A method and system for multi-level locking of embedded devices

A technology of embedded devices and operating systems, applied in the direction of digital data protection, etc., can solve problems such as multi-level locking of embedded devices, and achieve the effect of not increasing modification costs and being highly scalable.
CN109858276BActive Publication Date: 2022-03-04AEROSPACE INFORMATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INFORMATION
Publication Date
2022-03-04

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Abstract

The invention discloses a method for multi-level locking of an embedded device. The method includes: modifying the printing function of the operating system kernel of the embedded device so that all the printing information after the operating system kernel is started all point to The preset position realizes the locking of the operating system kernel of the embedded device; the locking of the underlying file system for remote network upgrade based on the locking of the operating system kernel of the embedded device includes: the startup process enters the file system layer, and the system starts The script is executed; judge whether the state of the file system shielding script is normal, and if it is not normal, directly skip and enter the unlocked state; otherwise, execute the system shielding script, and shield the debugging serial port as a process after the system shielding script starts All system interruptions and keyboard and mouse operation responses are only allowed to process normal tax information through the application layer and realize the locking of the underlying file system.
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Description

technical field

[0001] The present invention relates to the technical field of embedded device security, and more particularly, to a method and system for multi-level locking of embedded devices. Background technique

[0002] With the development of economy and society, more and more small embedded devices are used in various fields such as life and industrial production. The Linux operating system is currently the most widely used underlying operating system in embedded devices. It mainly has the following four advantages: 1. It supports cross-hardware platforms. The Linux kernel is mainly written in C language and uses a portable Unix standard application program interface. , so it has obtained cross-platform hardware support; 2. The occupation of system resources is very small, and the device with 64M memory can run smoothly; 3. The stability is very good, and it can run as a server all year round without shutting down; 4. , The kernel code is open source. On the one han...

Claims

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