Vehicle-mounted device, system for implementing in-vehicle communication, and related method

Abstract

The invention discloses a vehicle-mounted device. An ECU of the vehicle-mounted equipment is provided with an encryption chip, a secret key is stored in the encryption chip, the secret key is stored in a storage, protected by hardware and inaccessible to software, of the encryption chip, and the encryption chip is used for generating a check code according to the secret key and a to-be-processed message based on a symmetric encryption algorithm. Systems and related methods for implementing in-vehicle communication are also disclosed. According to the method, the ECU with the encryption chip isarranged for the vehicle-mounted equipment, the encryption chip is used for storing the secret key and executing the encryption process, so that the messages transmitted between the vehicle-mounted equipment are encrypted and protected in a hardware encryption mode, and the requirements of the in-vehicle communication process for the safety and the communication speed are met.

Description

technical field [0001] The present invention relates to the field of automobiles, in particular to an on-vehicle device, a system for realizing in-vehicle communication, and a related method. Background technique [0002] Currently, in the process of in-vehicle communication between on-board devices of a vehicle, a method based on software encryption is used to encrypt and protect the messages transmitted between the on-board devices. However, the way of software encryption is to protect the key used for encryption by software, that is, the key is stored in a storage area that can be accessed by software and is not protected by hardware, so it is easy to cause the leakage of the key, and then affect the entire system. The functional safety of the vehicle. In addition, in order to meet the requirement of in-vehicle communication speed at millisecond level, the encryption algorithm adopted by the software encryption is not complicated and easy to be cracked. If a high encryp...

AI Technical Summary

Problems solved by technology

However, the way of software encryption is to protect the key used for encryption by software, that is, the key is stored in a storage area that can be accessed by software and is not protected by hardware, so it is easy to cause the leakage of the key, and then affect the entire system. car functional safety

In addition, in order to meet the requirements of millisecond-level in-vehicle communication speed, the encryption algorithm adopted by the software encryption is not complex and easy to be cracked

If a high encryption strength is to be ensured, the software encryption method needs to consume a large amount of ECU (Electronic Control Unit, electronic control unit) performance of the vehicle equipment and consume too much time, so that it cannot meet the requirements of the communication speed in the vehicle

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