• Pallavi Singh

Histogram shifting method based image data hiding is advanced technique to secure image. The information or data transfer from one end to another end using internet is very easy, quick and correct. But security issue is a major challenge for confidential data transfer. In this paper, an efficient reversible data hiding method for encrypted image based on block histogram shifting is proposed, which includes image encryption, reversible data hiding in encrypted domain, and hidden data extraction. The cover image is first partitioned into non-overlapping blocks, and then the pixel values of each block are encrypted by modulo operation. A bit shifting histogram is the generalized ways for image data hiding and improves robustness of encrypted image. Proposed method enhances the quality of the encrypted image and data or information hiding. Mean square error and peak signal to noise ratio is also calculated and find better than existing BHS method.

Image, Encryption, Decryption, Data Hiding, PSNR, Reversible, Block Histogram Shifting, Watermarking.

"Improved Reversible Data Hiding in Encrypted Image Using Block Histogram Shifting with RBHSM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.147-151, June 2019, Available :http://www.jetir.org/papers/JETIR1907O23.pdf

"Improved Reversible Data Hiding in Encrypted Image Using Block Histogram Shifting with RBHSM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp147-151, June 2019, Available at : http://www.jetir.org/papers/JETIR1907O23.pdf