Otherwise, you can require the user to answer a challenge question before the system will E-mail his password.
否则，你需要在系统发送密码电子邮件前让用户回答预先安排好的问题。
If none exists, a configurable form-based challenge is issued to prompt for a valid user id and password.
如果没有有效的用户凭证，则发出一个可配置的基于表单的询问，要求提供有效的用户ID和密码。
The application requires a user ID and password by sending a 401 challenge, then the browser sends back the user ID and password included in the HTTP authorization header.
该应用程序通过发送一个 401质询要求用户ID和密码，然后浏览器发送回包含在HTTP授权Header 中的用户 ID 和密码。
As a response to the challenge, the client sends a digest that is based on the user's password together with data that is known both to the client and to the server.
用户端会传送以使用者密码为根据的摘要，以及用户端和伺服器都认得的资料，做为验证要求的回应。
As a response to the challenge, the client sends a digest that is based on the user's password together with data that is known both to the client and to the server.
用户端会传送以使用者密码为根据的摘要，以及用户端和伺服器都认得的资料，做为验证要求的回应。
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