摘要： 目前开放分布系统中的协调技术主要考虑如何促使计算实体之间的交互能够顺利通畅地进行，而实际上出于安全的考虑必须要有一定的访问控制措施来限制这些软件实体之间某些交互。该文提出一种新的协调模型，把协调和访问控制两者结合起来，该模型具有安全和可扩展等优点。

关键词: 协调, 访问控制, 策略, 分布环境

Abstract: Coordination in distributed computing typically concerns with enabling interaction among computing entities and help them cooperate with each other. But in fact, access control should be considered to restrain interaction to make interactions harmless. Thus, a new coordination model is introduced in which coordination is combined with access control. The model has two advantages of being secure and scalable.

中图分类号: 

• TP393.08