Efficient Pixel-Value Differencing Based Hybrid Steganographic Method Using Modulus Function

Aruna Malik and Sonal Gandhi
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Aruna Malik: Department of CSE, NIT Jalandhar, India
Sonal Gandhi: Department of Computer Science and Engineering, G.L. Bajaj Institute of Engineering Technology, Greater Noida, India

International Journal of Information Retrieval Research (IJIRR), 2020, vol. 10, issue 4, 51-62

Abstract: In the era of cloud computing and Big Data, steganographic methods are playing a pivotal role to provide security to sensitive contents. In the steganographic domain, pixel-value differencing (PVD) proposed by Wu and Tsai has been one of the most researched and popular methods as the PVD technique provides good quality stego-image along with high embedding capacity. This article extends the Wu and Tsai's work by proposing a new hybrid steganography scheme which works in two phases to increase the embedding capacity along with stego-image quality. In the first phase, the cover image is preprocessed using a segmentation table to make the image more robust for PVD method. In the second phase, the resultant image is partitioned into 2×1 pixels size blocks in a non-overlapping fashion and then modulus function based scheme is applied in reversible manner. Thus, a significant amount of secret data is embedded into the image. The experimental results prove that the proposed scheme has significantly improved in embedding capacity and quality as compared to the other related PVD-based methods.

Date: 2020
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