在网格环境中，信任管理是一个新颖而又重要的安全问题。
Trust manage is new and important for security in grid environments.
在网格环境中，信任机制是解决网格服务安全问题的一种有效方法。
In grid environments, trust mechanisms are effective methods which can solve security problems of grid services.
本文在网格环境中探讨了数据副本创建策略，包括城内副本衍生和域间副本扩展策略。
This paper discusses the data replication strategies for the network environment, including the intra-domain replica derivation and the inter-domain replica expansion.
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