This paper introduces the theory of access control model based on role and task, and analyzes task and the shortage of above models.

介绍了基于角色的访问控制模型和基于任务的访问控制模型的原理。

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In this paper, the basic concept and theory of access-list is detailedly discussed. Finally, the solution of network security is given.

文章就访问表的基本概念及工作原理进行了探讨，最后给出了基于访问表的各种安全控制策略及实现方案。

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In theory this can use any of the mechanisms described for general SOA interactions and these controls will result in a user name which can then be used for the finer grained access controls.

从理论上而言，这可以使用可用于通用soa交互的任何机制，这些控制将得到一个用户名，此用户名可随后用于进行更为细粒度的访问控制。

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In theory, competition between providers of internet access should prevent this from happening.

ECONOMIST: The internet: The web's new walls | The

The U.S. could, in theory, disable or deny access to the system by others in the event of a conflict, although it says it never has done so in the past.

WSJ: Beijing Launches GPS Rival

The advent of health reform means, at least in theory, that more Americans will have access to affordable healthcare, with premiums based on their income.

FORBES: Forget the Half-Baked Theories on Hostess. We Need Fresh Solutions to Help the Workers Left Behind.