CN114640474A - Safety authentication and encryption method for automobile separated type cabin - Google Patents
Safety authentication and encryption method for automobile separated type cabin Download PDFInfo
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- CN114640474A CN114640474A CN202210541308.1A CN202210541308A CN114640474A CN 114640474 A CN114640474 A CN 114640474A CN 202210541308 A CN202210541308 A CN 202210541308A CN 114640474 A CN114640474 A CN 114640474A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
- H04L63/205—Network architectures or network communication protocols for network security for managing network security; network security policies in general involving negotiation or determination of the one or more network security mechanisms to be used, e.g. by negotiation between the client and the server or between peers or by selection according to the capabilities of the entities involved
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- 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
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/84—Vehicles
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Abstract
The invention discloses a safety certification and encryption method for a separated type cabin of an automobile, wherein the separated type cabin comprises a daughter board and a mother board, the daughter board and the mother board are connected through an SPI (serial peripheral interface), an LVDS (low voltage differential signaling) interface and a UART (universal asynchronous receiver/transmitter) interface, the daughter board and the mother board are respectively connected with a safety chip which is provided with an independent storage space and supports a plurality of encryption and decryption algorithms and interfaces of editable code spaces and customizable algorithms through the SPI, and the specific method comprises the following steps: when the vehicle machine is powered on, the mother board uses the SPI interface to communicate with the daughter board, the transmission of the data of the rest interfaces is in a forbidden state, the mother board authenticates the daughter board, and when the daughter board passes the authentication of the mother board, the data and the communication of the rest interfaces enter a normal working mode; after the mother board and the daughter board enter a normal working mode, data of SPI interfaces of the two parties are encrypted through an encryption mechanism and then transmitted, and the safety of data transmission can be guaranteed. The method of the invention is convenient for upgrading the daughter board.
Description
Technical Field
The invention relates to the technical field of intelligent automobile separated cabins, in particular to a safety certification and encryption method for an automobile separated cabin.
Background
With the continuous maturity and development of intelligent automobiles, the scheme of the separated type cabin is gradually popularized. The host factory usually designs the cabin host as two parts, a mother board and a daughter board. The motherboard mainly processes the traditional vehicle-mounted service and comprises WiFi, Radio, Bluetooth and other modules and physical interfaces for communicating with each ECU.
And the daughter board processes emerging services and applications related to the intelligent automobile, such as display, voice interaction, automatic driving and the like. Different from the traditional master set service mode, the service has high calculation force requirement on the system and high iteration updating speed, so that the hardware product of the intelligent cockpit is upgraded only once in about two years, and the requirement of the vehicle on automatic driving can be met. Through the scheme of the separated type cabin, a host factory or a vehicle owner can deal with the development of different emerging services by only upgrading the daughter board. Meanwhile, the scheme also reduces the development cost of the host factory on multi-platform hardware.
However, the vehicle is different from other consumer products, and in order to ensure the safety of the vehicle, the active replacement of the upgraded daughter board needs to be authenticated and authorized by a host factory or a professional third-party organization, so as to ensure the hardware reliability of the daughter board and the safety of data.
Based on the background, an authentication and encryption scheme is required to be designed, so that the daughter board and the mother board of the intelligent cabin are ensured to be detected when the car machine is started, and the daughter board is ensured to be reliable hardware passing authentication and authorization; meanwhile, the daughter board and the mother board encrypt user information and core data in the communication process.
Disclosure of Invention
In order to solve the above problems, the present invention provides a security authentication method for a car split type cabin, which can detect a daughter board and ensure the security of data transmission.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention relates to a safety certification and encryption method for a separated cabin of an automobile, wherein the separated cabin comprises a daughter board and a mother board, the daughter board and the mother board are connected through an SPI (Serial peripheral interface), an LVDS (Low Voltage differential Signaling) interface and a UART (Universal asynchronous receiver transmitter) interface, the daughter board and the mother board are respectively connected with a safety chip which is provided with an independent storage space and an interface supporting a plurality of encryption and decryption algorithms of DES (data encryption standard)/3 DES (data encryption standard)/AES (advanced encryption standard)/RSA (rivest-Shamir-Adleman), an editable code space and a customizable algorithm through the SPI, and the specific method comprises the following steps:
step 1, after the car machine is powered on, the mother board uses the SPI interface to communicate with the daughter board, the transmission of the data of the rest interfaces is in a forbidden state, the mother board authenticates the daughter board, and after the daughter board passes the authentication of the mother board, the data and the communication of the rest interfaces enter a normal working mode;
and 2, after the mother board and the daughter board enter a normal working mode, data of the SPI interfaces of the two parties are encrypted through an encryption mechanism and then data transmission is carried out.
The authentication in the step 1 specifically comprises:
step 1.1, the daughter board is electrified to actively initiate a registration process, and information or parameters of the daughter board are sent to the mother board through the SPI;
step 1.2, after the mother board receives the registration information, the mother board generates a random number and randomly selects an encryption algorithm mark;
step 1.3, the mother board sends the random number and the encryption algorithm mark to the daughter board in a plaintext mode, and simultaneously sends the random number and the encryption algorithm mark to the security chip on the mother board;
step 1.4, the security chip on the motherboard selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and sends the ciphertext to the motherboard;
step 1.5, after receiving the random number and the encryption algorithm mark sent by the mother board, the daughter board synchronously sends the information to a security chip of the daughter board;
step 1.6, the security chip on the daughter board selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and sends the ciphertext to the daughter board;
step 1.7, after the daughter board obtains the ciphertext, the ciphertext is sent to the mother board through the SPI interface;
and step 1.8, the mother board acquires a ciphertext sent by the daughter board, compares the ciphertext with a ciphertext returned by a self security chip, passes authentication when the comparison is consistent, opens other transmission interfaces to enter a normal working state, enters a security working mode when the comparison result is inconsistent, and generates an alarm of authentication failure when the transmission of the data of the other interfaces is in a forbidden state.
The specific operation of sending data from the daughter board to the mother board in the step 2 is as follows:
step 2.1, before the service on the daughter board sends data to the mother board, sending a plaintext to a security chip of the daughter board, and designating an encryption algorithm to be set in an algorithm flag field in a plaintext protocol field;
2.2, the security chip of the daughter board selects a corresponding encryption algorithm according to the encryption mark, encrypts the plaintext into a ciphertext and returns the ciphertext to the daughter board;
step 2.3, the daughter board packages and sends the ciphertext to the mother board according to the SPI communication format;
step 2.4, the mother board analyzes the received message into a ciphertext and an encryption mark according to the communication format, and the ciphertext and the mark are sent to a security chip of the mother board;
and 2.5, the motherboard security chip selects a corresponding decryption algorithm based on the encryption mark, decrypts the ciphertext into a plaintext and returns the plaintext to the motherboard.
The motherboard and the daughter board are communicated by adopting a hardware SPI interface, the communication message format can be defined by adopting a fixed format as follows, and a security domain comprises two parts:
wherein, CryptoFlag indicates whether the data segment needs to be encrypted or decrypted;
wherein the CryptoType indicates that the data segment is an algorithm Type for encryption or decryption;
MsgLen: the length of the message;
group ID is message Group ID;
msg ID: when the message field exceeds 1024, unpacking the message, wherein the Msg ID indicates the sequence ID of the unpacked message;
data [0] -Data [ msgLen-1 ]: an active message.
The invention has the beneficial effects that: 1. the method can ensure the reliability of the daughter board hardware of the separated cabin of the automobile and the safety of the core communication data;
by the method, a host factory or a vehicle factory can ensure the source of the updated daughter board, the safety and reliability of the whole vehicle are ensured, and the complete ecology of the intelligent vehicle host is promoted.
Drawings
Figure 1 is a schematic diagram of the basic hardware architecture of a split cockpit.
Fig. 2 is a schematic diagram of a daughter board authentication flow.
Fig. 3 is a schematic diagram of encryption.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Referring to fig. 1 and 2, the invention is a security authentication and encryption method for a separated type cabin of an automobile, wherein the separated type cabin of the automobile comprises a mother board and a daughter board, the mother board and the daughter board perform data transmission through interfaces such as an SPI interface, an LVDS interface, a UART interface and the like, and core control data is transmitted through the SPI interface. And the MCU of the motherboard and the Soc of the daughter board are connected with a safety chip through SPI interfaces. The security chip itself comprises: the independent storage space can burn the key once, can support multiple encryption algorithms such as standard encryption and decryption algorithm 3DES/DES, and has an interface supporting editable code space and customizable algorithm. When a car factory leaves a mother board, a safety chip of the mother board can be used for burning a private key at one time, the private key is bound by unique information of a vehicle, such as a vehicle rack number, and the private key is generated by an algorithm which is not disclosed by the car factory; and the corresponding relation between the vehicle and the private key is maintained by the vehicle manufacturer. Meanwhile, the same private key is burnt in the security chip of the daughter board corresponding to the vehicle.
When a user or a host factory needs to update the daughter board, the application needs to be submitted to a vehicle factory or a professional third party, and after the vehicle factory confirms the daughter board and the vehicle information and confirms that the daughter board passes the relevant standard authentication, the corresponding burning file is provided for the host factory or the user to update the private key of the mother board on the corresponding vehicle in the security chip on the daughter board. Thus, the updated daughter board, the mother board and the vehicle are ensured to have unique corresponding relation.
The method comprises the following specific steps: authentication mechanisms and encryption mechanisms.
The authentication mechanism is as follows: after the car machine is powered on, the mother board can only use the SPI interface to communicate with the daughter board, the transmission of data of other interfaces is in a forbidden state, and only after the daughter board passes through the authentication of the mother board, the data and the communication of the other interfaces can enter a normal working mode. The specific process is as follows:
1, a daughter board is electrified to actively initiate a registration process, and information or parameters of the daughter board are sent to a mother board through an SPI (serial peripheral interface);
2, after receiving the registration information, the motherboard initiatively initiates an authentication process, the motherboard generates a random number, and randomly selects an encryption algorithm mark; the algorithm corresponding to the algorithm mark is encrypted by the security chip and corresponding encryption and decryption operations are executed;
3, the mother board sends the random number and the encryption algorithm mark to the daughter board in a plaintext mode, and simultaneously sends the random number and the encryption algorithm mark to the security chip on the mother board;
4, the security chip on the motherboard selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and sends the ciphertext to the motherboard;
5, after receiving the random number and the encryption algorithm mark sent by the mother board, the daughter board synchronously sends the information to a security chip of the daughter board;
6, the safety chip on the daughter board selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and then sends the ciphertext to the daughter board;
7, after the daughter board obtains the ciphertext, the ciphertext is sent to the mother board through the SPI interface;
and 8, the mother board acquires the ciphertext sent by the daughter board and compares the ciphertext with the ciphertext returned by the safety chip of the mother board, when the comparison is consistent, the daughter board passes authentication, opens other transmission interfaces to enter a normal working state, when the comparison result is inconsistent, the mother board enters a safety working mode, the transmission of the data of the other interfaces is in a forbidden state, and an alarm of authentication failure is generated.
Referring to fig. 3, the encryption operation when the daughter board sends data to the motherboard is specifically:
1, before the service on the daughter board sends data to the mother board, sending the plaintext to the security chip of the daughter board, and assigning the encryption algorithm to be set in the algorithm flag field in the plaintext protocol field
2, the safety chip of the daughter board selects a corresponding encryption algorithm according to the encryption mark, encrypts the plaintext into a ciphertext and returns the ciphertext to the daughter board;
3, the daughter board packages the ciphertext to the mother board according to the SPI communication format;
4, the mother board analyzes the received message according to the communication format to obtain a ciphertext and an encryption mark, and the ciphertext and the mark are sent to a security chip of the mother board;
and 5, the motherboard security chip selects a corresponding decryption algorithm based on the encryption mark, decrypts the ciphertext into a plaintext and returns the plaintext to the motherboard.
The encryption operation when the motherboard sends data to the daughter board specifically comprises the following steps:
1, before a service on a mother board sends data to a daughter board, sending a plaintext to a security chip of the mother board, and assigning an encryption algorithm to be set in an algorithm mark domain in a plaintext protocol field;
2, the security chip of the motherboard selects a corresponding encryption algorithm according to the encryption mark, encrypts the plaintext into a ciphertext and returns the ciphertext to the motherboard;
3, the mother board packages the ciphertext to the daughter board according to the SPI communication format;
4, the daughter board analyzes the received message according to the communication format to obtain a ciphertext and an encryption mark, and the ciphertext and the mark are sent to a security chip of the daughter board;
and 5, the daughter board security chip selects a corresponding decryption algorithm based on the encryption mark, decrypts the ciphertext into a plaintext and returns the plaintext to the daughter board.
The authentication mechanism of the invention can ensure the hardware reliability of the daughter board of the separated cabin of the automobile, and the encryption mechanism can ensure the security of the core data transmission. The method of the invention is convenient for the host factory or the owner to upgrade the daughter board, so that the daughter board can be developed to deal with different new businesses, and the safety and reliability of the upgrade of the daughter board can be ensured.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (3)
1. The safety certification and encryption method for the separated type cabin of the automobile comprises a daughter board and a mother board, wherein the daughter board and the mother board are connected through an SPI (serial peripheral interface), an LVDS (Low Voltage differential Signaling) interface and a UART (Universal asynchronous receiver transmitter) interface, and is characterized in that: the daughter board and the motherboard are respectively connected with a security chip which is provided with an independent storage space and an interface supporting DES/3DES/AES/RSA multiple encryption and decryption algorithms and editable code space and customizable algorithms through an SPI interface, and the specific method comprises the following steps:
step 1, after the car machine is powered on, the mother board uses the SPI interface to communicate with the daughter board, the transmission of the data of the rest interfaces is in a forbidden state, the mother board authenticates the daughter board, and after the daughter board passes the authentication of the mother board, the data and the communication of the rest interfaces enter a normal working mode;
and 2, after the mother board and the daughter board enter a normal working mode, data of the SPI interfaces of the two parties are encrypted through an encryption mechanism and then data transmission is carried out.
2. The security authentication and encryption method for the car separated type cabin according to claim 1, wherein: the authentication in the step 1 specifically comprises:
step 1.1, the daughter board is electrified to actively initiate a registration process, and information or parameters of the daughter board are sent to the mother board through the SPI;
step 1.2, after the mother board receives the registration information, the mother board generates a random number and randomly selects an encryption algorithm mark;
step 1.3, the mother board sends the random number and the encryption algorithm mark to the daughter board in a plaintext mode, and simultaneously sends the random number and the encryption algorithm mark to the security chip on the mother board;
step 1.4, the security chip on the motherboard selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and sends the ciphertext to the motherboard;
step 1.5, after receiving the random number and the encryption algorithm mark sent by the mother board, the daughter board synchronously sends the information to a security chip of the daughter board;
step 1.6, the security chip on the daughter board selects a corresponding encryption algorithm by analyzing the algorithm mark in the plaintext protocol field, encrypts the random number to obtain a corresponding ciphertext, and sends the ciphertext to the daughter board;
step 1.7, after the daughter board obtains the ciphertext, the ciphertext is sent to the mother board through the SPI interface;
and step 1.8, the mother board acquires a ciphertext sent by the daughter board, compares the ciphertext with a ciphertext returned by a self security chip, passes authentication when the comparison is consistent, opens other transmission interfaces to enter a normal working state, enters a security working mode when the comparison result is inconsistent, and generates an alarm of authentication failure when the transmission of the data of the other interfaces is in a forbidden state.
3. The security authentication and encryption method for the car separated type cabin according to claim 1, wherein: the specific operation of sending data from the daughter board to the mother board in the step 2 is as follows:
step 2.1, before the service on the daughter board sends data to the mother board, sending a plaintext to a security chip of the daughter board, and designating an encryption algorithm to be set in an algorithm flag field in a plaintext protocol field;
2.2, the security chip of the daughter board selects a corresponding encryption algorithm according to the encryption mark, encrypts the plaintext into a ciphertext and returns the ciphertext to the daughter board;
step 2.3, the daughter board packages and sends the ciphertext to the mother board according to the SPI communication format;
step 2.4, the mother board analyzes the received message into a ciphertext and an encryption mark according to the communication format, and the ciphertext and the mark are sent to a security chip of the mother board;
and 2.5, the motherboard security chip selects a corresponding decryption algorithm based on the encryption mark, decrypts the ciphertext into a plaintext and returns the plaintext to the motherboard.
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| CN202210541308.1A CN114640474A (en) | 2022-05-19 | 2022-05-19 | Safety authentication and encryption method for automobile separated type cabin |
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| CN202210541308.1A CN114640474A (en) | 2022-05-19 | 2022-05-19 | Safety authentication and encryption method for automobile separated type cabin |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106330455A (en) * | 2016-08-18 | 2017-01-11 | 北京华大信安科技有限公司 | Security authentication method, master electronic device and slave electronic device |
| CN112152963A (en) * | 2019-06-26 | 2020-12-29 | 国民技术股份有限公司 | Intelligent lock, security platform and authentication method thereof |
| WO2021174536A1 (en) * | 2020-03-06 | 2021-09-10 | 华为技术有限公司 | Communication method and related apparatus |
| CN114327041A (en) * | 2021-11-26 | 2022-04-12 | 北京百度网讯科技有限公司 | Multi-mode interaction method and system for intelligent cabin and intelligent cabin with multi-mode interaction method and system |
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- 2022-05-19 CN CN202210541308.1A patent/CN114640474A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330455A (en) * | 2016-08-18 | 2017-01-11 | 北京华大信安科技有限公司 | Security authentication method, master electronic device and slave electronic device |
| CN112152963A (en) * | 2019-06-26 | 2020-12-29 | 国民技术股份有限公司 | Intelligent lock, security platform and authentication method thereof |
| WO2021174536A1 (en) * | 2020-03-06 | 2021-09-10 | 华为技术有限公司 | Communication method and related apparatus |
| CN114327041A (en) * | 2021-11-26 | 2022-04-12 | 北京百度网讯科技有限公司 | Multi-mode interaction method and system for intelligent cabin and intelligent cabin with multi-mode interaction method and system |
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Application publication date: 20220617 |