Tamper Detection Using Fragile Image Watermarking Based on Chaotic System
Development in computer networks and digital technology provides ease of distribution and wide availability of digital images but also facilitate illegal copying and malicious tampering. In this paper, we propose a novel chaos-based watermarking scheme for image authentication and tamper localization and detection. In the proposed scheme, watermark is embedded in spatial domain using LSB technique. LSB techniques are used to improve the robustness. Two chaotic maps, i.e., Arnold transform and logistic maps, are used to enhance the security of fragile watermarking; these are sensitive to initial condition and used as secret key. Least significant methods are used to embed the watermark information to improve the imperceptibility of watermarked image. Experimental results show that the proposed scheme is secure. It localizes and detects tampering with high accuracy under different types of tampering.
KeywordsFragile Watermarking Chaotic Maps Least Significant Bit Tamper Detection Authentication
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