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Iran University of Science and Technology

Academic institutionasia · ir
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Research library56linked papers
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Selected work

Representative Papers

Bit-Level Triangular Content-Aware Permutation for Fragile Image Watermarking: Zero False Positive Rate, Single-Bit Sensitivity, and Arbitrary Dimension Support

Aug 14, 2026

This study addresses the vulnerability of existing fragile watermarking schemes to vector quantization (VQ) and collage attacks, as well as their inherent size constraints, by proposing a dimension-independent fragile watermarking algorithm. The method employs bit-level triangular content-aware permutation to replace conventional hash functions, combined with a vertical sandwich transform and residue merging strategy, enabling content-dependent watermark generation and secure tamper localization for arbitrary-sized images. Experimental results demonstrate zero false positives and false negatives across 17 attack types, achieving a PSNR of 99.33 dB. The proposed approach effectively resists VQ, collage, and geometric attacks while maintaining single-bit sensitivity and eliminating zero-padding limitations, rendering it highly suitable for digital forensics and medical image authentication applications.

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Recent publications

Latest Papers

Bit-Level Triangular Content-Aware Permutation for Fragile Image Watermarking: Zero False Positive Rate, Single-Bit Sensitivity, and Arbitrary Dimension Support

Aug 14, 2026

This study addresses the vulnerability of existing fragile watermarking schemes to vector quantization (VQ) and collage attacks, as well as their inherent size constraints, by proposing a dimension-independent fragile watermarking algorithm. The method employs bit-level triangular content-aware permutation to replace conventional hash functions, combined with a vertical sandwich transform and residue merging strategy, enabling content-dependent watermark generation and secure tamper localization for arbitrary-sized images. Experimental results demonstrate zero false positives and false negatives across 17 attack types, achieving a PSNR of 99.33 dB. The proposed approach effectively resists VQ, collage, and geometric attacks while maintaining single-bit sensitivity and eliminating zero-padding limitations, rendering it highly suitable for digital forensics and medical image authentication applications.

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