CN115190578B - Information updating method and device in vehicle-mounted communication - Google Patents
Information updating method and device in vehicle-mounted communication Download PDFInfo
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- CN115190578B CN115190578B CN202210849494.5A CN202210849494A CN115190578B CN 115190578 B CN115190578 B CN 115190578B CN 202210849494 A CN202210849494 A CN 202210849494A CN 115190578 B CN115190578 B CN 115190578B
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- 230000002159 abnormal effect Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000005059 dormancy Effects 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
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Abstract
The embodiment of the application provides a method and a device for updating information in vehicle-mounted communication, wherein the method comprises the following steps: receiving first message information sent by a sending device under the condition that the receiving device is in a power-on state; and under the condition that the first message information meets the verification condition, updating the first numerical value corresponding to the receiving counter into a first target numerical value according to the difference value of the first numerical value and the first numerical value corresponding to the receiving counter, wherein the first numerical value is the fresh value in the first message information, and the first numerical value is the fresh value of the last message information received by the receiving device. Since there is a certain relation between the difference between the first fresh value and the first value and whether the fresh value is replayed or not, the receiving device updates the value of the receiving counter according to the difference between the first fresh value and the first value, and the vehicle-mounted communication synchronization between the transmitting device and the receiving device can be ensured regardless of whether the transmitting device replays the fresh value or not.
Description
Technical Field
The present application relates to the field of information security technologies, and in particular, to a method and an apparatus for updating information in vehicle-mounted communications.
Background
Protection of vehicle-mounted communication is indispensable for functional safety and information safety of vehicles. In a secure on-vehicle communication message transmission and reception mechanism employing a counter mode, data is securely managed by using a symmetric key and a freshness value. However, the sending end and the receiving end may have a replay condition of the fresh value because of different time after the whole vehicle is powered on or wakes up in a dormant state, which may cause that the vehicle-mounted communication cannot be synchronized.
Disclosure of Invention
The embodiment of the application provides a method and a device for updating information in vehicle-mounted communication, which can solve the problem that vehicle-mounted communication cannot be synchronized due to fresh value replay.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for updating information in vehicle-mounted communications, which is applied to a receiving device, and includes:
receiving first message information sent by a sending device under the condition that the receiving device is in a power-on state;
and under the condition that the first message information meets the verification condition, updating the first numerical value corresponding to the receiving counter into a first target numerical value according to the difference value of the first numerical value and the first numerical value corresponding to the receiving counter, wherein the first numerical value is the fresh value in the first message information, and the first numerical value is the fresh value of the last message information received by the receiving device.
In a second aspect, an embodiment of the present application provides an information updating apparatus in vehicle-mounted communication, including:
the receiving module is used for receiving the first message information sent by the sending device under the condition that the receiving device is in a power-on state;
and the updating module is used for updating the first numerical value corresponding to the receiving counter into a first target numerical value according to the difference value of the first numerical value corresponding to the receiving counter when the first message information meets the checking condition, wherein the first numerical value is the fresh value in the first message information, and the first numerical value is the fresh value of the last message information received by the receiving device.
In the technical scheme provided by the embodiment of the application, the first message information sent by the sending device is received under the condition that the receiving device is in the power-on state, and the first value corresponding to the receiving counter is updated to the first target value according to the difference value of the first value and the first value corresponding to the receiving counter under the condition that the first message information meets the verification condition, wherein the first value is the fresh value in the first message information, and the first value is the fresh value of the last message information received by the receiving device. Since there is a certain relation between the difference between the first fresh value and the first value and whether the fresh value is replayed or not, the receiving device updates the value of the receiving counter according to the difference between the first fresh value and the first value, and the vehicle-mounted communication synchronization between the transmitting device and the receiving device can be ensured regardless of whether the transmitting device replays the fresh value or not.
Drawings
FIG. 1 is a working flow chart of an information updating method in vehicle-mounted communication according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an information updating device in vehicle-mounted communication according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.
Under the high-speed development of intelligent network-connected automobiles, the functions of the automobile networking are becoming more common, and under the background, the information security protection mechanism of the automobile-mounted communication network is becoming more important. As the demand of vehicles for network information increases, the vehicle-mounted CAN network gradually opens an interface, so that information security attack from the outside CAN be inserted into the CAN bus network through a wireless network (bluetooth, wireless local area network) or an online diagnosis interface, thereby causing serious consequences such as illegal monitoring of CAN messages, malicious modification of CAN messages, rebroadcast and the like.
Protection of vehicle-mounted communication is indispensable for functional safety and information safety of vehicles. Specifically, the message is created at the transmitting end, and the message is verified at the receiving end, so that illegal operation of information on the bus can be effectively prevented, and the intrusion of third party information is resisted.
The secure vehicle-mounted communication (Secure Onboard Communication, secOC), defined by the vehicle open system architecture (Automotive Open System Architecture, AUTOSAR), is applied in the automotive industry to protect the integrity and authenticity of vehicle-mounted communications. The SecOC module belongs to an independent module in the AUTOSAR, and aims to provide a resource efficient and practical authentication mechanism for Protocol Data Unit (PDUs) data interaction. That is, the SecOC module can provide authentication for data transmitted on the bus, and can effectively detect attack means such as data playback, spoofing, tampering, and the like. Wherein SecOC uses a symmetric key and a freshness value (Freshnessvalue ， FV) are managed. In the whole life cycle monotonic increasing management mode of the fresh value, the sending device and the receiving device have different moments after the whole car is powered on or waken up in a dormancy mode, so that FV replay can be caused. The method comprises the following steps of determining the number of message information received by a receiving device according to a management mode of monotonically increasing the whole life cycle of the fresh value. In a specific implementation, when the receiving device receives the nth message information in the running process of the vehicle, the value of the receiving counter is N corresponding to the nth message information, and further, when the receiving device receives the (n+1) th message information, the value of the receiving counter is n+1.
In view of this, in order to solve the problem that the vehicle-mounted communication cannot be synchronized due to the playback of the fresh value, the embodiment of the application provides a method and a device for updating information in the vehicle-mounted communication. The method and apparatus for updating information in vehicle-mounted communication according to the embodiments of the present application are described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flowchart of a method for updating information in vehicle-mounted communication according to an embodiment of the present application, where the method is applied to a receiving device, and includes the following steps:
step 110, receiving the first message information sent by the sending device when the receiving device is in a power-on state.
The first message information may be control message information, communication message information, and the like, which is not limited in this embodiment. In order to ensure the communication safety, in the vehicle-mounted communication, the message content to be sent by the sending device is added with a fresh value and a message authentication code, so that the safety of the message information sent by the sending device is improved. The message authentication code is generated by adding a fresh value to the message content through a related generation algorithm, and the embodiment is not limited to this specific generation algorithm.
Alternatively, the generation algorithm of the message authentication code may use AES-CMAC.
In addition, in order to further improve the communication security, keys are also provided at both the transmitting device side and the receiving device side, wherein the symmetric keys, that is, the transmitting device and the receiving device use the same key to perform encryption and decryption operations on the message information. In particular, a Freshness Value (FV) is used for replay protection, a message authentication code (Message authentication code, MAC) is used for checking integrity, and a key is used to ensure message authenticity.
In an alternative embodiment, the original data of the message information is sliced, a message authentication code corresponding to the message information is generated through an AES-CMAC algorithm by adding a secret key and a fresh value, and then the slice of the identity authentication code and the slice of the fresh value are inserted into a designated byte of the message information, so that the safety of the message information is improved.
Step 120, in the case that the first message information satisfies the verification condition, updating the first value corresponding to the receiving counter to the first target value according to the difference between the first fresh value and the first value corresponding to the receiving counter, where the first fresh value is the fresh value in the first message information, and the first value is the fresh value of the last message information received by the receiving device.
In this embodiment, after the receiving end is powered on, the received current message information is checked, and the checked fresh value is updated, so as to improve the matching degree between the information received by the receiving device and the information sent by the sending device.
The verification condition may include three aspects of a corresponding Freshness Value (FV), a Message Authentication Code (MAC), and a key in the message information. When checking the fresh value, the method can comprise the step of comparing the fresh value of the current message information with the fresh value of the last message information, and the check of the fresh value is realized by judging the difference value between the current message information and the fresh value of the last message information.
When the message authentication code is checked, the message authentication code corresponding to the current message information can be compared with the message authentication code corresponding to the message content sent by the sending device, and the check of the message authentication code is realized by judging whether the message authentication code and the message authentication code are consistent.
In the embodiment of the application, even if the receiving device is abnormally powered down in the running process of the vehicle, the fresh value corresponding to the receiving counter in the receiving device is updated, the synchronous updating of the fresh values of the receiving device and the sending device can be ensured, so that the synchronization of vehicle-mounted communication is ensured.
In an alternative embodiment, the first message information meeting the check condition includes that the freshness value of the first message information is greater than the freshness value stored in the receiving counter, and further includes checking a message authentication code, whether the message authentication code calculated at the receiving device is consistent with the message authentication calculated at the transmitting device, where the message authentication code generation algorithm may be AES-CMAC.
In the technical scheme provided by the embodiment of the application, the first message information sent by the sending device is received under the condition that the receiving device is in the power-on state, and the first value corresponding to the receiving counter is updated to the first target value according to the difference value of the first value and the first value corresponding to the receiving counter under the condition that the first message information meets the verification condition, wherein the first value is the fresh value in the first message information, and the first value is the fresh value of the last message information received by the receiving device. Since there is a certain relation between the difference between the first fresh value and the first value and whether the fresh value is replayed or not, the receiving device updates the value of the receiving counter according to the difference between the first fresh value and the first value, and the vehicle-mounted communication synchronization between the transmitting device and the receiving device can be ensured regardless of whether the transmitting device replays the fresh value or not.
In the embodiment of the application, even though the situation that the fresh value is not stored successfully in the current ignition period due to abnormal power failure of the transmitting or receiving node may exist in the vehicle test or operation process, the system can provide that the fresh value of the transmitting device before dormancy is stored, and the receiving device synchronously stores FV+1 after power-on, so that the receiving device can still ensure that the fresh value can be normally synchronized by the normal dormancy wakeup of the whole vehicle after the abnormal power failure.
Optionally, after step 120, the method further comprises:
and storing the first target numerical value into a target storage space, wherein the target storage space is used for storing the first target numerical value and a second target numerical value, and the second target numerical value is a value stored by the sending device.
In this embodiment, the first target value is stored in the target storage space, so as to reduce the problem of abnormal communication caused by the fact that the fresh value cannot be updated due to the fact that the fresh value is not stored when the receiving device is abnormally powered down. Wherein the target storage space may be a non-volatile storage space.
The fresh value in the message information sent by the sending device is also stored in the target storage space, and similarly, the method is also used for reducing the problem of abnormal communication caused by that when the receiving device is abnormally powered down, the fresh value corresponding to the message information which is not needed to be sent is not stored and cannot be updated.
Optionally, after the storing the first target value in the target storage space, the method further includes:
and executing a processing instruction corresponding to the first message information under the condition that the first target value is the same as the second target value.
After the updated fresh value is stored, the updated fresh value is compared with the value stored by the sending device in the target storage space, and under the condition that the values of the updated fresh value and the value are the same, the receiving device executes a processing instruction corresponding to the first message information sent by the sending device; and under the condition that the two values are different, reporting the abnormal fault of the vehicle communication by the receiving device.
In this embodiment, the first target value and the second target value in the target storage space are compared to determine the matching degree between the information received by the receiving device and the information sent by the sending device, so as to improve the communication security between the receiving device and the sending device in vehicle-mounted communication.
Optionally, in a case where the difference is greater than a first threshold, the first target value is the first freshness value;
and when the difference value is smaller than or equal to the first threshold value, the first target value is the sum of the first value and 1.
After the first message information meets the verification condition, comparing the fresh value of the first message information received by the receiving device with the fresh value of the last message information received by the receiving device, and updating the first value of the receiving counter according to the comparison result. Alternatively, the difference between the two may be compared with a first threshold, where the first threshold is a preset value.
And under the condition that the difference value of the two is larger than a first threshold value, updating the fresh value of the last message information stored in the receiving counter into the fresh value in the first message information, wherein the first target value is equal to the first fresh value.
And under the condition that the difference value of the two is smaller than or equal to a first threshold value, updating the fresh value of the last message information stored in the receiving counter to be a first target value, wherein the first target value is equal to the sum of the fresh value of the last message information and 1.
In this embodiment, the difference between the fresh value of the first message information received by the receiving device and the fresh value of the last message information received by the receiving device is compared with a first threshold value, so as to select to update the corresponding first value in the receiving counter, thereby improving the accuracy of the updated information in vehicle-mounted communication.
Optionally, the first threshold is greater than or equal to 3.
When the difference between the fresh value of the first message information received by the receiving device and the fresh value of the last message information received by the receiving device is more than 0 and less than or equal to 3, updating the first value corresponding to the receiving counter to be the first target value, wherein the first target value is equal to the sum of the fresh value of the last message information received by the receiving device and 1.
And when the difference value between the fresh value of the first message information received by the receiving device and the fresh value of the last message information received by the receiving device is more than 3, updating the first value corresponding to the receiving counter into a first target value, wherein the first target value is equal to the fresh value of the first message information.
In this embodiment, the first threshold is set to update the first value corresponding to the received counter by two different strategies, so as to improve the accuracy of the updated information in the vehicle-mounted communication.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an information updating apparatus in vehicle-mounted communication according to an embodiment of the present application, where the apparatus includes:
a receiving module 210, configured to receive the first message information sent by the sending device when the receiving device is in a power-on state;
and the updating module 220 is configured to update the first value corresponding to the receiving counter to a first target value according to a difference value between the first fresh value and the first value corresponding to the receiving counter when the first message information satisfies the verification condition, where the first fresh value is a fresh value in the first message information, and the first value is a fresh value of a previous message information received by the receiving device.
Optionally, the apparatus further comprises:
the storage module is used for storing the first target numerical value into a target storage space, the target storage space is used for storing the first target numerical value and a second target numerical value, and the second target numerical value is a value stored by the sending device.
Optionally, the apparatus further comprises:
and the execution module is used for executing the processing instruction corresponding to the first message information under the condition that the first target value is the same as the second target value.
Optionally, in a case where the difference is greater than a first threshold, the first target value is the first freshness value;
and when the difference value is smaller than or equal to the first threshold value, the first target value is the sum of the first value and 1.
Optionally, the first threshold is greater than or equal to 3. The apparatus corresponds to the information updating method shown in fig. 1, and all embodiments of the information updating method shown in fig. 1 are applicable to the embodiments of the apparatus, and the same technical effects can be achieved.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.
Claims (8)
1. An information updating method in vehicle-mounted communication, applied to a receiving device, is characterized by comprising the following steps:
receiving first message information sent by a sending device under the condition that the receiving device is in a power-on state;
updating a first numerical value corresponding to a receiving counter to a first target numerical value according to a difference value of the first numerical value and the first numerical value corresponding to the receiving counter when the first message information meets the checking condition, wherein the first numerical value is a fresh value in the first message information, and the first numerical value is a fresh value of the last message information received by the receiving device;
the first target value is the first freshness value if the difference is greater than a first threshold;
and when the difference value is smaller than or equal to the first threshold value, the first target value is the sum of the first value and 1.
2. The method of claim 1, wherein after the updating the first value corresponding to the receive counter to the first target value, the method further comprises:
and storing the first target numerical value into a target storage space, wherein the target storage space is used for storing the first target numerical value and a second target numerical value, and the second target numerical value is a value stored by the sending device.
3. The method of claim 2, wherein after the storing the first target value to a target storage space, the method further comprises:
and executing a processing instruction corresponding to the first message information under the condition that the first target value is the same as the second target value.
4. The method of claim 1, wherein the first threshold is greater than or equal to 3.
5. An information updating apparatus in vehicle-mounted communication, comprising:
the receiving module is used for receiving the first message information sent by the sending device under the condition that the receiving device is in a power-on state;
the updating module is used for updating the first numerical value corresponding to the receiving counter into a first target numerical value according to the difference value of the first numerical value corresponding to the receiving counter when the first message information meets the checking condition, wherein the first numerical value is the fresh value in the first message information, and the first numerical value is the fresh value of the last message information received by the receiving device;
the first target value is the first freshness value if the difference is greater than a first threshold;
and when the difference value is smaller than or equal to the first threshold value, the first target value is the sum of the first value and 1.
6. The apparatus of claim 5, wherein the apparatus further comprises:
the storage module is used for storing the first target numerical value into a target storage space, the target storage space is used for storing the first target numerical value and a second target numerical value, and the second target numerical value is a value stored by the sending device.
7. The apparatus of claim 6, wherein the apparatus further comprises:
and the execution module is used for executing the processing instruction corresponding to the first message information under the condition that the first target value is the same as the second target value.
8. The apparatus of claim 5, wherein the first threshold is greater than or equal to 3.
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| CN202210849494.5A CN115190578B (en) | 2022-07-19 | 2022-07-19 | Information updating method and device in vehicle-mounted communication |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109600364A (en) * | 2018-12-04 | 2019-04-09 | 东软集团股份有限公司 | A kind of method, apparatus that realizing information authentication and storage equipment, program product |
| JP2020065176A (en) * | 2018-10-17 | 2020-04-23 | 日立オートモティブシステムズ株式会社 | Information processing device and management device |
| CN111917619A (en) * | 2020-07-29 | 2020-11-10 | 华人运通(江苏)技术有限公司 | Communication method, communication device, electronic equipment and readable storage medium |
| CN113472620A (en) * | 2021-06-23 | 2021-10-01 | 重庆长安汽车股份有限公司 | Management method and system for in-vehicle message authentication fresh value |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5589410B2 (en) * | 2010-01-29 | 2014-09-17 | 沖電気工業株式会社 | Communication system and communication apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020065176A (en) * | 2018-10-17 | 2020-04-23 | 日立オートモティブシステムズ株式会社 | Information processing device and management device |
| CN109600364A (en) * | 2018-12-04 | 2019-04-09 | 东软集团股份有限公司 | A kind of method, apparatus that realizing information authentication and storage equipment, program product |
| CN111917619A (en) * | 2020-07-29 | 2020-11-10 | 华人运通(江苏)技术有限公司 | Communication method, communication device, electronic equipment and readable storage medium |
| CN113472620A (en) * | 2021-06-23 | 2021-10-01 | 重庆长安汽车股份有限公司 | Management method and system for in-vehicle message authentication fresh value |
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