Tomoyo Linux (stylised as TOMOYO Linux) is a Linux kernel security module which implements mandatory access control (MAC).
Overview Tomoyo Linux is a MAC implementation for Linux that can be used to increase the security of a system, while also being useful purely as a systems analysis tool. It was launched in March 2003 and was sponsored by NTT Data Corporation until March 2012.
Tomoyo Linux focuses on system behaviour. Tomoyo Linux allows each process to declare behaviours and resources needed to achieve their purpose. When protection is enabled, Tomoyo Linux restricts each process to the behaviours and resources allowed by the administrator.
Features The main features of Tomoyo Linux include:
System analysis Increased security through Mandatory Access Control Automatic policy generation Simple syntax Ease of use
History and versions Tomoyo was merged in Linux Kernel mainline version 2.6.30 (2009, June 10)/ It is currently one of four standard Linux Security Modules (LSM), along with SELinux, AppArmor and SMACK.
The Tomoyo Linux project started as a patch for the Linux kernel to provide MAC. Porting Tomoyo Linux to the mainline Linux kernel required the introduction of hooks into the LSM that had been designed and developed specifically to support SELinux and its label-based approach.
However, more hooks are needed to integrate the remaining MAC functionality of Tomoyo Linux. Consequently, the project is following two parallel development lines:
Naming The name 'TOMOYO' is, officially speaking, a backronym for "Task Oriented Management Obviates Your Onus". According to one of the developers Tetsuo Handa, it's also a reference to the character Tomoyo Daidouji from Cardcaptor Sakura.
References
External links Comparison chart of 1.x and 2.x Comparison chart of Tomoyo 1.x, 2.x, and Akari Tomoyo Linux project Tomoyo Linux at Embedded Linux Wiki LWN : Tomoyo Linux and pathname-based security Tomoyo – Debian Wiki Tomoyo Linux – ArchWiki