The Multilevel Information Systems Security Initiative (MISSI) is an NSA effort to make available products that could be used to construct systems that would satisfy user Multi-level Security (MLS) requirements. MISSI includes the development of products in four categories: the Crypto Peripheral, Network Security Management, Secure Network Server, and Workstation Security Applique. These products comprise the set of security components needed to construct Automated Information Systems (AIS) that satisfy MLS requirements.