在通信通道上用一种安全的方法给有经验的用户提供验证和属性信息的标准化机制。
Standardized mechanisms to provide sophisticated user authentication and attribute information in a secure way over a communications channel.
当需要提供安全相关的附加信息并将其附加到实际用户标识（主题）时，可以使用这些安全属性来保存该信息。
When additional security related information should be present, attached to the actual user identity (subject), then security attributes can hold this information.
信息安全的利益在于——保护计算机系统和网络——具有其余生俱来的的不可见属性：如果危险已经转移，则一切都会正常工作。
The benefits of information security-protecting computer systems and networks-are inherently invisible: if threats have been averted, things work as normal.
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