Secure Reversible Data Hiding Using Block-Wise Histogram Shifting

Reversible data hiding (RDH) techniques recover the original cover image after extraction. Thus, they have gained popularity in e-healthcare, law forensics, and military applications. However, histogram shifting using a reversible embedding technique suffers from low capacity high variability. This work proposes which distribution obtained determines pixels that attain peak or zero distribution. Afterward, adjacent bins of point are shifted, is performed least significant bit (LSB) pixels. Furthermore, robustness improved proposed dynamic block-wise strategy. Besides, secret encrypted before to further strengthen security. The experimental evaluation suggests attains superior stego images with signal-to-noise ratio (PSNR) more than 58 dB for 0.9 bits per pixel (BPP). Additionally, results two-sample t-test Kolmogorov–Smirnov test reveal resistant attacks.