理想的最高效的身份验证解决方案是单点登录(single sign - on,SSO)解决方案；在这种解决方案中，用户只需要登录一次，就可以向所有网络资源验证他的身份。
And the ideal and most efficient authentication solution is a single sign-on one, or SSO, in which the user only has to log in once and is authenticated to all of the network resources.
这不会影响到受信的单点登录类型的定制提供者，前提是底层的提供者可以正常方式验证通过。
This does not affect trusted signon type custom providers, providing that the underlying provider can be authenticated to in the normal way.
在单点登录场景中，它读取会话中可能存在的令牌，令牌是由识别用户的更高的身份验证层放在会话中的。
In single sign-on scenarios it reads in a token from the session possibly placed in the session by some higher-level authentication layer which identifies a user.
单点登录功能是由应用服务器使用目录提供的。
Single sign-on is provided through the application server's use of the directory.
Kerberos的一个关键特性是它支持单点登录环境，在这种环境中，用户只需向kerberos域中的资源做一次身份证明。
One key feature of Kerberos is that it permits a single sign-on environment whereby a user need only verify his identity to the resources within the Kerberos realm once.
SDK提供两种方法进行身份认证，一种称之为单点登录，如果安装了的话，它使用原生的Facebook应用程序对话框，另一种是默认的WebView方法。
The SDK provides two methods to authenticate, one that is referred to as single-sign on which USES, if installed, the native Facebook application dialogs, and the default WebView approach to dialogs.
第一步是一步步地创建一个新的单点登录portlet，而不是直接修改DocumentManagementportlet。
The first step is to create a new single sign-on portlet step by step, rather than modifying the Document Management portlets directly.
因此，研究开发一套能够支持不同的认证方式、单点登录的统一认证平台是很有必要的。
Therefore it is necessary for us to develop a unified authentication system to support different authentication ways and single sign-on.
支持多认证方式的单点登录是目前的一个新需求，通常这又使认证协议的实现和跨域的认证更加复杂。
The requirement of supporting multiple authentication in single sign-on scheme often complicates the realization of authentication protocol and cross-realm authentication.
支持多认证方式的单点登录是目前的一个新需求，通常这又使认证协议的实现和跨域的认证更加复杂。
The requirement of supporting multiple authentication in single sign-on scheme often complicates the realization of authentication protocol and cross-realm authentication.
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