A block-based fragile watermarking scheme for digital image authentication and tamper recovery

Unauthorised access and modification of multimedia content are on the rise with the huge increase in digital communication and multimedia information exchange over the web. For the transmitted images to remain protected and authentic, fraud identification and restoration procedures are required. In light of the aforementioned difficulties, a unique self-embedding block-based fragile watermarking method is introduced with enhanced tamper identification and restoration abilities. In this presented method of watermarking, the cover image is split into non-overlapping 4 × 4 block segments. Seven MSBs of each pixel in the block are used to create the watermark data. The mapping number for each block, where the recovery information is embedded, is created using a key value for that block. The various tampering rates and the number of altered images are used to evaluate the proposed methodology. The SSIM and PSNR values of the recovered image illustrate the uniqueness and efficacy of the method. Copyright © 2024 Inderscience Enterprises Ltd.