Safety protection method of controller, main chip of controller and controller

Abstract

The invention provides a safety protection method of a controller, a main chip of the controller and the controller, the controller comprises the main chip and a safety chip arranged outside the main chip, the main chip comprises a starting bootstrap program area and an application program area; and in the power-on process of the controller, the main chip starts and enters the starting bootstrap program area, a corresponding secret key and a digital signature can be obtained from the security chip, a corresponding verification digital signature is calculated according to the secret key; and when the verification digital signature is matched with the corresponding digital signature, the main chip completely runs a starting bootstrap program, the main chip skips to the application program area after running of the starting bootstrap program is completed, then safe starting of the controller is completed, and the problems that in an existing safe starting scheme of the controller, the cost of the safe starting function is high, and the safe starting function of the controller is difficult to achieve when the performance of a main chip is reduced can be effectively solved.

Description

technical field [0001] The present application relates to the technical field of controllers, in particular to a controller security protection method, a main chip of the controller and the controller. Background technique [0002] With the development of various intelligent systems (such as automotive intelligent network connection systems), the controllers of the systems (such as motor controllers of automobiles, etc.) are facing more and more security threats. Among them, one kind of security threat is to illegally tamper with the boot program in the controller, and use the tampered boot program to start the controller, causing other components in the system to fail to operate normally; another security threat is to illegally tamper with The application program in the controller, and refresh the controller with the tampered application program, so as to change the working logic of the controller. [0003] Such as figure 1 As shown, the existing conventional function for...

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Problems solved by technology

[0009] An object of the present invention is to provide a security protection method for a controller and a controller, which can solve the problems in the prior art that the performance requirements of the main chip of the controller are relatively high, the cost of the safe start function of the controller is relatively high, or that the main chip cannot It is difficult to realize the controller safe start function when the performance is degraded

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