The phrase trusted operating system generally refers to an operating system that provides sufficient support for multi-level 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. 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.

= External links =