Trusted operating system
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Trusted Operating System (TOS) generally refers to an operating system that provides sufficient support for multilevel security and evidence of correctness to meet a particular set of government requirements.
The most common set of criteria for trusted operating system design is the Common Criteria combined with the Security Functional Requirements (SFRs) for Labeled Security Protection Profile(LSPP) and Mandatory Access Control(MAC). The Common Criteria is the result of a multi-year effort by the governments of the U.S., Canada, United Kingdom, France, Germany, and the Netherlands to develop a harmonized security criteria for IT products.
Examples of certified trusted operating systems are:
- HP-UX 10.26
- PitBull for AIX 5L
- Trusted Solaris
- Trusted UNICOS 8.0 (Rated B1)
- XTS-400
Examples of operating systems that might be certifiable are:
Companies that have created trusted operating systems include:
- Addamax (BSD, SVR3, SVR4, HP/UX)
- Argus Systems Group (Solaris, AIX)
- AT&T (System V)
- Bull (AIX)
- Data General (DG/UX)
- Digital Equipment Corporation (Ultrix)
- Gemini Computers (GEMSOS)
- Harris Corporation (SVR3, SVR4)
- Hewlett-Packard(HP/UX)
- Honeywell (Multics)
- IBM (OS/390, AIX)
- SCO (SCO Unix)
- Secure Computing Corporation (LOCK, Mach, BSD)
- SecureWare (Apple A/UX, HP/UX, SCO)
- Sequent (Dynix/ptx)
- Silicon Graphics (IRIX)
- Sun Microsystems (SunOS, Solaris)
- Trusted Information Systems (Xenix, Mach)
- BAE Systems (XTS Unix)
See also
- Comparison of operating systems
- Security-evaluated operating system
- Security-focused operating system