Research on Embedded System Firewall Based on Flexible Bus

This paper proposes a bus firewall model for embedded system,which has built the intrusion immunity function on the system bottom frame.After importing the embedded system flexible bus and describing it with formalization mathematical method,a universal bottom frame is acquired.Based on this work,the paper adopts a positive rule mapping idea to establish the firewall rules.Experiments demonstrate that the firewall has good transplantability and high intrusion recognition rates.