安全调查人员最近证明，利用 MD5 算法允许他们伪造可用的证书。

Security researchers have recently demonstrated exploits against the MD5 algorithm which allowed them to forge usable certificates.

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针对数字图像取证中一类常见的复制粘贴图像伪造，本文提出了一种基于小波变换和奇异值分解的检测算法。

Aiming at a common copy-paste forgery in the research field of digital image forensics, this paper proposes a detection approach based on wavelet transform and singular value decomposition.

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通过在包含同质或均匀区域的彩色伪造图像中的实验，进一步验证了本算法的有效性。

Experimental results on several forged images with various homogeneous or uniform regions were presented to demonstrate the effectiveness of the proposed algorithm.

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