The Study of Access Mechanism for the Security of Linux

Abstract

TCSEC standard is defined by the U.S. Department of Defense as the operating system security evaluation criteria. Under this standard, Linux system has a higher security level, but there are still some dangers, such as the coarseness of file access granularity. In this paper, we have studied the file access mechanism of Linux, analyzed the security module of LinuxLSM, and then designed the file access mechanism ACL, achieved fine-grained access to files, thus improving the system security level of Linux.