WO2024027301A1 - Procédé de chiffrement destiné à un logiciel de diagnostic d'automobile - Google Patents

Procédé de chiffrement destiné à un logiciel de diagnostic d'automobile Download PDF

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Publication number
WO2024027301A1
WO2024027301A1 PCT/CN2023/096607 CN2023096607W WO2024027301A1 WO 2024027301 A1 WO2024027301 A1 WO 2024027301A1 CN 2023096607 W CN2023096607 W CN 2023096607W WO 2024027301 A1 WO2024027301 A1 WO 2024027301A1
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WIPO (PCT)
Prior art keywords
file
diagnostic
encrypted
automobile
software
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Application number
PCT/CN2023/096607
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English (en)
Chinese (zh)
Inventor
蒋永鑫
章程
谢嘉丰
Original Assignee
深圳市星卡软件技术开发有限公司
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Publication of WO2024027301A1 publication Critical patent/WO2024027301A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/602—Providing cryptographic facilities or services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/12—Protecting executable software
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]

Definitions

  • the present disclosure relates to the technical field of automobile diagnosis, and in particular, to an encryption method for automobile diagnostic software.
  • the purpose of this disclosure is to provide an encryption method for automobile diagnostic software to alleviate the technical problem in the prior art that encrypted files in automobile diagnostic software are easy to crack.
  • embodiments of the present disclosure provide an encryption method for automobile diagnostic software, which is applied to a server.
  • the server is connected to an automobile diagnostic device.
  • the automobile diagnostic device is connected to a diagnostic connector. Storage is stored in the diagnostic connector.
  • There is a public key file; the methods described include:
  • the file content of the automobile diagnostic software is first encrypted to obtain an encrypted intermediate file, including:
  • the file order of the plurality of files to be encrypted is randomly arranged to obtain the encrypted intermediate file of the automobile diagnostic software.
  • the characteristic information of the diagnostic connector includes any one or more of the following:
  • the serial number of the diagnostic connector and the production time stamp of the diagnostic connector are identical to each other.
  • performing a second encryption on the target intermediate file and the private key file to obtain an encrypted encrypted file includes:
  • the target intermediate file and the private key file are secondly encrypted using the RSA encryption algorithm to obtain an encrypted encrypted file.
  • the format type of the file content includes any one or more of the following:
  • the diagnostic connector is connected to the car to be diagnosed, and the diagnostic connector is used to send the on-board data of the car to be diagnosed to the car diagnostic device; in the step of sending the encrypted file to the After the automotive diagnostic equipment mentioned above, it also includes:
  • the diagnostic connector decrypts the encrypted file through the public key file
  • the vehicle diagnostic device uses the target vehicle diagnostic software to diagnose the vehicle to be diagnosed based on the vehicle data.
  • inventions of the present disclosure provide an encryption system for automobile diagnostic software.
  • the system includes:
  • a server, an automobile diagnostic equipment and a diagnostic connector, the automobile diagnostic equipment is connected to the server and the diagnostic connector respectively;
  • the server is used to encrypt the file content in the automobile diagnostic software and send the encrypted encrypted file to the automobile diagnostic device;
  • the diagnostic connector is connected to the car to be diagnosed and is used to send the on-board data of the car to be diagnosed to the car diagnostic device;
  • a public key file is stored in the diagnostic connector
  • the automobile diagnostic equipment is used to download the encrypted file from the server, and use the public key file stored in the diagnostic connector to decrypt the encrypted file into the automobile diagnostic software;
  • the automobile diagnostic equipment is also used to run the automobile diagnostic software.
  • embodiments of the present disclosure provide an encryption device for automobile diagnostic software, which is applied to a server.
  • the server is connected to an automobile diagnostic equipment.
  • the automobile diagnostic equipment is connected to a diagnostic connector. Storage is stored in the diagnostic connector.
  • the first encryption module is used to first encrypt the file content of the automobile diagnostic software to obtain an encrypted intermediate file
  • a first determination module configured to determine a target intermediate file corresponding to the target automobile diagnostic software in response to the automobile diagnostic device's download request for the target automobile diagnostic software
  • An acquisition module configured to obtain the characteristic identifier of the diagnostic connector, and determine the public key file version stored in the diagnostic connector based on the characteristic identifier;
  • a second determination module configured to determine the private key file corresponding to the public key file based on the public key file version
  • a second encryption module configured to perform a second encryption on the target intermediate file and the private key file to obtain an encrypted encrypted file
  • a sending module configured to send the encrypted file to the automobile diagnostic device.
  • an embodiment of the present disclosure provides an electronic device, including a memory and a processor.
  • the memory stores a computer program that can run on the processor.
  • the processor executes the computer program, it implements The steps of the method described in the first aspect above.
  • embodiments of the present disclosure provide a computer-readable storage medium that stores computer-executable instructions.
  • the computer-executable instructions When the computer-executable instructions are called and run by a processor, the computer The executable instructions cause the processor to execute the steps of the method described in the first aspect above.
  • Embodiments of the present disclosure provide an encryption method for automobile diagnostic software.
  • the file content of the automobile diagnostic software is first encrypted to obtain an encrypted intermediate file.
  • Determine the target intermediate file corresponding to the target car diagnostic software then obtain the characteristic information of the diagnostic connector, and determine the public key file version stored in the diagnostic connector based on the characteristic information, thereby determining the private key file corresponding to the public key file based on the public key file version.
  • the key file is then encrypted for a second time on the intermediate file and the private key file to obtain the encrypted encrypted file, and the encrypted file is sent to the automobile diagnostic equipment.
  • the server first determines the file content of each car diagnostic software, performs the first encryption process on the file content of each car diagnostic software, and obtains the corresponding intermediate files, and then responds to the car diagnostic equipment's download of the target car diagnostic software. request, determine the corresponding target intermediate file, and then obtain the pre-stored public key file version in the diagnostic connector based on the characteristic information of the diagnostic connector, determine the private key file corresponding to the public key file, and then process the target intermediate file after the first heavy encryption.
  • the file and private key file are subjected to a second encryption process to obtain the final encrypted file, and the encrypted file is sent to the car diagnostic device.
  • the car diagnostic software file is not easy to be cracked, which alleviates the problem of car diagnostic software in the existing technology. It solves the technical problem that encrypted files are easy to crack, and puts the time-consuming encryption process into the compilation and packaging of diagnostic software, which can shorten the time consumed during use and improve encryption efficiency.
  • Figure 1 is a schematic flowchart of an encryption method for automobile diagnostic software provided by an embodiment of the present disclosure
  • Figure 2 is a schematic diagram of an encryption and decryption process of automobile diagnostic software provided by an embodiment of the present disclosure
  • Figure 3 is a schematic diagram of the principle of a first encryption algorithm provided by an embodiment of the present disclosure
  • Figure 4 is a schematic structural diagram of an encryption system for automobile diagnostic software provided by an embodiment of the present disclosure
  • Figure 5 is a schematic structural diagram of an encryption device for automobile diagnostic software provided by an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.
  • embodiments of the present disclosure provide an encryption method for automobile diagnostic software. This method can alleviate the technical problem in the prior art that encrypted files in automobile diagnostic software are easy to crack.
  • Figure 1 is a schematic flow chart of an encryption method for automobile diagnostic software provided by an embodiment of the present disclosure.
  • the method can be applied to a server.
  • the server is connected to the automobile diagnostic equipment.
  • the automobile diagnostic equipment is connected to the diagnostic connector.
  • the public key file is stored.
  • the method includes:
  • Step S110 Perform a first encryption on the file content of the automobile diagnostic software to obtain an encrypted intermediate file.
  • the car diagnostic software can go through the process of packaging, compilation, testing, and online for users to download and use on the server.
  • the first encryption process is placed in the packaging and compilation stage.
  • the server completes the first encryption of the file contents of each car diagnostic software, obtains the corresponding encrypted intermediate files, and stores the intermediate files on the server for users to download.
  • Step S120 In response to a download request from the automobile diagnostic device for the target automobile diagnostic software, determine the target intermediate file corresponding to the target automobile diagnostic software.
  • car maintenance personnel operate car diagnostic equipment to perform diagnostic analysis on the car to be diagnosed.
  • the maintenance personnel You can click the download button of the automobile diagnostic equipment to control the automobile diagnostic equipment to send a download request to the server.
  • the server can respond to the download request for the target automobile diagnostic software and determine the target intermediate file corresponding to the target automobile diagnostic software.
  • Step S130 Obtain the characteristic information of the diagnostic connector, and determine the public key file version stored in the diagnostic connector based on the characteristic information.
  • each diagnostic connector has a public key file pre-stored during production.
  • the server can identify the diagnostic connector by obtaining the characteristic information of the diagnostic connector, such as obtaining the unique serial number of the diagnostic connector.
  • the corresponding public key file version is a public key file version.
  • Step S140 Based on the public key file version, determine the private key file corresponding to the public key file.
  • the public key and private key of the server are a pair of keys.
  • the server saves the public key in the diagnostic connector, and the private key is still stored in the server.
  • the server can determine the corresponding private key file based on the public key file version stored in the diagnostic connector.
  • Step S150 Perform a second encryption on the target intermediate file and the private key file to obtain an encrypted encrypted file.
  • the server can put the target intermediate file corresponding to the target diagnostic software and the private key file together for the second encryption process to obtain an encrypted specific encrypted file (license file and encryption rule file). wait).
  • Step S160 Send the encrypted file to the automobile diagnostic device.
  • the server After the server generates a specific encrypted file, it sends the file to the automobile diagnostic device that requested the download, so that the maintenance personnel can use the automobile diagnostic device to diagnose the vehicle to be diagnosed through the software.
  • the client usually receives the encrypted information sent by the server, and then obtains the car diagnostic software data encrypted by the first algorithm and the first decryption key encrypted by the second algorithm according to the encrypted information, and then obtains the car diagnostic software data encrypted by the second algorithm according to the preset
  • the second algorithm decryption public key decrypts the first decryption key encrypted by the second algorithm to obtain the first algorithm decryption key
  • the first algorithm decryption key decrypts the car diagnostic software data encrypted by the first algorithm to obtain the car Diagnostic software.
  • the solution is to separately encrypt the vehicle diagnostic software data and the first decryption key, thereby realizing encryption of the data.
  • the server first performs encryption before the car diagnostic software is put online for download, and puts the time-consuming encryption process into the compilation and packaging of the diagnostic software. It first determines the file content of each car diagnostic software, and then The file content of the car diagnostic software is first encrypted to obtain the corresponding intermediate files, and then the response is Based on the download request of the target automobile diagnostic software from the automobile diagnostic equipment, the corresponding target intermediate file is determined, and then the pre-stored public key file version in the diagnostic connector is obtained according to the characteristic information of the diagnostic connector, and the private key file corresponding to the public key file is determined. Then, the target intermediate file and the private key file after the first encryption are processed together with the second encryption to obtain the final encrypted file, and the encrypted file is sent to the car diagnostic equipment.
  • the car diagnostic software file is not easily be cracked, which alleviates the technical problem that encrypted files in automobile diagnostic software are easy to crack in the existing technology, and puts the time-consuming encryption process into the compilation and packaging of diagnostic software, which can shorten the time consumed during use and improve encryption efficiency. .
  • the first encryption of the car diagnostic software file content can be flexibly implemented in a variety of ways.
  • the files can be shuffled and reorganized, so that the intermediate files corresponding to the diagnostic software are in an unordered and random state. , better achieve encryption effect.
  • the above step S110 may specifically include the following steps:
  • Step a) use the snowflake algorithm to randomly select multiple files to be encrypted from the file content.
  • the server can first obtain the format types of all files in the diagnostic software, and then randomly select any file from the format types of all files based on the snowflake algorithm, and then convert the selected files into As the files to be encrypted, a corresponding encrypted file list is generated, and the encrypted file list is used as a data file array, where the data of the files to be encrypted are all in binary format. Then obtain the total number of encrypted files n, based on the total number n, traverse all encrypted files, randomly arrange the file order of all files to be encrypted, and obtain the encrypted intermediate files. Among them, the method of traversing all encrypted files is shown in Figure 3.
  • the intermediate files of the diagnostic software can be made into an unordered and random state, which can increase the difficulty of being cracked.
  • the binary data in the intermediate files can be converted into hexadecimal data. Downloading can further protect the data of the intermediate file and ensure the security of the file as much as possible.
  • the characteristic information of the diagnostic connector may include multiple types, so that the server can verify the diagnostic connector in multiple ways and determine the public key and private key information more accurately.
  • the characteristic information of the diagnostic connector includes any one or more of the following:
  • the serial number of the diagnostic connector, and the production timestamp of the diagnostic connector are the serial number of the diagnostic connector, and the production timestamp of the diagnostic connector.
  • the server can determine the public key corresponding to the diagnostic connector and then determine the corresponding private key based on the serial number of the diagnostic connector and the timestamp at the time of production as query conditions.
  • the second encryption of the content of the diagnostic software file can be flexibly implemented in a variety of ways.
  • the target intermediate file and the private key file are secondly encrypted using the RSA encryption algorithm, so that the final encryption Files are more confidential and less likely to be cracked.
  • the above step S150 may specifically include the following steps:
  • the server can perform a second encryption process on the target intermediate file and the private key file using the RSA encryption algorithm to obtain the license file and encryption rule file (encrypted file).
  • the encrypted file corresponds to the device serial number of the automotive diagnostic device and/or diagnostic connector, so only the corresponding device connector can be decrypted.
  • the target intermediate file and the private key file are secondly encrypted using the RSA encryption algorithm to obtain the encrypted encrypted file, thereby realizing the second encryption of the content of the diagnostic software file, making the software file more difficult to crack and improving security.
  • the file contents of multiple formats in the automobile diagnostic software can be encrypted, thereby making the application scenarios more extensive and improving the encryption effect of the automobile diagnostic software.
  • the format type of the file content includes any one or more of the following:
  • the file content of multiple formats in the automotive diagnostic software can be encrypted, thereby making the application scenarios more extensive and improving the encryption effect of the automotive diagnostic software.
  • the encrypted file can be decrypted using the public key in the diagnostic connector, and only when the decryption is successful can the vehicle diagnostic software be run, ensuring data security.
  • the diagnostic connector is connected to the car to be diagnosed, and the diagnostic connector is used to send vehicle-mounted data of the car to be diagnosed to the car diagnostic device; after the above step S160, the method may also include the following steps:
  • Step d) the diagnostic connector decrypts the encrypted file through the public key file
  • Step e) if the decryption is successful, the car diagnostic equipment uses the target car diagnostic software to diagnose the car to be diagnosed based on the vehicle data.
  • the diagnostic connector can decrypt the license file based on the RSA algorithm and the built-in public key. If the decryption is successful, the car diagnostic equipment runs the diagnostic software and starts diagnosis based on the vehicle data transmitted by the diagnostic connector; If decryption is unsuccessful, the diagnostic software rejects the diagnosis and exits.
  • the diagnostic connector When performing car diagnosis, the diagnostic connector needs to use the pre-stored public key to decrypt the license file every time. Any modification in the license file will cause the diagnostic software to fail to decrypt, which can further protect the diagnosis.
  • the security of the files in the software is broken, preventing the software from being cracked and ensuring data security.
  • FIG. 4 is a schematic structural diagram of an encryption system for automobile diagnostic software provided by an embodiment of the present disclosure. As shown in Figure 4, the system includes a server, automotive diagnostic equipment and diagnostic connectors.
  • the automobile diagnostic equipment and the server can be connected through a wireless network, and the automobile diagnostic equipment and the diagnostic connector can be connected through a wireless or wired method.
  • the server is used to encrypt the file contents in the automotive diagnostic software.
  • the file contents in the diagnostic software are encrypted in the packaging and compilation stage to obtain the corresponding intermediate file.
  • the second stage is performed in the automotive diagnostic equipment request download stage. Encryption processing is performed to obtain the final encrypted file, and the encrypted file is sent to the automotive diagnostic equipment.
  • the diagnostic connector is plugged into the car to be diagnosed and used to send on-board data of the car to be diagnosed to the car diagnostic equipment.
  • a public key file is stored in the diagnostic connector.
  • the public key must be obtained from the encryption server.
  • the public key and private key of the encryption server are a pair of keys.
  • the public key is stored in the diagnostic connector.
  • the private key is still stored in the encryption server.
  • the car diagnostic equipment is used to download the encrypted file from the server, and use the public key file stored in the diagnostic connector to decrypt the encrypted file into car diagnostic software and run the car diagnostic software, so that the car diagnostic software can diagnose the car to be diagnosed based on the on-board data.
  • FIG. 5 is a schematic structural diagram of an encryption device for automobile diagnostic software provided by an embodiment of the present disclosure.
  • the encryption device 500 of automobile diagnostic software includes:
  • the first encryption module 501 is used to first encrypt the file content of the automobile diagnostic software to obtain an encrypted intermediate file.
  • the first determination module 502 is used to perform a first encryption on the file content to obtain an encrypted intermediate file of the target automobile diagnostic software.
  • the acquisition module 503 is configured to determine the target intermediate file corresponding to the target automobile diagnostic software in response to the automobile diagnostic device's download request for the target automobile diagnostic software.
  • the second determination module 504 is used to determine the private key file corresponding to the public key file based on the public key file version.
  • the second encryption module 505 is used to perform a second encryption on the target intermediate file and the private key file to obtain an encrypted encrypted file.
  • the sending module 506 is used to send the encrypted file to the automobile diagnostic device.
  • the first encryption module 501 is specifically used to:
  • the characteristic information of the diagnostic connector includes any one or more of the following:
  • the serial number of the diagnostic connector, and the production timestamp of the diagnostic connector are the serial number of the diagnostic connector, and the production timestamp of the diagnostic connector.
  • the second encryption module 505 is specifically used to:
  • the target intermediate file and the private key file are secondly encrypted using the RSA encryption algorithm to obtain the encrypted encrypted file.
  • the format type of the file content includes any one or more of the following:
  • the diagnostic connector is connected to the car to be diagnosed, and the diagnostic connector is used to send on-board data of the car to be diagnosed to the car diagnostic equipment; the device further includes:
  • the decryption module is used to send the encrypted file to the automotive diagnostic device, and the diagnostic connector decrypts the encrypted file through the public key file;
  • the car diagnostic equipment uses the target car diagnostic software to diagnose the car to be diagnosed based on the on-board data.
  • An embodiment of the present disclosure provides an electronic device.
  • the electronic device includes a processor and a storage device; a computer program is stored on the storage device, and the computer program executes any of the methods of the above embodiments when run by the processor. .
  • FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.
  • the electronic device includes: a processor 601, a memory 602, a bus 603 and a communication interface 604.
  • the processor 601, the communication interface 604 and the memory 602 are connected through the bus 603. ;
  • the processor 601 is used to execute executable modules stored in the memory 602, such as computer programs.
  • the memory 602 may include high-speed random access memory (RAM, Random Access Memory), and may also include non-volatile memory (Non-volatile Memory), such as at least one disk memory.
  • RAM random access memory
  • Non-volatile Memory non-volatile Memory
  • the communication connection between the system network element and at least one other network element is realized through at least one communication interface 604 (which can be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used.
  • the bus 603 may be an ISA bus, a PCI bus, an EISA bus, etc.
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one bidirectional arrow is used in Figure 6, but it does not mean that there is only one bus or one type of bus.
  • the memory 602 is used to store the program, and the processor 601 executes the program after receiving the execution instruction.
  • the method executed by the device for stream process definition disclosed in any of the embodiments of the present disclosure can be applied to the processor 601, Or implemented by processor 601.
  • the processor 601 may be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 601 .
  • the above-mentioned processor 601 can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it can also be a digital signal processor (Digital Signal Processing, DSP for short), Application Specific Integrated Circuit (ASIC for short), Field-Programmable Gate Array (FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.
  • CPU Central Processing Unit
  • NP Network Processor
  • DSP Digital Signal Processing
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory 602.
  • the processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.
  • the computer program product of the readable storage medium provided by the embodiment of the present disclosure includes a computer-readable storage medium storing program code.
  • the instructions included in the program code can be used to execute the method in the previous method embodiment.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code. .

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Abstract

La présente invention se rapporte au domaine technique du diagnostic d'automobile, et concerne un procédé de chiffrement destiné à un logiciel de diagnostic d'automobile, destiné à être utilisé pour résoudre le problème technique de l'état de la technique selon lequel des fichiers chiffrés dans un logiciel de diagnostic d'automobile sont facilement piratés. Le procédé consiste : à effectuer un premier chiffrement sur un contenu de fichier d'un logiciel de diagnostic d'automobile afin d'obtenir des fichiers intermédiaires chiffrés ; en réponse à une demande de téléchargement d'un dispositif de diagnostic d'automobile pour un logiciel de diagnostic d'automobile cible, à déterminer un fichier intermédiaire cible correspondant au logiciel de diagnostic d'automobile cible ; à acquérir des informations de caractéristique d'un connecteur de diagnostic, et en fonction des informations de caractéristique, à déterminer une version de fichier de clé publique stockée dans le connecteur de diagnostic ; en fonction de la version de fichier de clé publique, à déterminer un fichier de clé privée correspondant à un fichier de clé publique ; à effectuer un second chiffrement sur le fichier intermédiaire et le fichier de clé privée afin d'obtenir un fichier chiffré ; et à envoyer le fichier chiffré au dispositif de diagnostic d'automobile.
PCT/CN2023/096607 2022-08-05 2023-05-26 Procédé de chiffrement destiné à un logiciel de diagnostic d'automobile WO2024027301A1 (fr)

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