Four-scanning Attack on Hierarchical Digital Watermarking Method for Image Tamper Detection and Recovery

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题名:	Four-scanning Attack on Hierarchical Digital Watermarking Method for Image Tamper Detection and Recovery
作者:	Chang, C. C.;Fan, Y. H.;Tai, W. L.
关键词:	Fragile watermarking;Image authentication;Tamper detection
日期:	2008-02
上传时间:	2009-12-17 06:57:50 (UTC+0)
出版者:	Asia University
摘要:	In a recent paper presented by Lin et al., a block-based hierarchical watermarking algorithm for digital images is proposed. It adopts parity check and the intensity-relation check to conduct the experiment of image tamper detection. Their experimental results indicate that the precision of tamper detection and localization is 99.6% and 100% after level-2 and level-3 inspections, respectively. The proposed attacks demonstrate that this watermarking algorithm is fundamentally flawed in that the attacker can tamper a watermarked image easily without being detected. In this paper, a four-scanning attack aimed to Lin et al.'s watermarking method is presented to create tampered images. Furthermore, in case they use encryption to protect their 3-tuple-watermark, we proposed a blind attack to tamper watermarked images without being detected. Experimental results are given to support and enhance our conclusions, and demonstrate that our attacks are successful in tampering watermarked images.
關聯:	Pattern Recognition 41(2): 654-661
显示于类别:	[資訊工程學系] 期刊論文

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