Controller local area network bus encryption method, device, equipment and medium

A technology of network bus and encryption method, applied in bus network, data exchange network, data exchange through path configuration, etc., can solve the problem of no CAN bus encryption method, etc.
CN113285956AActive Publication Date: 2021-08-20CHINA FIRST AUTOMOBILE
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA FIRST AUTOMOBILE
Publication Date
2021-08-20

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Abstract

The embodiment of the invention discloses a controller local area network bus encryption method and device, equipment and a medium. The method comprises the following steps: determining a key of a message to be sent corresponding to a controller area network (CAN) bus, and sending the key to a receiving end through the CAN bus; and encrypting the message to be sent according to the key to obtain an encrypted message, and sending the encrypted message to the receiving end through the CAN bus, so that the receiving end decrypts the received encrypted message according to the key. According to the technical scheme provided by the embodiment of the invention, through interaction between the sending end and the receiving end, CAN bus encryption can be simply and quickly realized, the to-be-sent message corresponding to the CAN bus does not need to be processed, and the network load and the burden of a processor are reduced.
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Description

technical field

[0001] The embodiments of the present invention relate to encryption technology, and in particular to a controller area network bus encryption method, device, equipment and medium. Background technique

[0002] With the application of vehicle-mounted Ethernet, the security vulnerability of the vehicle-mounted Controller Area Network (CAN) bus has been exposed, and how to encrypt the CAN bus has become an important research direction.

[0003] Among the commonly used CAN bus encryption methods, the Advanced Encryption Standard (AES) encryption algorithm is widely used, but the block length of the AES encryption algorithm is fixed at 128 bits, and the maximum data length of the message data of the CAN bus It is 64 bits, so it is necessary to reassemble the message data of the CAN bus to obtain new data, encrypt the new data through the AES encryption algorithm, and then transmit the encrypted data through the CAN bus.

[0004] There is no better CAN bus encryp...

Claims

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