缺点在于，如果联合被破坏，很少有防护措施来防止未经授权的用户获得对受控信息的访问。
The disadvantage is that if the federation is corrupted, few safeguards prevent an unauthorized user from gaining access to controlled information.
出站请求：与前一个条目类似；内部用户怎样访问受控环境中的外部服务？
Outbound Requests: Similar to the previous entry; how can internal users get access to outside services in a controlled environment?
标准的基于角色访问控制（RBAC）通过角色对用户和权限进行解耦，从受控资源角度来讲是一维的。
The normal Role-Based Access Control(RBAC) model configures the model resources through roles, and this model is one-dimensional according to the manipulated resources.
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