to the central processing server, receives a ciphertext analysis result transmitted by the central processing server, and decrypts the ciphertext analysis result to generate a plaintext analysis result.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, cross-domain safe circulation and sharing from the internal domain to the external domain can be realized on the premise of ensuring the safety and legal compliance of the tobacco data, the blank of the field is filled, the value of the tobacco data is favorably and fully mined, meanwhile, the private key is arranged in the tobacco encryption server, the tobacco data analysis result can be decrypted only in the tobacco, and the risk of tobacco data leakage is completely isolated.
Drawings
FIG. 1 is a flowchart of an embodiment of a cross-domain secure circulation method of tobacco data according to the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a cross-domain secure tobacco data circulation method according to the present invention;
FIG. 3 is a block diagram of a tobacco encryption server of the cross-domain secure circulation system for tobacco data according to an embodiment of the present invention;
FIG. 4 is a block diagram of an embodiment of a cross-domain secure circulation system for tobacco data according to the present invention;
FIG. 5 is a block diagram of another embodiment of the tobacco data cross-domain secure distribution system of the present invention.
Detailed Description
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It should be noted that the various embodiments of the present disclosure, described and illustrated in the figures herein generally, may be combined with each other without conflict, and that the structural components or functional modules therein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the disclosure, provided in the accompanying drawings, is not intended to limit the scope of the disclosure, as claimed, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the scope of protection of the present disclosure.
The terminology used in the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1-2, fig. 1 is a flowchart illustrating a cross-domain secure circulation method of tobacco data according to an embodiment of the present invention; FIG. 2 is a flowchart illustrating an embodiment of a cross-domain secure circulation method for tobacco data according to the present invention. The tobacco data cross-domain secure circulation method of the invention is explained by combining with the figures 1-2.
In this embodiment, the device for performing the cross-domain secure circulation method of tobacco data is a tobacco encryption server, and the cross-domain secure circulation method of tobacco data performed by the tobacco encryption server includes:
s101: the tobacco plaintext data transmitted by the tobacco data carrier is encrypted to generate ciphertext tobacco data, the ciphertext tobacco data is transmitted to the central processing server, the central processing server further receives enterprise data, joint analysis processing is carried out on the ciphertext tobacco data and the enterprise data through a homomorphic encryption algorithm to generate a ciphertext analysis result, and the enterprise data comprises at least one of plaintext data and encrypted data.
In this embodiment, the tobacco data carrier is a storage device connected to the tobacco encryption server, where the storage device may be a solid storage device such as a U disk and a solid state disk, or may also be a virtual storage device such as a database and a storage partition for storing tobacco data files. The tobacco encryption server is connected with the tobacco data carrier and acquires tobacco plaintext data from the tobacco data carrier according to the instruction of the user.
Specifically, the tobacco encryption server comprises a tobacco data source module and an encryption module, wherein the tobacco data source module is connected with the tobacco data carriers to manage different tobacco data carriers and manage tobacco metadata (namely tobacco plaintext data) in the tobacco data carriers. The encryption module encrypts the tobacco data transmitted by the tobacco data source module.
In the present embodiment, the tobacco plaintext data includes product and market data, supply chain data, function management data, monopoly management data, and other data related to tobacco production to sale. The product and market data comprise cigarette product data, retailer data, consumer data, tobacco grower data and other data related to products and markets, the supply chain data comprise cigarette sales plan data, cigarette marketing management data, logistics management data, tobacco management data and other supply chain related data, the function management data comprise financial management data, human resource management data, office management data, purchasing management data, safety management data and other data related to functions, and the monopoly management data comprise monopoly permission data, monopoly case data and other data. And the tobacco data source module acquires tobacco plaintext data matched with the user requirements from the corresponding tobacco data carrier according to the user requirements.
The method for encrypting the tobacco plaintext data transmitted by the tobacco data carrier to generate ciphertext tobacco data specifically comprises the following steps: and generating a public and private key pair, and encrypting the tobacco plaintext data by using a public key in the public and private key pair to generate ciphertext tobacco data.
Specifically, the tobacco encryption server generates a public and private key pair by using a homomorphic encryption algorithm, and sends a public key to the central processing server and an enterprise server which needs to encrypt data. And after the tobacco plaintext data needing to be encrypted is obtained, the tobacco plaintext data is encrypted through the public key to generate ciphertext tobacco data.
In the present embodiment, homomorphic encryption algorithms used include semi-homomorphic encryption algorithms (RSA, EIGamal, paillier) and homomorphic-like encryption algorithms (Boneh-Goh-nissm).
The step of receiving the enterprise data and the ciphertext tobacco data by the central processing server further comprises the following steps: the method comprises the steps that a data source corresponding to enterprise data obtains the type of plaintext data to be transmitted, and whether the type meets preset conditions or not is judged; if so, encrypting the plaintext data by adopting a public key to generate encrypted data, and transmitting the encrypted data to a central processing server; if not, the plaintext data is sent to the central processing server. The predetermined condition is typically the security level of the data. In the case of confidential data and confidential data, encryption must be performed. If the data is normal data, the data may not be encrypted.
In other embodiments, a security level may also be set for data in the enterprise database, based on which it is determined whether to encrypt it. The security level of a data transmission line adopted between the enterprise server and the central processing server can be obtained, whether the security level is larger than a preset level or not is judged, if yes, plaintext data are not encrypted and are directly sent to the central processing server, and if not, the plaintext data are encrypted to generate encrypted data, and the encrypted data are sent to the central processing server.
In this embodiment, the step of performing a joint analysis process on the ciphertext tobacco data and the enterprise data by using a homomorphic encryption algorithm to generate a ciphertext analysis result specifically includes: and acquiring application scenes of the ciphertext tobacco data and the enterprise data, and selecting a calculation model to perform combined analysis processing on the ciphertext tobacco data and the enterprise data based on the application scenes to generate a ciphertext analysis result. The functions used by different calculation models are different, the functions are used for analyzing the ciphertext tobacco data and the enterprise data, and the joint analysis and mining of the data are realized on the basis of not decrypting the data through a homomorphic encryption algorithm.
Specifically, the ciphertext tobacco data and the enterprise data are subjected to combined analysis processing by adopting addition homomorphic calculation and multiplication homomorphic calculation to generate a ciphertext analysis result.
S102: and receiving the ciphertext analysis result, and decrypting the ciphertext analysis result to generate a plaintext analysis result.
And after receiving the ciphertext analysis result transmitted by the central processing server, the tobacco encryption server decrypts the ciphertext analysis result by using a private key in the public and private key pair to obtain a plaintext analysis result.
In a specific embodiment, the enterprise server includes an enterprise server a and an enterprise server B, the tobacco encryption server and the tobacco data carrier are located in the tobacco internal domain, the enterprise B database and the encryption server of the enterprise server B are located in the enterprise B internal domain, and the tobacco data cross-domain secure circulation method is described through the data encryption and analysis processes of the tobacco encryption server, the enterprise server a and the enterprise server B.
Tobacco encryption
Specifically, the tobacco data carrier transmits the tobacco plaintext data to the tobacco encryption server; the tobacco encryption server encrypts the tobacco data by using the public key; the tobacco encryption server transmits the ciphertext tobacco data to an external central processing server; an enterprise B database in the enterprise server B transmits plaintext data to an encryption server connected with the enterprise server B; the encryption server encrypts plaintext data by using the public key and transmits encrypted data generated by encryption to an external central processing server; the enterprise server A transmits plaintext data to the central processing server (mainly used for distinguishing enterprises B, namely the central processing server supports both a full ciphertext mode and a plaintext and ciphertext mixed mode for processing the data); the central processing server performs joint analysis and processing on the tobacco ciphertext data, the enterprise B ciphertext data and the enterprise A plaintext data by using a homomorphic encryption algorithm to obtain a ciphertext analysis result; the central processing server transmits the ciphertext analysis result to the tobacco encryption server; and the tobacco encryption server decrypts the ciphertext analysis result by using the private key to obtain a plaintext analysis result.
Based on the same inventive concept, the present invention further provides a tobacco data cross-domain secure circulation system, please refer to fig. 3, fig. 4, and fig. 5, fig. 3 is a structural diagram of an embodiment of a tobacco encryption server of the tobacco data cross-domain secure circulation system of the present invention; FIG. 4 is a block diagram of an embodiment of a cross-domain secure circulation system for tobacco data according to the present invention; fig. 5 is a structural diagram of another embodiment of the tobacco data cross-domain secure circulation system of the present invention, and the tobacco data cross-domain secure circulation system of the present invention is described with reference to fig. 3, fig. 4, and fig. 5.
In this embodiment, the tobacco data cross-domain secure circulation system includes a tobacco encryption server, an enterprise server, and a central processing server, where the central processing server is in communication connection with the tobacco encryption server and the enterprise server, respectively; the tobacco encryption server generates a public and private key pair, a public key in the public and private key pair is disclosed, the private key is held, tobacco plaintext data transmitted by a tobacco data carrier is encrypted through the public key to generate ciphertext tobacco data, the ciphertext tobacco data is transmitted to the central processing server, a ciphertext analysis result transmitted by the central processing server is received, and the ciphertext analysis result is decrypted by the private key to generate a plaintext analysis result; the enterprise server transmits enterprise data to the central processing server, wherein the enterprise data comprises at least one of plaintext data and encrypted data; the central processing server adopts a homomorphic encryption algorithm to carry out combined analysis processing on the ciphertext tobacco data and the enterprise data to generate a ciphertext analysis result.
Further, the tobacco encryption server comprises a tobacco data source module and an encryption module, wherein the tobacco data source module is connected with the tobacco data carrier and transmits the tobacco plaintext data transmitted by the tobacco data carrier to the encryption module; the encryption module encrypts the tobacco plaintext data to generate ciphertext tobacco data, transmits the ciphertext tobacco data to the central processing server, receives a ciphertext analysis result transmitted by the central processing server, and decrypts the ciphertext analysis result to generate a plaintext analysis result.
In this embodiment, the tobacco data carrier is a storage device connected to the tobacco encryption server, where the storage device may be a solid storage device such as a U disk and a solid state disk, or may also be a virtual storage device such as a database and a storage partition for storing tobacco data files. The tobacco encryption server is connected with the tobacco data carrier, and acquires tobacco plaintext data from the tobacco data carrier according to the instruction of the user.
In the present embodiment, the tobacco plaintext data includes product and market data, supply chain data, function management data, monopoly management data, and other data related to tobacco production to sale. The product and market data comprise cigarette product data, retailer data, consumer data, tobacco grower data and other data related to products and markets, the supply chain data comprise cigarette sales plan data, cigarette marketing management data, logistics management data, tobacco management data and other supply chain related data, the function management data comprise financial management data, human resource management data, office management data, purchasing management data, safety management data and other data related to functions, and the monopoly management data comprise monopoly permission data, monopoly case data and other data. And the tobacco data source module acquires tobacco plaintext data matched with the user requirements from the corresponding tobacco data carrier according to the user requirements.
The method for encrypting the tobacco plaintext data transmitted by the tobacco data carrier to generate ciphertext tobacco data specifically comprises the following steps: and the tobacco encryption server generates a public and private key pair, and encrypts the tobacco plaintext data by using a public key in the public and private key pair to generate ciphertext tobacco data.
Specifically, the tobacco encryption server generates a public and private key pair by using a homomorphic encryption algorithm, and sends a public key to the central processing server and an enterprise server which needs to encrypt data. And after the tobacco plaintext data needing to be encrypted is obtained, the tobacco plaintext data is encrypted through the public key to generate ciphertext tobacco data.
In the present embodiment, the homomorphic encryption algorithms used include a semi-homomorphic encryption algorithm (RSA, EIGamal, paillier) and a homomorphic-like encryption algorithm (Boneh-Goh-nissm).
The step of receiving the enterprise data and the ciphertext tobacco data by the central processing server further comprises the following steps: the method comprises the steps that a data source corresponding to enterprise data obtains the type of plaintext data to be transmitted, and whether the type meets preset conditions or not is judged; if so, encrypting the plaintext data by adopting a public key to generate encrypted data, and transmitting the encrypted data to a central processing server; if not, the plaintext data is sent to the central processing server. The predetermined condition is typically a security classification of the data. In the case of confidential data and confidential data, encryption must be performed. If the data is normal data, the data may not be encrypted.
In other embodiments, a security level may also be set for data in the enterprise database, based on which it is determined whether to encrypt it. The security level of a data transmission line adopted between the enterprise server and the central processing server can be obtained, whether the security level is larger than a preset level or not is judged, if yes, plaintext data are not encrypted and are directly sent to the central processing server, and if not, the plaintext data are encrypted to generate encrypted data, and the encrypted data are sent to the central processing server.
In this embodiment, the step of performing joint analysis processing on the ciphertext tobacco data and the enterprise data by using a homomorphic encryption algorithm to generate a ciphertext analysis result specifically includes: and acquiring application scenes of the ciphertext tobacco data and the enterprise data, and selecting a calculation model to perform combined analysis processing on the ciphertext tobacco data and the enterprise data based on the application scenes to generate a ciphertext analysis result. The functions used by different calculation models are different, the functions are used for analyzing the ciphertext tobacco data and the enterprise data, and the joint analysis and mining of the data are realized on the basis of not decrypting the data through a homomorphic encryption algorithm.
Specifically, the ciphertext tobacco data and the enterprise data are subjected to combined analysis processing by adopting addition homomorphic calculation and multiplication homomorphic calculation to generate a ciphertext analysis result.
And after receiving the ciphertext analysis result transmitted by the central processing server, the tobacco encryption server decrypts the ciphertext analysis result by using a private key in the public and private key pair to obtain a plaintext analysis result.
In a specific embodiment, the enterprise server includes an enterprise server a and an enterprise server B, and the tobacco data cross-domain secure circulation method of the present invention is explained through data encryption and analysis processes of the tobacco encryption server, the enterprise server a and the enterprise server B.
Specifically, the tobacco data carrier transmits the tobacco plaintext data to the tobacco encryption server; the tobacco encryption server encrypts the tobacco data by using the public key; the tobacco encryption server transmits the ciphertext tobacco data to an external central processing server; the data in the enterprise server B transmits plaintext data to the encryption server connected with the data transmission device; the encryption server encrypts plaintext data by using the public key and transmits encrypted data generated by encryption to an external central processing server; the enterprise server A transmits plaintext data to the central processing server (mainly used for distinguishing enterprises B, namely the central processing server supports both a full ciphertext mode and a plaintext and ciphertext mixed mode for processing the data); the central processing server performs joint analysis and processing on the tobacco ciphertext data, the enterprise B ciphertext data and the enterprise A plaintext data by using a homomorphic encryption algorithm to obtain a ciphertext analysis result; the central processing server transmits the ciphertext analysis result to the tobacco encryption server; and the tobacco encryption server decrypts the ciphertext analysis result by using the private key to obtain a plaintext analysis result.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A tobacco data cross-domain secure circulation method is characterized by comprising the following steps:
s101: encrypting tobacco plaintext data transmitted by a tobacco data carrier to generate ciphertext tobacco data, and transmitting the ciphertext tobacco data to a central processing server, wherein the central processing server receives enterprise data and ciphertext tobacco data, joint analysis processing is carried out on the ciphertext tobacco data and the enterprise data by adopting a homomorphic encryption algorithm to generate a ciphertext analysis result, and the enterprise data comprises at least one of plaintext data and encrypted data;
s102: and receiving the ciphertext analysis result, and decrypting the ciphertext analysis result to generate a plaintext analysis result.
2. The method of cross-domain secure circulation of tobacco data according to claim 1, wherein said tobacco plaintext data comprises product and market data, supply chain data, function management data, and monopoly management data.
3. The tobacco data cross-domain secure circulation method according to claim 1, wherein the step of encrypting the tobacco plaintext data transmitted by the tobacco data carrier to generate ciphertext tobacco data specifically comprises:
and the tobacco encryption server generates a public and private key pair, and encrypts the tobacco plaintext data by using a public key in the public and private key pair to generate ciphertext tobacco data.
4. The tobacco data cross-domain secure circulation method according to claim 3, wherein the step of receiving the enterprise data and the ciphertext tobacco data by the central processing server further comprises:
the method comprises the steps that a data source corresponding to enterprise data obtains the type of plaintext data to be transmitted, and whether the type meets a preset condition is judged;
if so, encrypting the plaintext data by adopting the public key to generate encrypted data, and transmitting the encrypted data to a central processing server;
and if not, sending the plaintext data to a central processing server.
5. The tobacco data cross-domain secure circulation method according to claim 1, wherein the step of performing joint analysis processing on the ciphertext tobacco data and the enterprise data by using a homomorphic encryption algorithm to generate a ciphertext analysis result specifically comprises:
and acquiring application scenes of the ciphertext tobacco data and the enterprise data, and selecting a calculation model to perform combined analysis processing on the ciphertext tobacco data and the enterprise data based on the application scenes to generate a ciphertext analysis result.
6. The cross-domain secure circulation method of tobacco data according to claim 5, wherein ciphertext analysis results are generated by performing combined analysis processing on the ciphertext tobacco data and the enterprise data through addition homomorphism calculation and multiplication homomorphism calculation.
7. A tobacco data cross-domain safe circulation system is characterized by comprising a tobacco encryption server, an enterprise server and a central processing server, wherein the central processing server is in communication connection with the tobacco encryption server and the enterprise server respectively;
the tobacco encryption server generates a public and private key pair, discloses a public key in the public and private key pair, holds the private key, encrypts tobacco plaintext data transmitted by a tobacco data carrier through the public key to generate ciphertext tobacco data, transmits the ciphertext tobacco data to the central processing server, receives a ciphertext analysis result transmitted by the central processing server, and decrypts the ciphertext analysis result by using the private key to generate a plaintext analysis result;
the enterprise server transmits enterprise data to the central processing server, wherein the enterprise data comprises at least one of plaintext data and encrypted data;
and the central processing server performs combined analysis processing on the ciphertext tobacco data and the enterprise data by adopting a homomorphic encryption algorithm to generate a ciphertext analysis result.
8. The tobacco data cross-domain secure circulation system according to claim 7, wherein the tobacco encryption server comprises a tobacco data source module and an encryption module, the tobacco data source module is connected with a tobacco data carrier, and transmits tobacco plaintext data transmitted by the tobacco data carrier to the encryption module;
the encryption module encrypts the tobacco plaintext data to generate ciphertext tobacco data, transmits the ciphertext tobacco data to the central processing server, receives a ciphertext analysis result transmitted by the central processing server, and decrypts the ciphertext analysis result to generate a plaintext analysis result.
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