本文针对面向对象的分布式环境ＯＺ的通信安全要求，应用密码学技术，设计了基于公开钥算法的安全认证系统，进行ｃａｌｌｅｒ与ｃａｌｌｅｅ之间的身份认证。在面向对象的分布式环境ＯＺ中，提供认证安全服务，不仅可以避免不正确的存取、更改、盗窃、中途攻击，而且能有效地管理密钥。采用面向对象（ｏｒｉｅｎｔｅｄ－ｏｂｊｅｃｔ）策略、使用最先进的Ｊａｖａ语言实现了这个认证子系统。 In this paper, OZ communication security requirements of OO are discussed. By using cryptography, a security authentication system based on public key algorithm is designed to authenticate caller and callee. In the object-oriented distributed environment OZ, authentication security services are provided to not only prevent incorrect access, alteration, theft, midway attacks, but also to efficiently manage keys. This certification subsystem is implemented using the most advanced Java language using an object-oriented strategy.