Bus line fire wall of embedded system

Abstract

The invention relates to a firewall protection embedded in a bus system, which is characterized in that a bus IP core realized with FPGA logic integration technology is connected in series between the interface bus of embedded processor and the peripheral interface of the embedded processor to real-time monitor the instructions at the key ports of the embedded system, wherein, the bus IP core adopts forward regular mapping to identify normal port instructions and intercept abnormal port instructions; the bus IP core comprises three layers of organizational structure, that are, a bus adapting interface, bus firewall arranged in the firewall prevention layer, and a standard bus interface; the function of the bus firewall is realized with the special function module in the bus firewall embedded in the IP core firewall protection layer; the special function module comprises a work-mode selecting module, a through mode module, a filter mode module, a rule learning module, a bus monitor module, a signal buffer module, a state coding module, and a state detector module; the inside of the bus firewall is connected mutually with the signal relative with the bus information.

Description

(1) Technical field: [0001] The invention relates to a bus firewall for an embedded system, which relates to a bus firewall for monitoring digital information transmission of an embedded computer system, in particular to a system for monitoring information transmission on an interface bus of an embedded computer system to realize security protection of the embedded system A bus firewall belongs to the technical field of computers. (two) background technology: [0002] With the development of network technology and wireless communication technology, embedded system applications continue to expand its breadth and depth, ranging from satellite remote control orbit change to the realization of digital home networks. Embedded systems have shown their vitality in participating in wireless communication and network transformation. At the same time, security problems of embedded systems have surfaced, and these problems may often lead to major economic losses or personal injuries, s...

AI Technical Summary

Problems solved by technology

Once the embedded system communicates with the outside world through wireless communication or access to the network, this closed and introverted security mechanism is difficult to deal with the threat of malicious intrusion

Due to the limited storage capacity, the embedded system can only limitedly use the technical achievements such as intrusion detection and fire prevention filtering obtained in the field of general-purpose computers. The embedded system security system established by the protection of the outer layer protocol is easy to be broken, the detection is incomplete, and the storage space of the system is occupied. , slow response time, etc.

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