Title	Audio Zero-Watermarking Based on Discrete Hartley Transform and Non-Negative Matrix Factorization
Author	Pranab Kumar Dhar, Emtiaj Hasan, and Tetsuya Shimamura
Citation	Vol. 17  No. 8  pp. 11-18
Keywords	Copyright protection Discrete Hartley transform Non-negative matrix factorization Zero watermarking

Title	Image Steganography Based on Modified LSB Substitution Method and Data Mapping
Author	Pranab Kumar Dhar, Abdul Kaium, and Tetsuya Shimamura
Citation	Vol. 18  No. 3  pp. 155-160
Keywords	Image steganography, Least Significant Bit, Data mapping, Peak signal-to-noise ratio, structural similarity.