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在开放系统环境中，安全性是极为重要的一个方面。只有保证了安全性，才能体现出开放系统的优越性。本文对ＯＳＩ安全体系进行了分析，指出了该结构主要涉及的是通信安全性。通过分析开放系统的特点和安全需求，探明了开放系统安全性应包括三个方面：通信安全性（在ＯＳＩ通信安全性的基础上进行扩充）、端系统安全性和管理安全性。探讨了开放系统安全性的设计和实现方案。
In an open system environment, security is an extremely important aspect. Only to ensure the safety, in order to reflect the superiority of open systems. This paper analyzes the OSI security system, pointing out that the structure is mainly related to communication security. By analyzing the characteristics of open systems and security requirements, it is proved that open system security should include three aspects: communication security (based on OSI communication security), end system security and management security. Discusses the design and implementation of open system security.