Existing internet application models are, in our opinion, still quite deficient in providing active operation and security. We propose to reduce much of these deficiencies with a new distributed information active service designed by us.rn Like others, we employ CORBA,Java, and ONM(object navigation model). In Section 2, we discuss how to reduce the two deficiencies. Briefly, our design contains two features:rn (1) Provision for active operation. We provide an asynchronous communication broker to push information. The server in the three-tier architecture pushes info rmation in accordance with selection standards stipulated by the client.rn (2) Three-tier security mechanism. It contains security channel, application layer security and database security.rn The distributed information active service designed by us has been implemented by us and operated satisfyingly since May 2000 in a satellitic control information system.%目前将分布对象计算技术引入Internet／Intranet成为新的研究热点，形成了对象Web体系 结构。结合CORBA与Java的特性提出了一种新的对象导航模型ONM(object navigation m odel)，并利用该模型建立了分布信息主动服务，为Web用户的信息访问提供了透明性、主动 性和安全性。本文着重讨论了分布信息主动服务的对象导航模型、主动性以及安全防护机制。
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