Abstract: File hiding technology is a kind of significant data security protection method．The FAT32file system is a good file system for compatibility,and widely used in removable storage service based on flash memory．By analyzing the pattern of files regulation and the features of storage of FAT32,we proposed a new method,which realizes file hiding by erasing and transferring the directory entry of destination files to rewrite the FATs through redirection technology．Theoretical analysis and experimental results show that this method has the characteristics of large capacity,good concealment,strong robustness and excellent security,but low efficiency in hiding large files.

Key words: File system,File hiding,File allocation table(FAT),Redirection