An SVD-based Fragile Watermarking Scheme With Grouped Blocks

TL;DR

This paper introduces a fragile watermarking scheme based on SVD and grouped blocks that enhances image authentication by resisting VQ attacks and providing precise tamper localization.

Contribution

It presents a novel SVD-based watermarking method with grouped blocks that improves security and tamper detection in digital images.

Findings

Resists Vector Quantization attacks effectively

Provides accurate tamper localization

Enhances security through statistical embedding positions

Abstract

This paper proposes a novel fragile watermarking scheme for digital image authentication which is based on Singular Value Decomposition(SVD) and grouped blocks. The watermark bits which include two types of bits are inserted into the least significant bit(LSB) plane of the host image using the adaptive chaotic map to determine the positions. The groped blocks break the block-wise independence and therefore can withstand the Vector Quantization attack(VQ attack). The inserting positions are related to the statistical information of image block data, in order to increase the security and provide an auxiliary way to authenticate the image data. The effectiveness of the proposed scheme is checked by a variety of attacks, and the experimental results prove that it has a remarkable tamper detection ability and also has a precise locating ability.