Conversion method and system for encrypted drawing data

Abstract

The invention relates to the technical field of document management, in particular to an encrypted drawing data conversion method and system.The encrypted drawing data conversion system comprises a drawing uploading module, a drawing analysis module, a drawing recognition module, a drawing optimization module, a format conversion module, an encryption transmission unit, a storage module, a review module and a client side; the drawing analysis module is connected with the drawing uploading module, the drawing identification module is arranged between the drawing analysis module and the drawing optimization module, the format conversion module is connected with the drawing optimization module, and the encryption transmission unit is connected with the format conversion module and the storage module. In this way, the technical problems that in the prior art, when an online review mode is adopted to review CAD drawings, reviews usually need to install corresponding CAD drawing viewing software on a computer, the preparation workload before review is increased, and the review process is possibly delayed due to the software compatibility problem are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of document management, and particularly to a method and system for converting encrypted drawing data. Background Art

[0002] In many fields such as engineering design, architectural planning, and mechanical manufacturing, CAD (Computer-Aided Design) drawings, as indispensable information carriers in the design and manufacturing processes, carry detailed design intentions and technical details. At the same time, with the rapid development of information technology, the way of reviewing construction drawings is undergoing a major transformation from traditional offline paper-based review to online electronic review. This transformation aims to improve the efficiency and accuracy of drawing review by using modern information technology means, so as to meet the requirements of fast-paced project development.

[0003] However, in the prior art, when reviewing CAD drawings by means of online review, it is usually necessary for reviewers to install corresponding CAD viewing software on the computer, which not only increases the preparation workload before review, but also may cause delays in the review process due to software compatibility issues. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for converting encrypted drawing data, aiming to solve the technical problem that when reviewing CAD drawings by means of online review in the prior art, it is usually necessary for reviewers to install corresponding CAD viewing software on the computer, which not only increases the preparation workload before review, but also may cause delays in the review process due to software compatibility issues.

[0005] To achieve the above object, a conversion system for encrypted drawing data of the present invention includes a drawing upload module, a drawing parsing module, a drawing recognition module, a drawing optimization module, a format conversion module, an encryption transmission unit, a storage module, a review module, and a client. The drawing upload module is connected to the client, the drawing parsing module is connected to the drawing upload module, the drawing recognition module is disposed between the drawing parsing module and the drawing optimization module, the format conversion module is connected to the drawing optimization module, the encryption transmission unit is connected to both the format conversion module and the storage module, the review module is connected to the storage module, the review module is further connected to the client, and the storage module is further connected to the drawing upload module;

[0006] The client is used for staff to log in to the entire system;

[0007] The staff uploads the CAD encrypted drawing through the drawing upload module;

[0008] The drawing parsing module decrypts the CAD encrypted drawing by using ODA technology;

[0009] The drawing recognition module is used to recognize the decrypted drawing, obtain the drawing content, and perform optimization processing on the recognized drawing through the drawing optimization module;

[0010] The format conversion module converts the optimized drawing into a specified format based on ODA technology;

[0011] The encrypted transmission unit is used to encrypt and transmit the converted drawing to the storage module for storage;

[0012] The review module is used for managers to review and download the drawing data in the storage module.

[0013] Among them, the encrypted transmission unit includes a transmission module, an encryption module, a decryption module, a key management module, and a key generation module. The transmission module is connected to both the format conversion module and the storage module. The encryption module is connected to the format conversion module. The decryption module is connected to the review module. The key management module is connected to both the encryption module and the decryption module. The key generation module is connected to the key management module;

[0014] The key management module is used to request the key generation module to generate an encryption key and a decryption key according to the transmission requirement, and distribute them to the encryption module and the decryption module;

[0015] The encryption module encrypts the PDF file generated by the format conversion module and then transmits it to the storage module through the transmission module for storage in the generated storage path;

[0016] When starting the review module to review the PDF file, the review module decrypts the ciphertext with the decryption key in the decryption module to obtain the original PDF file.

[0017] Among them, a compression module is also implanted in the storage module. When the drawing upload module uploads the CAD encrypted drawing, the storage module reads the file path of the CAD encrypted drawing uploaded by the drawing upload module, and generates a new folder named _PDF as the storage path of the PDF drawing file based on this path. The converted PDF drawing is stored in this storage path;

[0018] The compression module is used to compress the stored files, and provides a decompression function during review.

[0019] Among them, the conversion system for encrypted drawing data further includes a login module and a permission management module. The login module is connected to the client, and the permission management module is connected to the login module;

[0020] The login module is used for administrators to log in to the client;

[0021] The permission management module assigns corresponding system access permissions to users based on the accounts of the logged-in personnel (which may also include other authentication information such as passwords, roles, departments, etc.). (These permissions determine what operations users can perform, such as uploading drawings, viewing PDFs, managing keys, etc.)

[0022] Among them, the conversion system for encrypted drawing data further includes a verification module and an error reporting module. The verification module is connected to the login module, and the error reporting module is connected to the verification module.

[0023] Among them, the conversion system for encrypted drawing data further includes a reminder module. The reminder module is connected to the review module.

[0024] Among them, the conversion system for encrypted drawing data further includes a log recording module. The log recording module is connected to the review module.

[0025] The present invention also provides a method for converting encrypted drawing data, which is applied to the conversion system for encrypted drawing data as described above.

[0026] It includes the following steps:

[0027] First, the staff member logs in to the client and uploads the CAD encrypted drawing using the drawing upload module;

[0028] After that, the drawing parsing module decrypts the CAD encrypted drawing using ODA technology and performs identification through the drawing recognition module to obtain the drawing content;

[0029] Then, the recognized drawing is optimized by the drawing optimization module and transmitted to the format conversion module for conversion to a specified format;

[0030] Subsequently, the encrypted transmission unit is used to encrypt and transmit the converted drawing to the storage module for storage;

[0031] Finally, the review module is used for administrators to review and download the drawing data in the storage module.

[0032] A method and system for converting encrypted drawing data according to the present invention, in specific use, first, a staff member logs in to the client and uploads a CAD encrypted drawing using the drawing upload module. At this time, the storage module reads the file path of the CAD encrypted drawing uploaded by the drawing upload module, and generates a new folder named _PDF as the storage path of the PDF drawing file based on this path. The recognized drawing is optimized by the drawing optimization module and then transmitted to the format conversion module to be converted into a specified format. Subsequently, the encrypted transmission unit is used to encrypt and transmit the converted drawing to the storage path of the PDF drawing file in the storage module for storage; finally, the review module is used for managers to review and download the drawing data in the storage module. In this way, it solves the technical problem that when reviewing CAD drawings by means of online review in the prior art, it is usually necessary for reviewers to install corresponding CAD drawing viewing software on the computer, which not only increases the preparatory workload before review, but also may cause delays in the review process due to software compatibility issues.

[0033] By integrating steps such as drawing upload, parsing, recognition, optimization, format conversion, encrypted transmission, storage, and review, the present invention realizes the full automation of the online review of CAD drawings, without the need for reviewers to install additional CAD drawing viewing software on the computer in advance, significantly reducing the preparatory workload before review.

[0034] Using ODA technology to parse and convert the CAD drawing ensures the accurate recognition and conversion of the drawing content, while avoiding delays in the review process caused by software compatibility issues, and improving the overall efficiency of the review work.

[0035] By encrypting the converted drawing data through the encrypted transmission unit and securely storing it in the storage module, the present invention effectively guarantees the security of the drawing data during transmission and storage, preventing the risks of data leakage and illegal access.

[0036] The close connection between the review module and the client enables managers to access the drawing data in the storage module through the client at any time and place for review and download operations, greatly improving the convenience and flexibility of the review work. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a block diagram of the principle of the first embodiment of the present invention.

[0039] Figure 2 It is a block diagram of the principle of the second embodiment of the present invention.

[0040] Figure 3 It is a block diagram of the principle of the third embodiment of the present invention.

[0041] 101 - Drawing upload module, 102 - Drawing parsing module, 103 - Drawing recognition module, 104 - Drawing optimization module, 105 - Format conversion module, 106 - Encrypted transmission unit, 107 - Storage module, 108 - Review module, 109 - Client, 110 - Login module, 111 - Permission management module, 112 - Transmission module, 113 - Encryption module, 114 - Decryption module, 115 - Key management module, 116 - Key generation module, 117 - Compression module, 201 - Verification module, 202 - Error reporting module, 203 - Reminder module, 204 - Log recording module, 301 - Audit assistance module, 302 - Data backup module, 303 - Data recovery module. Detailed implementation manners

[0042] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation to the present invention.

[0043] The first embodiment of the present application is as follows:

[0044] Please refer to Figure 1 , Figure 1 It is a block diagram of the principle of the first embodiment of the present invention.

[0045] The present invention provides a conversion system for encrypting drawing data, including a drawing upload module 101, a drawing parsing module 102, a drawing recognition module 103, a drawing optimization module 104, a format conversion module 105, an encrypted transmission unit 106, a storage module 107, a review module 108, a client 109, a login module 110, and a permission management module 111. The encrypted transmission unit 106 includes a transmission module 112, an encryption module 113, a decryption module 114, a key management module 115, and a key generation module 116. The foregoing solution solves the technical problem that when the prior art uses an online review method to review CAD drawings, it usually requires reviewers to install corresponding CAD viewing software on the computer, which not only increases the preparatory workload before review but also may delay the review process due to software compatibility issues.

[0046] For this specific embodiment, the client 109 is used for staff to log in to the entire system;

[0047] The staff uploads the CAD encrypted drawings through the drawing upload module 101;

[0048] The drawing parsing module 102 decrypts the CAD encrypted drawings using ODA technology;

[0049] The drawing recognition module 103 is used to recognize the decrypted drawings, obtain the drawing content, and perform optimization processing on the recognized drawings through the drawing optimization module 104;

[0050] The format conversion module 105 converts the optimized drawings into a specified format based on ODA technology;

[0051] The encryption transmission unit 106 is used to encrypt and transmit the converted drawings to the storage module 107 for storage;

[0052] The review module 108 is used for managers to review and download the drawing data in the storage module 107.

[0053] Among them, the drawing upload module 101 is connected to the client 109, the drawing parsing module 102 is connected to the drawing upload module 101, the drawing recognition module 103 is arranged between the drawing parsing module 102 and the drawing optimization module 104, the format conversion module 105 is connected to the drawing optimization module 104, the encryption transmission unit 106 is connected to both the format conversion module 105 and the storage module 107, the review module 108 is connected to the storage module 107, the review module 108 is also connected to the client 109, and the storage module 107 is also connected to the drawing upload module 101. In specific use, first, the staff logs in to the client 109 and uses the drawing upload module 101 to upload the CAD encrypted drawing. At this time, the storage module 107 reads the file path of the CAD encrypted drawing uploaded by the drawing upload module 101, and generates a new folder named _PDF as the storage path of the PDF drawing file based on this path. The recognized drawing is optimized by the drawing optimization module 104 and then transmitted to the format conversion module 105 to be converted into a specified format. Subsequently, the encryption transmission unit 106 is used to encrypt and transmit the converted drawing to the storage path of the PDF drawing file in the storage module 107 for storage. Finally, the review module 108 is used for managers to review and download the drawing data in the storage module 107. In this way, it solves the technical problem that when reviewing CAD drawings by the online review method in the prior art, it is usually necessary for the reviewers to install the corresponding CAD viewing software on the computer, which not only increases the preparation workload before the review, but also may cause delays in the review process due to software compatibility issues.

[0054] Secondly, the transmission module 112 is connected to both the format conversion module 105 and the storage module 107, the encryption module 113 is connected to the format conversion module 105, the decryption module 114 is connected to the review module 108, the key management module 115 is connected to both the encryption module 113 and the decryption module 114, and the key generation module 116 is connected to the key management module 115;

[0055] The key management module 115 is used to request the key generation module 116 to generate an encryption key and a decryption key according to the transmission requirements, and distribute them to the encryption module 113 and the decryption module 114;

[0056] The encryption module 113 encrypts the PDF file generated by the format conversion module 105 and then transmits it to the storage module 107 through the transmission module 112 for storage in the generated storage path;

[0057] When starting the review module 108 to review a PDF file, the review module 108 decrypts the ciphertext with the decryption key in the decryption module 114 to obtain the original PDF file.

[0058] The specific methods include an encryption process and a decryption process:

[0059] Encryption algorithm process:

[0060] When the key management module 115 detects that a PDF file needs to be encrypted and transmitted, it sends a key generation request to the key generation module 116 according to a preset security policy (such as key length, encryption algorithm type, etc.).

[0061] After receiving the request, the key generation module 116 generates a pair of encryption keys and decryption keys according to the specified parameters. The generated key pair includes a public key (for encryption) and a private key (for decryption).

[0062] The key management module 115 receives and stores the generated encryption key (the public key can be made public or stored in a secure location for encryption use), and at the same time securely stores the decryption key (private key) and prepares to distribute it to the decryption module 114 that needs to decrypt.

[0063] After the format conversion module 105 completes the conversion of the drawing to the PDF format, it sends the generated PDF file to the encryption module 113.

[0064] The encryption module 113 obtains the encryption key (public key) corresponding to the currently encrypted PDF file from the key management module 115.

[0065] The encryption module 113 encrypts the PDF file using the obtained public key to generate an encrypted PDF ciphertext.

[0066] After encryption, the encryption module 113 sends the encrypted PDF ciphertext to the storage module 107 through the transmission module 112.

[0067] After receiving the encrypted PDF ciphertext, the transmission module 112 transmits the ciphertext to the storage module 107 according to a preset transmission protocol (such as HTTP, FTP, etc.) and storage path information for storage in the specified storage path, waiting for review.

[0068] The decryption algorithm process is as follows:

[0069] When it is necessary to review the stored encrypted PDF file, the user starts the review module 108 through the client 109. The review module 108 sends a file acquisition request to the storage module 107 according to the file or file identifier selected by the user.

[0070] After the storage module 107 receives a file acquisition request, it retrieves the encrypted PDF ciphertext from the storage location according to the file identifier or path information in the request, and sends it to the review module 108.

[0071] After the review module 108 receives the encrypted PDF ciphertext, it sends a decryption request to the decryption module 114. The request contains the encrypted PDF ciphertext and information for identifying the decryption key.

[0072] After the decryption module 114 receives the decryption request, it obtains the corresponding decryption key (private key) from the key management module 115 according to the key identifier information in the request.

[0073] The decryption module 114 uses the obtained private key to perform a decryption operation on the encrypted PDF ciphertext to restore the original PDF file. After decryption is completed, the decryption module 114 sends the decrypted original PDF file to the review module 108 for the user to view.

[0074] Meanwhile, a compression module 117 is also implanted in the storage module 107. When the drawing upload module 101 uploads a CAD encrypted drawing, the storage module 107 reads the file path of the CAD encrypted drawing uploaded by the drawing upload module 101, and generates a new folder named _PDF as the storage path for the PDF drawing file based on this path. The converted PDF drawing is stored in this storage path.

[0075] The compression module 117 is used to compress the stored files and provide a decompression function during review.

[0076] In addition, the conversion system for encrypted drawing data further includes a login module 110 and a permission management module 111. The login module 110 is connected to the client 109, and the permission management module 111 is connected to the login module 110.

[0077] The login module 110 is used for management personnel to log in to the client 109.

[0078] The permission management module 111 assigns corresponding system access permissions to users based on the accounts of the logged-in personnel (which may also include other authentication information such as passwords, roles, departments, etc.). (These permissions determine what operations users can perform, such as uploading drawings, viewing PDFs, managing keys, etc.)

[0079] When using a conversion system for encrypting drawing data in this embodiment, in specific use, first, the staff logs in to the client 109 and uploads the CAD encrypted drawing using the drawing upload module 101. At this time, the storage module 107 reads the file path of the CAD encrypted drawing uploaded by the drawing upload module 101, and generates a new folder named _PDF as the storage path for the PDF drawing file based on this path. The recognized drawing is optimized by the drawing optimization module 104 and then transmitted to the format conversion module 105 for conversion to a specified format. Subsequently, the encryption transmission unit 106 is used to encrypt and transmit the converted drawing to the storage path of the PDF drawing file in the storage module 107 for storage. Finally, the review module 108 is used for managers to review and download the drawing data in the storage module 107. In this way, it solves the technical problem that when reviewing CAD drawings by the online review method in the prior art, it usually requires reviewers to install corresponding CAD drawing viewing software on the computer, which not only increases the preparation workload before review, but also may cause delays in the review process due to software compatibility issues.

[0080] Through integrating steps such as drawing upload, parsing, recognition, optimization, format conversion, encrypted transmission, storage, and review, the present invention realizes the full automation of the online review of CAD drawings, without the need for reviewers to install additional CAD drawing viewing software on the computer in advance, significantly reducing the preparation workload before review.

[0081] Using ODA technology to parse and convert CAD drawings ensures the accurate recognition and conversion of drawing content, while avoiding delays in the review process caused by software compatibility issues, improving the overall efficiency of the review work.

[0082] By encrypting the converted drawing data through the encryption transmission unit 106 and securely storing it in the storage module 107, the present invention effectively guarantees the security of the drawing data during transmission and storage, preventing the risks of data leakage and illegal access.

[0083] The close connection between the review module 108 and the client 109 enables managers to access the drawing data in the storage module 107 through the client 109 at any time for review and download operations, greatly improving the convenience and flexibility of the review work.

[0084] The second embodiment of this application is as follows:

[0085] Based on the first embodiment, please refer to Figure 2 , Figure 2 which is the principle block diagram of the second embodiment of the present invention.

[0086] The present invention provides a conversion system for encrypted drawing data, further comprising a verification module 201, an error reporting module 202, a reminder module 203 and a log recording module 204.

[0087] For this specific embodiment, the verification module 201 is connected to the login module 110, and the error reporting module 202 is connected to the verification module 201. The addition of the verification module 201 ensures that only authenticated users can log in to the system and perform subsequent operations, effectively preventing access by unauthorized users and malicious operations, and enhancing the overall security of the system.

[0088] The error reporting module 202 can promptly detect illegal logins to the login module 110 and give an alarm.

[0089] Among them, the reminder module 203 is connected to the review module 108. The reminder module 203 can timely remind the management personnel to pay attention and handle when the review task is about to expire or the review progress lags behind, ensuring the smooth progress of the review work and the improvement of the review quality.

[0090] Secondly, the log recording module 204 is connected to the review module 108. The log recording module 204 can record in detail various operations, time nodes, results and other information during the review process, providing strong data support for problem tracking and analysis.

[0091] Using the conversion system for encrypted drawing data of this embodiment, the addition of the verification module 201 ensures that only authenticated users can log in to the system and perform subsequent operations, effectively preventing access by unauthorized users and malicious operations, and enhancing the overall security of the system. The reminder module 203 can timely remind the management personnel to pay attention and handle when the review task is about to expire or the review progress lags behind, ensuring the smooth progress of the review work and the improvement of the review quality. The log recording module 204 can record in detail various operations, time nodes, results and other information during the review process, providing strong data support for problem tracking and analysis.

[0092] The third embodiment of this application is:

[0093] Based on the second embodiment, please refer to Figure 3 , Figure 3 which is the principle block diagram of the third embodiment of the present invention.

[0094] The present invention provides a conversion system for encrypted drawing data, further comprising an audit assistance module 301, a data backup module 302 and a data recovery module 303.

[0095] For this specific embodiment, the audit assistance module 301 is connected to the review module 108. The addition of the audit assistance module 301 can use advanced algorithms and technologies to perform preliminary analysis and screening on the drawing data, assisting the reviewers to quickly locate key information and potential problems, thereby greatly improving the audit efficiency. At the same time, intelligent auditing can also reduce misjudgments and omissions caused by human factors and improve the accuracy of audit results.

[0096] Among them, the data backup module 302 is connected to the storage module 107, and the data recovery module 303 is connected to the data backup module 302. The data backup module 302 can regularly back up the drawing data in the storage module 107 to ensure that the data can be quickly restored through the data recovery module 303 in case of accidental loss or damage, effectively guaranteeing the integrity and availability of the data.

[0097] Using the conversion system for encrypted drawing data of this embodiment, the addition of the audit assistance module 301 can use advanced algorithms and technologies to perform preliminary analysis and screening on the drawing data, assisting the reviewers to quickly locate key information and potential problems, thereby greatly improving the audit efficiency. At the same time, intelligent auditing can also reduce misjudgments and omissions caused by human factors and improve the accuracy of audit results.

[0098] The present invention also provides a method for converting encrypted drawing data, which is applied to the conversion system for encrypted drawing data as described above.

[0099] It includes the following steps:

[0100] First, the staff logs in to the client 109 and uploads the CAD encrypted drawing using the drawing upload module 101.

[0101] After that, the drawing parsing module 102 decrypts the CAD encrypted drawing using the ODA technology and performs identification through the drawing recognition module 103 to obtain the drawing content.

[0102] Then, the recognized drawing is optimized by the drawing optimization module 104 and transmitted to the format conversion module 105 to be converted into a specified format.

[0103] Subsequently, the encryption transmission unit 106 is used to encrypt and transmit the converted drawing to the storage module 107 for storage.

[0104] Finally, the review module 108 is used for the management staff to review and download the drawing data in the storage module 107.

[0105] The specific method for optimizing the recognized drawing through the drawing optimization module 104 and transmitting it to the format conversion module 105 for conversion into a specified format:

[0106] The drawing optimization module 104 first receives the recognized drawing data transmitted by the drawing recognition module 103. In the preprocessing stage, the drawing optimization module 104 will conduct a preliminary inspection and cleaning of the drawing, removing redundant information, noise, and possible recognition errors to ensure the accuracy and efficiency of subsequent processing.

[0107] Subsequently, the drawing optimization module 104 will apply a series of optimization algorithms to process the drawing. These algorithms may include image enhancement (such as sharpening, denoising), line smoothing, graphic standardization (such as unifying line widths, font sizes), etc., aiming to improve the clarity and readability of the drawing while reducing the data volume and storage requirements.

[0108] After the optimization process is completed, the drawing optimization module 104 will conduct a quality inspection of the drawing to ensure that the optimized drawing meets the preset quality standards. This may include checking whether the lines are continuous, whether the text is clearly readable, whether the graphic scale is accurate, etc.

[0109] After the optimization process is completed, the format conversion module 105 converts the optimized drawing into PDF format based on ODA technology.

[0110] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A conversion system for encrypted drawing data, characterized in that: It includes a drawing upload module, a drawing parsing module, a drawing recognition module, a drawing optimization module, a format conversion module, an encryption transmission unit, a storage module, a review module and a client, wherein the drawing upload module is connected to the client, the drawing parsing module is connected to the drawing upload module, the drawing recognition module is arranged between the drawing parsing module and the drawing optimization module, the format conversion module is connected to the drawing optimization module, the encryption transmission unit is connected to the format conversion module and the storage module, the review module is connected to the storage module, the review module is also connected to the client, and the storage module is also connected to the drawing upload module; The client is used by staff to log in to the entire system; The staff uploads the CAD encrypted drawings through the drawing upload module; The drawing parsing module uses ODA technology to decrypt CAD encrypted drawings; The drawing recognition module is used to recognize the decrypted drawing, obtain the drawing content, and optimize the recognized drawing through the drawing optimization module; The format conversion module converts the optimized drawings into a specified format based on ODA technology; The encryption transmission unit is used to encrypt and transmit the converted drawings to the storage module for storage; The review module is used by management personnel to review and download the drawing data in the storage module.

2. The encrypted drawing data conversion system according to claim 1, characterized in that: The encrypted transmission unit includes a transmission module, an encryption module, a decryption module, a key management module and a key generation module, wherein the transmission module is connected to the format conversion module and the storage module, the encryption module is connected to the format conversion module, the decryption module is connected to the review module, the key management module is connected to the encryption module and the decryption module, and the key generation module is connected to the key management module; The key management module is used to request the key generation module to generate encryption keys and decryption keys according to transmission requirements, and distribute them to the encryption module and the decryption module; The encryption module encrypts the PDF file generated by the format conversion module and transmits it to the storage module through the transmission module and stores it in the generated storage path; When the review module is started to review the PDF file, the review module decrypts the ciphertext using the decryption key in the decryption module to obtain the original PDF file.

3. The encrypted drawing data conversion system according to claim 2, wherein: The storage module is also embedded with a compression module. When the drawing upload module uploads the CAD encrypted drawing, the storage module reads the CAD encrypted drawing file path uploaded by the drawing upload module, and generates a new folder named _PDF based on the path as the storage path of the PDF drawing file. The converted PDF drawing is stored in the storage path. The compression module is used to compress the stored files, and during review, the compression module provides a decompression function accordingly.

4. The encrypted drawing data conversion system according to claim 3, characterized in that: The encrypted drawing data conversion system further includes a login module and a rights management module, wherein the login module is connected to the client, and the rights management module is connected to the login module; The login module is used for the administrator to log in to the client; The authority management module allocates corresponding system access rights to users based on the account of the logged-in personnel.

5. The encrypted drawing data conversion system according to claim 4, characterized in that: The encrypted drawing data conversion system further includes a verification module and an error reporting module. The verification module is connected to the login module, and the error reporting module is connected to the verification module.

6. The encrypted drawing data conversion system according to claim 5, characterized in that: The encrypted drawing data conversion system further includes a reminder module, which is connected to the review module.

7. The encrypted drawing data conversion system according to claim 6, characterized in that: The encrypted drawing data conversion system further includes a log recording module, and the log recording module is connected to the review module.

8. A method for converting encrypted drawing data, applied to the encrypted drawing data conversion system as claimed in claim 7, characterized in that: The steps include: First, the staff logs in to the client and uses the drawing upload module to upload the CAD encrypted drawing; Afterwards, the drawing parsing module uses the ODA technology to decrypt the CAD encrypted drawing, and identifies it through the drawing identification module to obtain the drawing content; Then, the recognized drawings are optimized by the drawing optimization module and transmitted to the format conversion module to be converted into a specified format; Subsequently, the encryption transmission unit is used to encrypt and transmit the converted drawings to the storage module for storage; Finally, the review module is used by management personnel to review and download the drawing data in the storage module.

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