ADFS使用SSL和公开密钥加密等一组安全协议，提供了单次登录访问没有放在内部网络上的应用程序这个便利。

ADFS USES a set of secure protocols like SSL and Public Key encryption to provide Single Sign on to applications that are not hosted inside your network.

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结合单钥加密和双钥加密的理论，分别给出了纵向的等级安全管理密钥管理方法和横向的协同工作安全管理的工作组密钥管理方法。

With the application of symmetric cipher and asymmetric cipher, a cryptographic key management scheme for hierarchy is presented and a workgroup cryptographic key management scheme is presented.

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