1 引言 关键词：半脆弱水印；图像认证；篡改恢复 [gap=938]Key words】self-fragile watermark; image authentication; tamper recovery
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As a branch of information security, digital image authentication watermarking aims to verify the integrality and authenticity of a host image and provide the tamper proofing by tamper localization and tamper recovery.
数字认证水印是信息安全领域的一项新兴技术,用于鉴别数字媒体的真实性和完整性,并通过篡改定位和篡改恢复来提供篡改证据。
参考来源 - 数字图像安全认证水印算法及其统计检测性能分析·2,447,543篇论文数据，部分数据来源于NoteExpress
在图像脆弱水印技术中，算法安全性、定位精度和篡改恢复效果是主要的研究方向。
In image fragile watermarking technique, the algorithm's security, the accuracy of localization and the capability of recovering tampered region are the main areas of research.
仿真实验表明，该算法对任意大小的亮度图像、RGB图像具有高精度的篡改定位能力，并且具有很好的篡改恢复性能。
The simulation results show that the proposed algorithm has precise tamper localization to any size of brightness images and RGB images, and has good tamper recovery performance.
同样在上周六，一位任务中女发言人称报道这一次任务的官方网站在受到一名黑客连夜篡改了其网站上头条消息后恢复正常。
Also Saturday, a spokeswoman for the mission said its public Web site was back up after a hacker managed to change the site's lead story overnight.
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