What is MILS?

Multiple Independent Levels of Security (MILS) is a high-assurance computer security architecture that enables the secure execution of multiple applications or operating systems at different security levels on the same hardware platform. It achieves this by partitioning the system into isolated compartments, ensuring that information cannot flow improperly between them. MILS is commonly used in safety-critical and security-critical systems, such as avionics, defense, and industrial control systems.