An Improved Secure Semi-fragile Watermarking Based on LBP and Arnold Transform
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In this paper, we analyze a recently proposed semi-fragile watermarking scheme based on local binary pattern(LBP) operators, and note that it has a fundamental flaw in the design. In this work, a binary watermark isembedded into image blocks by modifying the neighborhood pixels according to the LBP pattern. However,different image blocks might have the same LBP pattern, which can lead to false detection in watermarkextraction process. In other words, one can modify the host image intentionally without affecting itswatermark message. In addition, there is no encryption process before watermark embedding, which bringsanother potential security problem. To illustrate its weakness, two special copy-paste attacks are proposed in thispaper, and several experiments are conducted to prove the effectiveness of these attacks. To solve theseproblems, an improved semi-fragile watermarking based on LBP operators is presented. In watermarkembedding process, the central pixel value of each block is taken into account and Arnold transform isadopted to guarantee the security of watermark. Experimental results show that the improved watermarkingscheme can overcome the above defects and locate the tampered region effectively.
Abstract
In this paper, we analyze a recently proposed semi-fragile watermarking scheme based on local binary pattern(LBP) operators, and note that it has a fundamental flaw in the design. In this work, a binary watermark isembedded into image blocks by modifying the neighborhood pixels according to the LBP pattern. However,different image blocks might have the same LBP pattern, which can lead to false detection in watermarkextraction process. In other words, one can modify the host image intentionally without affecting itswatermark message. In addition, there is no encryption process before watermark embedding, which bringsanother potential security problem. To illustrate its weakness, two special copy-paste attacks are proposed in thispaper, and several experiments are conducted to prove the effectiveness of these attacks. To solve theseproblems, an improved semi-fragile watermarking based on LBP operators is presented. In watermarkembedding process, the central pixel value of each block is taken into account and Arnold transform isadopted to guarantee the security of watermark. Experimental results show that the improved watermarkingscheme can overcome the above defects and locate the tampered region effectively.
참고문헌 (18)
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