The Implementation of an Embedded and Secure File System Used in Electric Application

According to the storing file and secure operations requirement in some electric application,this paper refers to the BLP security module and builds a secure and embedded file sytem——esfs(embedded and secure file system) based on uCOSII.This file system builds file mapping mechanism in RAM,which realizes the operations on the files stored in flash in the high-speed RAM,and it realizes the security by dividing them into the modules of esfs.It is characterized by non-directory management,security and small size,which makes it is useful in the area of electric application specially.