Authentication technique based on digital fragile watermarking has gradually been one of the most important researches for its advantage in digital media authentication field.

基于数字易碎水印的认证技术因为更适合对数字图像进行认证，逐渐成为该领域的一个重要研究方向。

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When the form is posted, the value of this field is compared to the value of the authentication key in session, to verify that the form submission was valid.

当表单被提交时，系统将把此字段的值与会话中的认证密钥值相比较，以检验表单提交是否有效。

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HTTP authentication means that the HTTP request has to have an HTTP header field with the userid and password.

HTTP认证意味着HTTP请求必须具有一个带有用户标识和口令的http头字段。

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In addition to his academic work, Abou El Fadl had spent the year studying for certification in a top-level field of Islamic jurisprudence called hadith authentication.

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