A novel Multiple Independent Levels of Security/Safety Cross Domain solution

Contexts like Defense and Aerospace are steadily focused on high assurance solutions designed to protect their data. One of the most relevant and unresolved issue is the Multilevel Security problem. Information and Communications Technology systems have to exchange data, to be regularly patched and updated hence, they require a link to the Internet. Through this connection and through a compromised host, an attacker could illicitly disclose sensitive information. In this paper is presented a novel Multiple Independent Levels of Security/Safety solution that enforces the security policies in a cross-domain environment. The innovative approach is explained in detail and the robustness of the solution is evaluated in a theoretical way, supported by tools specifically designed to analyze security protocols and by preliminary vulnerability and penetration tests.