Finally, there is strong authentication in which an identity is verified using two or more methods, such as a password and a cryptographic key.
最后是强身份验证，其中使用两种或者更多的方法对一个标识进行验证，如密码和加密密钥。
The paper has provided methods of uniform identity authentication based on the sign-on agent.
提出了一种基于登录代理的统一认证方法。
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