This paper presents a novel watermarking technique utilizing a secure hash algorithm to generate a hash from singular values of the high frequency component of wavelet transformed images, aimed at protecting digital images from invertibility attacks. The method allows for simultaneous watermarking and compression through the wavelet domain, ensuring data integrity via histogram modification and maintaining signal quality during compression. Results indicate robust security against geometric and signal processing attacks, with distortion-free restored images.

1. Non-Invertible Wavelet Domain Watermarking
using Hash Function
*Gangadhar Tiwari1, Debashis Nandi 2, Madhusudhan Mishra3
1,2 IT Department, NIT, Durgapur-713209, West Bengal, India,
3ECE Department, NERIST, Nirjuli-791109, Arunachal Pradesh, India,
1www.icgst.com
http://www.icgst.com/paper.aspx?pid=P1151345302

2. This paper proposes a novel watermarking technique by employing Secure Hash Algorithm-
2 for generating hash from singular values of high frequency component of wavelet
transformed sample image and using it as watermark to protect digital images against
invertibility attack. The invertibility attack aims to find a fake watermark and fake original
from a watermarked image, to falsely claim the ownership. This scheme performs
watermarking and compression simultaneously, by hiding the watermark in wavelet domain
and employing arithmetic encoding for compression. Data losses are prevented by
performing Histogram modification at both pre and post processing stages. Simulation
results indicate that the watermarking scheme is secure against invertibility attack;
watermark is recoverable even if the content is altered by geometric attacks, and robust to
signal processing distortions. Besides, hiding the watermark in middle bit plane of integer
wavelet coefficients and its high frequency sub-bands provides better signal quality while
arithmetic encoding results in compressed data. The restored images are distortion free
2www.icgst.com
http://www.icgst.com/paper.aspx?pid=P1151345302
Non-Invertible Wavelet Domain Watermarking using Hash Function
Abstract

3. 3www.icgst.com
Mr. Gangadhar Tiwari completed B.Sc.(Mathematics) from Guwahati University,
Guwahati in 2006 and M.Sc.(Information Technology) from Punjab Technical
University,Jalandhar in 2011. Currently, he is pursuing PhD at NIT Durgapur, India.His
research interests include Information Security and Digital Image Processing.
NIT Durgapur
http://www.nitdgp.ac.in/

4. 4www.icgst.com
Dr. Debashis Nandi received his BE degree in Electronics and Communication
Engineering from RE College, Durgapur (University of Burdwan), India, in 1994 and M.
Tech. Degree from Burdwan University on Microwave Engineering in 1997. He
received his PhD degree from IIT, Kharagpur, India on Medical Imaging Technology.
His area of research includes Computer security and cryptography, Secure chaotic
communication, Video coding. He is an Associate Professor in the Department of
Information Technology, NIT, Durgapur, India.
NIT Durgapur
http://www.nitdgp.ac.in/

5. 5www.icgst.com
Mr. Abhishek Kumar received his B.Tech degree in Electrical and Electronics
Engineering from Pondicherry University in 2009 and M.Tech degree in Power System
Engineering from North Eastern Regional Institute of Science and Technology, India in
the 2012.He is currently working as an Assistant Professor with Department of
Electrical & Electronics Engineering, National Institute of Technology, Arunachal
Pradesh, India.
National Institute of Technology, Arunachal
Prades
http://www.nitap.in/

6. 6www.icgst.com
Mr. Madhusudhan Mishra has completed his B.Tech in Electronics and
Communication Engineering from North Eastern Regional Institute of Science and
Technology (NERIST), Nirjuli, Arunachal Pradesh in 2004 and M.Tech in Signal
Processing from IIT Guwahati in 2011. He worked in Sankara Institute of Technology,
Kukas, Jaipur for some years and joined NERIST as Assistant Professor in 2006. His
main interest of research area includes Digital Signal and Image Processing.
National Institute of Technology, Arunachal
Prades
http://www.nitap.in/

7. 7