A New Dual Image-Based Steganographic Scheme for Authentication and Tampered Detection Using (7, 4) Hamming Code

摘要

Here we proposed an efficient dual image-based reversible steganographic technique using (7,4) Hamming code for image authentication and tampered detection. In this approach, the cover image is partitioned into (1 × 7) pixel blocks. The blocks are copied into two separate images, and three Least Significant Bits (LSB) are collected from each block separately. Then perform odd parity adjustment using Hamming code. Two symmetry keys k and ξ are used for data embedding and stego block distribution among dual images, respectively. To embed secret bit complement data bit at k position, then secret data bit is embedded through error creation at random positions within the block excluding the position of k such that errors are corrected and cover image is recovered through (7,4) Hamming code. The proposed scheme has been verified through experimental results with existing scheme. The performance of this scheme is comparatively better in terms of visual quality. The experimental results showed that this new steganographic technique can be also applied for authentication and tampered detection.