With a mass of practical work in researching and developing a commercial secure operating system ( os ) in accordance with the newest achievements related to studing in framework for multi - policies ( fmp ) , security models and secure os , research on theory of fmp and it ' s enforcement in secure os is conducted in this dissertation 本文以一个商品化安全操作系统的大量实际开发工作为基础，结合国内外在多安全政策支持框架、安全模型和安全操作系统等方面的最新研究成果，对多安全政策支持框架的理论及其在安全操作系统中的实施进行了研究。
Therefore , on the basis of studies on information supporting frame of the network - based designing , security technologies are discussed respectively in accordance with the general request on information security . the technology architecture of information security of the network - based design is brought forward 根据网络化设计的信息安全总体要求，在研究网络化设计的信息支持框架的基础上，分层讨论其信息安全技术，提出了网络化设计信息安全技术体系。 ( 3 )密码技术是信息安全的核心。
