naa a22 4500 510798063 CHVBK 20180411083343.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1132-x doi (NATIONALLICENCE)springer-10.1007/s11277-013-1132-x Optimized Spread Spectrum Watermarking for Fading-Like Collusion Attack with Improved Detection Performance [Elektronische Daten] [Santi Maity, Seba Maity, Jaya Sil, Claude Delpha] This paper proposes an optimized spread spectrum image watermarking scheme robust against fading-like collusion attack using genetic algorithms (GA) in multiband (M-band) wavelet decomposition. M-band decomposition of host data offers advantages in better scale-space tiling and good energy compactness. This makes watermarking robust against frequency selective fading-like attack gain. On the other hand, GA would determine a threshold value for the selection of host coefficients (process gain i.e. the length of spreading code) used in watermark casting along with the respective embedding strengths. We then consider colluder (random gain) identification as multiuser detection problem and use successive interference cancelation (SIC) to accurately detect weak (low gain) colluder and innocent users too. A weighted correlator is developed first where weight factors are calculated through training/learning using a neural network. A closed mathematical form of joint probability of error is developed with the objective of minimizing the probability of false detection i.e. a colluder is identified as an innocent user and an innocent user is identified as a colluder, for a set of colluders involved. Simulation results show the relative performance gain of the weighted correlator and SIC scheme compared to the existing works. Springer Science+Business Media New York, 2013 Spread spectrum watermarking nationallicence M-band wavelets nationallicence GA nationallicence Optimization nationallicence Fading nationallicence NN nationallicence Maity Santi Department of Information Technology, Bengal Engineering and Science University, 711 103, Shibpur, Howrah, India aut Maity Seba Department of Electronics and Communication Engineering, College of Engineering and Management, Kolaghat, KTPP Township, 711 171, Midnapur East, India aut Sil Jaya Department of Computer Science & Technology, Bengal Engineering and Science University, 711 103, Shibpur, Howrah, India aut Delpha Claude CNRS, SUPELEC, Université Paris-Sud, Paris, France aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1737-1753 0929-6212 72:3<1737 2013 72 11277 https://doi.org/10.1007/s11277-013-1132-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1132-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maity Santi Department of Information Technology, Bengal Engineering and Science University, 711 103, Shibpur, Howrah, India aut NATIONALLICENCE 700 1- Maity Seba Department of Electronics and Communication Engineering, College of Engineering and Management, Kolaghat, KTPP Township, 711 171, Midnapur East, India aut NATIONALLICENCE 700 1- Sil Jaya Department of Computer Science & Technology, Bengal Engineering and Science University, 711 103, Shibpur, Howrah, India aut NATIONALLICENCE 700 1- Delpha Claude CNRS, SUPELEC, Université Paris-Sud, Paris, France aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1737-1753 0929-6212 72:3<1737 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer