关键词: 零水印, 半脆弱水印, 内容认证, 篡改定位, 自适应分帧

Abstract: This paper proposed a new semi-fragile audio zero-watermarking algorithm which can be used to authenticate the copyright and content of digital data. This algorithm has the following features: (1) it extracted the low frequency components of host audio to construct zero-watermarking, ensured the imperceptibility of watermarking algorithm, and achieved blind detection; (2) it distributed the pixels of watermarking images rationally by adopting an adaptive audio segmentation frame method, and improved the capability of tampering localization and robustness of regular attacks; (3) it used multilevel scrambling technology to eliminate the correlation of the watermarking images, improved its safety and the robustness toward regular attacks. Meanwhile, this algorithm can not only conduct the integrity authentication, but also locate the tampering area accurately by tampering assessment. The experimental result shows that this algorithm has good robustness toward regular attacks and strong capability of tampering localization toward malicious attacks.

Key words: zero-watermarking, semi-fragile watermarking, content authenticity, tampering location, adaptive frame